The circle of Willis (also called Willis' circle, loop of Willis, cerebral arterial circle, and Willis polygon) is a circulatory anastomosis that supplies blood to the brain and surrounding structures. It is named after Thomas Willis (1621–1675), an Englishphysician.
Structure
The circle of Willis is a part of the cerebral circulation and is composed of the following arteries:
The left and right internal carotid arteries arise from the left and right common carotid arteries.
The posterior communicating artery is given off as a branch of the internal carotid artery just before it divides into its terminal branches - the anterior and middle cerebral arteries. The anterior cerebral artery forms the anterolateral portion of the circle of Willis, while the middle cerebral artery does not contribute to the circle.
Official Ninja Nerd Website: https://ninjanerd.org/
Ninja Nerds!
In this lecture Professor Zach Murphy will be presenting on the arterial supply to the brain, which is also referred to as the circle of willis. We are looking at this diagram in an inferior view and branch out from the internal carotid feeding the anterior portion of the brain, and the vertebrobasilar system which is supplying the posterior portion of the brain. Finally, we look at each artery that forms the circle of willis including the anterior cerebral artery, the anterior communicating artery, the middle cerebral artery, the posterior cerebral artery, and the posterior communicating artery. We hope you enjoy this lecture and be sure to support us below!
Join this channel to get access to perks:
https://www.youtube.com...
published: 27 Feb 2018
Circle of Willis - 3D Anatomy Tutorial
3D anatomy tutorial on the Circle of Willis.
-------------------------------
Join me on Instagram: https://www.instagram.com/theanatomyzone/
Website: https://www.anatomyzone.com
-------------------------------
Join the Facebook page for updates: http://www.facebook.com/anatomyzone
Follow me on twitter: http://www.twitter.com/anatomyzone
Subscribe to the channel for more videos and updates: http://www.youtube.com/subscription_center?add_user=theanatomyzone
published: 09 Aug 2013
Anatomy - Brain (Circle of Willis and Stroke)
http://armandoh.org/
🎥 DON’T JUST WATCH, LEARN ACTIVELY! TRY THE QUIZ! 🤓
https://youmakr.ai/test-playground/questionnaire/673d44a1859b9c170836ef24
👆 Hit this quiz and show off your main character aura!
https://www.facebook.com/ArmandoHasudungan
Support me:
http://www.patreon.com/armando
Instagram:
http://instagram.com/armandohasudungan
Twitter:
https://twitter.com/Armando71021105
SPECIAL THANKS:
Patreon members
Artline Australia: http://www.artline.com.au/
published: 07 Sep 2015
The Circle of Willis Rapid Review
Welcome to Soton Brain Hub- the brain explained!
In this video, Scott gives a rapid overview of the Circle of Willis and arterial blood supply to the brain!
Subscribe to our YouTube channel for more videos!
published: 01 May 2016
Neuroscience - Circle of Willis Mnemonic
C - Anterior communicating artery
A - Anterior cerebral arteries
I - Internal carotid arteries
C - Posterior communicating arteries
P - Posterior cerebral arteries
B - Basilar artery
S - Superior cerebellar arteries
P - Pontine arteries
A - Anterior inferior cerebellar arteries
V - Vertebral arteries
P - Posterior inferior cerebellar arteries
Circle of Willis image from public domain, wikimedia - uploaded by user Rhcastilhos
published: 12 Apr 2015
Blood supply to the brain (circle of Willis)
The anatomy of the blood supply to the brain, including the circle of Willis (or circulus arteriosus). I talk about the vertebral and internal carotid arteries, the basilar artery and the circle of Willis, and mention the cerebral and cerebellar arteries, the blood-brain barrier and the idea of cerebral perfusion pressure.
See also this online thing Steve Atherton and I made:
https://scs.swan.ac.uk/elearning/willis/
Music by Broke for Free
http://freemusicarchive.org/music/Broke_For_Free/
(Licensed for use under Creative Commons Licenses, see above links for details).
published: 11 Oct 2016
Blood Supply to Brain | Circle of Willis | Neuroanatomy
#boolodsupply #drnajeeb #medicines #pharmacology #drnajeeblectures
Blood Supply to Brain | Circle of Willis | Neuroanatomy
Like this video? Sign up now on our website at https://www.DrNajeebLectures.com
to access 800+ Exclusive videos on Basic Medical Sciences & Clinical Medicine. These are premium videos (NOT FROM YOUTUBE). All these videos come with English subtitles & download options. Sign up now! Get Lifetime Access for a one-time payment of $99 ONLY!
Sign up now on our website at https://members.drnajeeblectures.com/#!/register-fast
---------------------------------------------------------------------------------------------------------------------------
Why sign up for premium membership? Here's why!
Membership Features for premium website members.
1. More than 800+ Medical L...
published: 22 Apr 2017
Circle of Willis Animation : Neuroanatomy USMLE Step 1
📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- https://www.instagram.com/drgbhanuprakash
📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- https://t.me/bhanuprakashdr
📌𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗧𝗼 𝗠𝘆 𝗠𝗮𝗶𝗹𝗶𝗻𝗴 𝗟𝗶𝘀𝘁:- https://linktr.ee/DrGBhanuprakash
Gross Anatomy of Circle of Willis and clinical Significance
Circle of Willis
-----------------------
Definition: a vascular circuit formed by the anastomoses between branches of the internal carotid arteries (anterior circulation) and vertebral arteries (posterior circulation) around the optic chiasm and pituitary stalk
Consists of paired:
------------------------------
Internal carotid arteries (proximal to the origin of the middle cerebral arteries)
Anterior cerebral arteries (terminal branches of the internal carotids)
Posterior cerebral arteries (terminal branches of the vertebral arteries)...
Official Ninja Nerd Website: https://ninjanerd.org/
Ninja Nerds!
In this lecture Professor Zach Murphy will be presenting on the arterial supply to the brain, ...
Official Ninja Nerd Website: https://ninjanerd.org/
Ninja Nerds!
In this lecture Professor Zach Murphy will be presenting on the arterial supply to the brain, which is also referred to as the circle of willis. We are looking at this diagram in an inferior view and branch out from the internal carotid feeding the anterior portion of the brain, and the vertebrobasilar system which is supplying the posterior portion of the brain. Finally, we look at each artery that forms the circle of willis including the anterior cerebral artery, the anterior communicating artery, the middle cerebral artery, the posterior cerebral artery, and the posterior communicating artery. We hope you enjoy this lecture and be sure to support us below!
Join this channel to get access to perks:
https://www.youtube.com/channel/UC6QYFutt9cluQ3uSM963_KQ/join
Support us by purchasing apparel and donating to our Patreon!
APPAREL
We are switching merchandise suppliers.
DONATE
PATREON | https://www.patreon.com/NinjaNerdScience
PAYPAL | https://www.paypal.com/paypalme/ninjanerdscience
SOCIAL MEDIA
FACEBOOK | https://www.facebook.com/NinjaNerdLectures
INSTAGRAM | https://www.instagram.com/ninjanerdlectures
TWITTER | https://twitter.com/ninjanerdsci
@NinjaNerdSci
DISCORD | https://discord.gg/3srTG4dngW
#ninjanerd #CircleOfWillis #CirculatorySystem
Official Ninja Nerd Website: https://ninjanerd.org/
Ninja Nerds!
In this lecture Professor Zach Murphy will be presenting on the arterial supply to the brain, which is also referred to as the circle of willis. We are looking at this diagram in an inferior view and branch out from the internal carotid feeding the anterior portion of the brain, and the vertebrobasilar system which is supplying the posterior portion of the brain. Finally, we look at each artery that forms the circle of willis including the anterior cerebral artery, the anterior communicating artery, the middle cerebral artery, the posterior cerebral artery, and the posterior communicating artery. We hope you enjoy this lecture and be sure to support us below!
Join this channel to get access to perks:
https://www.youtube.com/channel/UC6QYFutt9cluQ3uSM963_KQ/join
Support us by purchasing apparel and donating to our Patreon!
APPAREL
We are switching merchandise suppliers.
DONATE
PATREON | https://www.patreon.com/NinjaNerdScience
PAYPAL | https://www.paypal.com/paypalme/ninjanerdscience
SOCIAL MEDIA
FACEBOOK | https://www.facebook.com/NinjaNerdLectures
INSTAGRAM | https://www.instagram.com/ninjanerdlectures
TWITTER | https://twitter.com/ninjanerdsci
@NinjaNerdSci
DISCORD | https://discord.gg/3srTG4dngW
#ninjanerd #CircleOfWillis #CirculatorySystem
3D anatomy tutorial on the Circle of Willis.
-------------------------------
Join me on Instagram: https://www.instagram.com/theanatomyzone/
Website: https://w...
3D anatomy tutorial on the Circle of Willis.
-------------------------------
Join me on Instagram: https://www.instagram.com/theanatomyzone/
Website: https://www.anatomyzone.com
-------------------------------
Join the Facebook page for updates: http://www.facebook.com/anatomyzone
Follow me on twitter: http://www.twitter.com/anatomyzone
Subscribe to the channel for more videos and updates: http://www.youtube.com/subscription_center?add_user=theanatomyzone
3D anatomy tutorial on the Circle of Willis.
-------------------------------
Join me on Instagram: https://www.instagram.com/theanatomyzone/
Website: https://www.anatomyzone.com
-------------------------------
Join the Facebook page for updates: http://www.facebook.com/anatomyzone
Follow me on twitter: http://www.twitter.com/anatomyzone
Subscribe to the channel for more videos and updates: http://www.youtube.com/subscription_center?add_user=theanatomyzone
http://armandoh.org/
🎥 DON’T JUST WATCH, LEARN ACTIVELY! TRY THE QUIZ! 🤓
https://youmakr.ai/test-playground/questionnaire/673d44a1859b9c170836ef24
👆 Hit this q...
http://armandoh.org/
🎥 DON’T JUST WATCH, LEARN ACTIVELY! TRY THE QUIZ! 🤓
https://youmakr.ai/test-playground/questionnaire/673d44a1859b9c170836ef24
👆 Hit this quiz and show off your main character aura!
https://www.facebook.com/ArmandoHasudungan
Support me:
http://www.patreon.com/armando
Instagram:
http://instagram.com/armandohasudungan
Twitter:
https://twitter.com/Armando71021105
SPECIAL THANKS:
Patreon members
Artline Australia: http://www.artline.com.au/
http://armandoh.org/
🎥 DON’T JUST WATCH, LEARN ACTIVELY! TRY THE QUIZ! 🤓
https://youmakr.ai/test-playground/questionnaire/673d44a1859b9c170836ef24
👆 Hit this quiz and show off your main character aura!
https://www.facebook.com/ArmandoHasudungan
Support me:
http://www.patreon.com/armando
Instagram:
http://instagram.com/armandohasudungan
Twitter:
https://twitter.com/Armando71021105
SPECIAL THANKS:
Patreon members
Artline Australia: http://www.artline.com.au/
Welcome to Soton Brain Hub- the brain explained!
In this video, Scott gives a rapid overview of the Circle of Willis and arterial blood supply to the brain!
S...
Welcome to Soton Brain Hub- the brain explained!
In this video, Scott gives a rapid overview of the Circle of Willis and arterial blood supply to the brain!
Subscribe to our YouTube channel for more videos!
Welcome to Soton Brain Hub- the brain explained!
In this video, Scott gives a rapid overview of the Circle of Willis and arterial blood supply to the brain!
Subscribe to our YouTube channel for more videos!
C - Anterior communicating artery
A - Anterior cerebral arteries
I - Internal carotid arteries
C - Posterior communicating arteries
P - Posterior cerebral arter...
C - Anterior communicating artery
A - Anterior cerebral arteries
I - Internal carotid arteries
C - Posterior communicating arteries
P - Posterior cerebral arteries
B - Basilar artery
S - Superior cerebellar arteries
P - Pontine arteries
A - Anterior inferior cerebellar arteries
V - Vertebral arteries
P - Posterior inferior cerebellar arteries
Circle of Willis image from public domain, wikimedia - uploaded by user Rhcastilhos
C - Anterior communicating artery
A - Anterior cerebral arteries
I - Internal carotid arteries
C - Posterior communicating arteries
P - Posterior cerebral arteries
B - Basilar artery
S - Superior cerebellar arteries
P - Pontine arteries
A - Anterior inferior cerebellar arteries
V - Vertebral arteries
P - Posterior inferior cerebellar arteries
Circle of Willis image from public domain, wikimedia - uploaded by user Rhcastilhos
The anatomy of the blood supply to the brain, including the circle of Willis (or circulus arteriosus). I talk about the vertebral and internal carotid arteries,...
The anatomy of the blood supply to the brain, including the circle of Willis (or circulus arteriosus). I talk about the vertebral and internal carotid arteries, the basilar artery and the circle of Willis, and mention the cerebral and cerebellar arteries, the blood-brain barrier and the idea of cerebral perfusion pressure.
See also this online thing Steve Atherton and I made:
https://scs.swan.ac.uk/elearning/willis/
Music by Broke for Free
http://freemusicarchive.org/music/Broke_For_Free/
(Licensed for use under Creative Commons Licenses, see above links for details).
The anatomy of the blood supply to the brain, including the circle of Willis (or circulus arteriosus). I talk about the vertebral and internal carotid arteries, the basilar artery and the circle of Willis, and mention the cerebral and cerebellar arteries, the blood-brain barrier and the idea of cerebral perfusion pressure.
See also this online thing Steve Atherton and I made:
https://scs.swan.ac.uk/elearning/willis/
Music by Broke for Free
http://freemusicarchive.org/music/Broke_For_Free/
(Licensed for use under Creative Commons Licenses, see above links for details).
#boolodsupply #drnajeeb #medicines #pharmacology #drnajeeblectures
Blood Supply to Brain | Circle of Willis | Neuroanatomy
Like this video? Sign up now on ou...
#boolodsupply #drnajeeb #medicines #pharmacology #drnajeeblectures
Blood Supply to Brain | Circle of Willis | Neuroanatomy
Like this video? Sign up now on our website at https://www.DrNajeebLectures.com
to access 800+ Exclusive videos on Basic Medical Sciences & Clinical Medicine. These are premium videos (NOT FROM YOUTUBE). All these videos come with English subtitles & download options. Sign up now! Get Lifetime Access for a one-time payment of $99 ONLY!
Sign up now on our website at https://members.drnajeeblectures.com/#!/register-fast
---------------------------------------------------------------------------------------------------------------------------
Why sign up for premium membership? Here's why!
Membership Features for premium website members.
1. More than 800+ Medical Lectures.
2. Basic Medical Sciences & Clinical Medicine.
3. Mobile-friendly interface with android and iOS apps.
4. English subtitles and new videos every week.
5. Download option for offline video playback.
6. Fanatic customer support and that's 24/7.
7. Fast video playback option to learn faster.
8. Trusted by over 2M+ students in 190 countries.
---------------------------------------------------------------------------------------------------------------------------
Blood supply to the brain is normally divided into anterior and posterior segments, relating to the different arteries that supply the brain. The two main pairs of arteries are the Internal carotid arteries (supply the anterior brain) and vertebral arteries (supplying the brainstem and posterior brain). The anterior and posterior cerebral circulations are interconnected via bilateral posterior communicating arteries. They are part of the Circle of Willis, which provides backup circulation to the brain. In case one of the supply arteries is occluded, the Circle of Willis provides interconnections between the anterior and the posterior cerebral circulation along the floor of the cerebral vault, providing blood to tissues that would otherwise become ischemic.
The anterior cerebral circulation is the blood supply to the anterior portion of the brain including eyes. It is supplied by the following arteries:
Internal carotid arteries: These large arteries are the medial branches of the common carotid arteries which enter the skull, as opposed to the external carotid branches which supply the facial tissues; the internal carotid artery branches into the anterior cerebral artery and continues to form the middle cerebral artery.
Anterior cerebral artery (ACA)
Anterior communicating artery: Connects both anterior cerebral arteries, within and along the floor of the cerebral vault.
Middle cerebral artery (MCA)
The posterior cerebral circulation is the blood supply to the posterior portion of the brain, including the occipital lobes, cerebellum and brainstem. It is supplied by the following arteries:
Vertebral arteries: These smaller arteries branch from the subclavian arteries which primarily supply the shoulders, lateral chest, and arms. Within the cranium the two vertebral arteries fuse into the basilar artery.
Posterior inferior cerebellar artery (PICA)
Basilar artery: Supplies the midbrain, cerebellum, and usually branches into the posterior cerebral artery
Anterior inferior cerebellar artery (AICA)
Pontine branches
Superior cerebellar artery (SCA)
Posterior cerebral artery (PCA)
Posterior communicating artery
---------------------------------------------------------------------------------------------------------------------------
Join this channel to get access to perks:
Sign up now on our website at https://members.drnajeeblectures.com/#!/register-fast
https://www.youtube.com/channel/UCPHpx55tgrbm8FrYYCflAHw/join
Follow us on Facebook :- https://www.facebook.com/DrNajeeb/
Follow us on Instagram :- https://www.instagram.com/drnajeeblectures/
#boolodsupply #drnajeeb #medicines #pharmacology #drnajeeblectures
Blood Supply to Brain | Circle of Willis | Neuroanatomy
Like this video? Sign up now on our website at https://www.DrNajeebLectures.com
to access 800+ Exclusive videos on Basic Medical Sciences & Clinical Medicine. These are premium videos (NOT FROM YOUTUBE). All these videos come with English subtitles & download options. Sign up now! Get Lifetime Access for a one-time payment of $99 ONLY!
Sign up now on our website at https://members.drnajeeblectures.com/#!/register-fast
---------------------------------------------------------------------------------------------------------------------------
Why sign up for premium membership? Here's why!
Membership Features for premium website members.
1. More than 800+ Medical Lectures.
2. Basic Medical Sciences & Clinical Medicine.
3. Mobile-friendly interface with android and iOS apps.
4. English subtitles and new videos every week.
5. Download option for offline video playback.
6. Fanatic customer support and that's 24/7.
7. Fast video playback option to learn faster.
8. Trusted by over 2M+ students in 190 countries.
---------------------------------------------------------------------------------------------------------------------------
Blood supply to the brain is normally divided into anterior and posterior segments, relating to the different arteries that supply the brain. The two main pairs of arteries are the Internal carotid arteries (supply the anterior brain) and vertebral arteries (supplying the brainstem and posterior brain). The anterior and posterior cerebral circulations are interconnected via bilateral posterior communicating arteries. They are part of the Circle of Willis, which provides backup circulation to the brain. In case one of the supply arteries is occluded, the Circle of Willis provides interconnections between the anterior and the posterior cerebral circulation along the floor of the cerebral vault, providing blood to tissues that would otherwise become ischemic.
The anterior cerebral circulation is the blood supply to the anterior portion of the brain including eyes. It is supplied by the following arteries:
Internal carotid arteries: These large arteries are the medial branches of the common carotid arteries which enter the skull, as opposed to the external carotid branches which supply the facial tissues; the internal carotid artery branches into the anterior cerebral artery and continues to form the middle cerebral artery.
Anterior cerebral artery (ACA)
Anterior communicating artery: Connects both anterior cerebral arteries, within and along the floor of the cerebral vault.
Middle cerebral artery (MCA)
The posterior cerebral circulation is the blood supply to the posterior portion of the brain, including the occipital lobes, cerebellum and brainstem. It is supplied by the following arteries:
Vertebral arteries: These smaller arteries branch from the subclavian arteries which primarily supply the shoulders, lateral chest, and arms. Within the cranium the two vertebral arteries fuse into the basilar artery.
Posterior inferior cerebellar artery (PICA)
Basilar artery: Supplies the midbrain, cerebellum, and usually branches into the posterior cerebral artery
Anterior inferior cerebellar artery (AICA)
Pontine branches
Superior cerebellar artery (SCA)
Posterior cerebral artery (PCA)
Posterior communicating artery
---------------------------------------------------------------------------------------------------------------------------
Join this channel to get access to perks:
Sign up now on our website at https://members.drnajeeblectures.com/#!/register-fast
https://www.youtube.com/channel/UCPHpx55tgrbm8FrYYCflAHw/join
Follow us on Facebook :- https://www.facebook.com/DrNajeeb/
Follow us on Instagram :- https://www.instagram.com/drnajeeblectures/
📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- https://www.instagram.com/drgbhanuprakash
📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- https://t.me/bhanuprakashdr
📌𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗧𝗼 𝗠𝘆 𝗠𝗮𝗶𝗹𝗶𝗻𝗴 𝗟𝗶𝘀𝘁:- https://linktr.ee/DrGBhanuprakash
Gross Anatomy of Circle of Willis and clinical Significance
Circle of Willis
-----------------------
Definition: a vascular circuit formed by the anastomoses between branches of the internal carotid arteries (anterior circulation) and vertebral arteries (posterior circulation) around the optic chiasm and pituitary stalk
Consists of paired:
------------------------------
Internal carotid arteries (proximal to the origin of the middle cerebral arteries)
Anterior cerebral arteries (terminal branches of the internal carotids)
Posterior cerebral arteries (terminal branches of the vertebral arteries)
Two anastomoses
------------------------------
Anterior communicating artery: connects the two anterior cerebral arteries
Posterior communicating artery (branch of internal carotid artery): connects the ICA to the posterior cerebral artery
Functional significance
-------------------------------------
The circuit provides alternative channels to bypass a potential site of vascular occlusion.
Equalizes arterial flow to both cerebral hemispheres
Clinical significance
---------------------------------
Most saccular cerebral aneurysms, also known as berry aneurysms, occur in the anterior circulation of the brain, usually at the junction of the anterior cerebral artery and the anterior communicating artery in the circle of Willis. They are the most common cause of nontraumatic subarachnoid hemorrhage.
#circleofwillis #circleofwillisanatomy #neuroanatomy #animatedanatomy #anatomyanimations #neuroanatomyanimations #anatomyofcircleofwillis #bloodsupplyofbrain #brainbloodsupply #circleofwillisusmle #circleofwillis3D #fmge #medicalstudents #neetpg #medicalcollege #mbbslectures #usmleprep #nationalexitexam #nationalexittest #usmlestep1
📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- https://www.instagram.com/drgbhanuprakash
📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- https://t.me/bhanuprakashdr
📌𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗧𝗼 𝗠𝘆 𝗠𝗮𝗶𝗹𝗶𝗻𝗴 𝗟𝗶𝘀𝘁:- https://linktr.ee/DrGBhanuprakash
Gross Anatomy of Circle of Willis and clinical Significance
Circle of Willis
-----------------------
Definition: a vascular circuit formed by the anastomoses between branches of the internal carotid arteries (anterior circulation) and vertebral arteries (posterior circulation) around the optic chiasm and pituitary stalk
Consists of paired:
------------------------------
Internal carotid arteries (proximal to the origin of the middle cerebral arteries)
Anterior cerebral arteries (terminal branches of the internal carotids)
Posterior cerebral arteries (terminal branches of the vertebral arteries)
Two anastomoses
------------------------------
Anterior communicating artery: connects the two anterior cerebral arteries
Posterior communicating artery (branch of internal carotid artery): connects the ICA to the posterior cerebral artery
Functional significance
-------------------------------------
The circuit provides alternative channels to bypass a potential site of vascular occlusion.
Equalizes arterial flow to both cerebral hemispheres
Clinical significance
---------------------------------
Most saccular cerebral aneurysms, also known as berry aneurysms, occur in the anterior circulation of the brain, usually at the junction of the anterior cerebral artery and the anterior communicating artery in the circle of Willis. They are the most common cause of nontraumatic subarachnoid hemorrhage.
#circleofwillis #circleofwillisanatomy #neuroanatomy #animatedanatomy #anatomyanimations #neuroanatomyanimations #anatomyofcircleofwillis #bloodsupplyofbrain #brainbloodsupply #circleofwillisusmle #circleofwillis3D #fmge #medicalstudents #neetpg #medicalcollege #mbbslectures #usmleprep #nationalexitexam #nationalexittest #usmlestep1
Official Ninja Nerd Website: https://ninjanerd.org/
Ninja Nerds!
In this lecture Professor Zach Murphy will be presenting on the arterial supply to the brain, which is also referred to as the circle of willis. We are looking at this diagram in an inferior view and branch out from the internal carotid feeding the anterior portion of the brain, and the vertebrobasilar system which is supplying the posterior portion of the brain. Finally, we look at each artery that forms the circle of willis including the anterior cerebral artery, the anterior communicating artery, the middle cerebral artery, the posterior cerebral artery, and the posterior communicating artery. We hope you enjoy this lecture and be sure to support us below!
Join this channel to get access to perks:
https://www.youtube.com/channel/UC6QYFutt9cluQ3uSM963_KQ/join
Support us by purchasing apparel and donating to our Patreon!
APPAREL
We are switching merchandise suppliers.
DONATE
PATREON | https://www.patreon.com/NinjaNerdScience
PAYPAL | https://www.paypal.com/paypalme/ninjanerdscience
SOCIAL MEDIA
FACEBOOK | https://www.facebook.com/NinjaNerdLectures
INSTAGRAM | https://www.instagram.com/ninjanerdlectures
TWITTER | https://twitter.com/ninjanerdsci
@NinjaNerdSci
DISCORD | https://discord.gg/3srTG4dngW
#ninjanerd #CircleOfWillis #CirculatorySystem
3D anatomy tutorial on the Circle of Willis.
-------------------------------
Join me on Instagram: https://www.instagram.com/theanatomyzone/
Website: https://www.anatomyzone.com
-------------------------------
Join the Facebook page for updates: http://www.facebook.com/anatomyzone
Follow me on twitter: http://www.twitter.com/anatomyzone
Subscribe to the channel for more videos and updates: http://www.youtube.com/subscription_center?add_user=theanatomyzone
http://armandoh.org/
🎥 DON’T JUST WATCH, LEARN ACTIVELY! TRY THE QUIZ! 🤓
https://youmakr.ai/test-playground/questionnaire/673d44a1859b9c170836ef24
👆 Hit this quiz and show off your main character aura!
https://www.facebook.com/ArmandoHasudungan
Support me:
http://www.patreon.com/armando
Instagram:
http://instagram.com/armandohasudungan
Twitter:
https://twitter.com/Armando71021105
SPECIAL THANKS:
Patreon members
Artline Australia: http://www.artline.com.au/
Welcome to Soton Brain Hub- the brain explained!
In this video, Scott gives a rapid overview of the Circle of Willis and arterial blood supply to the brain!
Subscribe to our YouTube channel for more videos!
C - Anterior communicating artery
A - Anterior cerebral arteries
I - Internal carotid arteries
C - Posterior communicating arteries
P - Posterior cerebral arteries
B - Basilar artery
S - Superior cerebellar arteries
P - Pontine arteries
A - Anterior inferior cerebellar arteries
V - Vertebral arteries
P - Posterior inferior cerebellar arteries
Circle of Willis image from public domain, wikimedia - uploaded by user Rhcastilhos
The anatomy of the blood supply to the brain, including the circle of Willis (or circulus arteriosus). I talk about the vertebral and internal carotid arteries, the basilar artery and the circle of Willis, and mention the cerebral and cerebellar arteries, the blood-brain barrier and the idea of cerebral perfusion pressure.
See also this online thing Steve Atherton and I made:
https://scs.swan.ac.uk/elearning/willis/
Music by Broke for Free
http://freemusicarchive.org/music/Broke_For_Free/
(Licensed for use under Creative Commons Licenses, see above links for details).
#boolodsupply #drnajeeb #medicines #pharmacology #drnajeeblectures
Blood Supply to Brain | Circle of Willis | Neuroanatomy
Like this video? Sign up now on our website at https://www.DrNajeebLectures.com
to access 800+ Exclusive videos on Basic Medical Sciences & Clinical Medicine. These are premium videos (NOT FROM YOUTUBE). All these videos come with English subtitles & download options. Sign up now! Get Lifetime Access for a one-time payment of $99 ONLY!
Sign up now on our website at https://members.drnajeeblectures.com/#!/register-fast
---------------------------------------------------------------------------------------------------------------------------
Why sign up for premium membership? Here's why!
Membership Features for premium website members.
1. More than 800+ Medical Lectures.
2. Basic Medical Sciences & Clinical Medicine.
3. Mobile-friendly interface with android and iOS apps.
4. English subtitles and new videos every week.
5. Download option for offline video playback.
6. Fanatic customer support and that's 24/7.
7. Fast video playback option to learn faster.
8. Trusted by over 2M+ students in 190 countries.
---------------------------------------------------------------------------------------------------------------------------
Blood supply to the brain is normally divided into anterior and posterior segments, relating to the different arteries that supply the brain. The two main pairs of arteries are the Internal carotid arteries (supply the anterior brain) and vertebral arteries (supplying the brainstem and posterior brain). The anterior and posterior cerebral circulations are interconnected via bilateral posterior communicating arteries. They are part of the Circle of Willis, which provides backup circulation to the brain. In case one of the supply arteries is occluded, the Circle of Willis provides interconnections between the anterior and the posterior cerebral circulation along the floor of the cerebral vault, providing blood to tissues that would otherwise become ischemic.
The anterior cerebral circulation is the blood supply to the anterior portion of the brain including eyes. It is supplied by the following arteries:
Internal carotid arteries: These large arteries are the medial branches of the common carotid arteries which enter the skull, as opposed to the external carotid branches which supply the facial tissues; the internal carotid artery branches into the anterior cerebral artery and continues to form the middle cerebral artery.
Anterior cerebral artery (ACA)
Anterior communicating artery: Connects both anterior cerebral arteries, within and along the floor of the cerebral vault.
Middle cerebral artery (MCA)
The posterior cerebral circulation is the blood supply to the posterior portion of the brain, including the occipital lobes, cerebellum and brainstem. It is supplied by the following arteries:
Vertebral arteries: These smaller arteries branch from the subclavian arteries which primarily supply the shoulders, lateral chest, and arms. Within the cranium the two vertebral arteries fuse into the basilar artery.
Posterior inferior cerebellar artery (PICA)
Basilar artery: Supplies the midbrain, cerebellum, and usually branches into the posterior cerebral artery
Anterior inferior cerebellar artery (AICA)
Pontine branches
Superior cerebellar artery (SCA)
Posterior cerebral artery (PCA)
Posterior communicating artery
---------------------------------------------------------------------------------------------------------------------------
Join this channel to get access to perks:
Sign up now on our website at https://members.drnajeeblectures.com/#!/register-fast
https://www.youtube.com/channel/UCPHpx55tgrbm8FrYYCflAHw/join
Follow us on Facebook :- https://www.facebook.com/DrNajeeb/
Follow us on Instagram :- https://www.instagram.com/drnajeeblectures/
📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- https://www.instagram.com/drgbhanuprakash
📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- https://t.me/bhanuprakashdr
📌𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗧𝗼 𝗠𝘆 𝗠𝗮𝗶𝗹𝗶𝗻𝗴 𝗟𝗶𝘀𝘁:- https://linktr.ee/DrGBhanuprakash
Gross Anatomy of Circle of Willis and clinical Significance
Circle of Willis
-----------------------
Definition: a vascular circuit formed by the anastomoses between branches of the internal carotid arteries (anterior circulation) and vertebral arteries (posterior circulation) around the optic chiasm and pituitary stalk
Consists of paired:
------------------------------
Internal carotid arteries (proximal to the origin of the middle cerebral arteries)
Anterior cerebral arteries (terminal branches of the internal carotids)
Posterior cerebral arteries (terminal branches of the vertebral arteries)
Two anastomoses
------------------------------
Anterior communicating artery: connects the two anterior cerebral arteries
Posterior communicating artery (branch of internal carotid artery): connects the ICA to the posterior cerebral artery
Functional significance
-------------------------------------
The circuit provides alternative channels to bypass a potential site of vascular occlusion.
Equalizes arterial flow to both cerebral hemispheres
Clinical significance
---------------------------------
Most saccular cerebral aneurysms, also known as berry aneurysms, occur in the anterior circulation of the brain, usually at the junction of the anterior cerebral artery and the anterior communicating artery in the circle of Willis. They are the most common cause of nontraumatic subarachnoid hemorrhage.
#circleofwillis #circleofwillisanatomy #neuroanatomy #animatedanatomy #anatomyanimations #neuroanatomyanimations #anatomyofcircleofwillis #bloodsupplyofbrain #brainbloodsupply #circleofwillisusmle #circleofwillis3D #fmge #medicalstudents #neetpg #medicalcollege #mbbslectures #usmleprep #nationalexitexam #nationalexittest #usmlestep1
The circle of Willis (also called Willis' circle, loop of Willis, cerebral arterial circle, and Willis polygon) is a circulatory anastomosis that supplies blood to the brain and surrounding structures. It is named after Thomas Willis (1621–1675), an Englishphysician.
Structure
The circle of Willis is a part of the cerebral circulation and is composed of the following arteries:
The left and right internal carotid arteries arise from the left and right common carotid arteries.
The posterior communicating artery is given off as a branch of the internal carotid artery just before it divides into its terminal branches - the anterior and middle cerebral arteries. The anterior cerebral artery forms the anterolateral portion of the circle of Willis, while the middle cerebral artery does not contribute to the circle.
Stay away, The more you crawl Deep into the meaning of these words, The more into the hole you dive, Strangled by the feel that all you were is keen to voice, A Jekyll to your Hyde Here, beloved thee, No one to tame your rage Fill my eyes, Recalibrate my brain, Try to skip the fence And leave me drained. Haunted by the memories of those now traitors, unwilling to play by my rules. They'll lie beneath my wall Needn't know of that freedom denied by a puzzled state of mind Needn't know if we'll die out Like a bolt out of the blue. Rip me off my skin and wash my sins away and heal me now. Needn't know of that freedom denied by a puzzled state of mind Needn't know if hell breaks loose Like a bolt out of the blue. Time flies My convictions stray All my life gone to Keep them at bay. I tried hard To undo my sins to find out that I've hit a dead end Had I known Of that freedom denied By a strangled state of mind Had I listened when they said