Circle of Willis Animation : Neuroanatomy USMLE Step 1
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- čas přidán 6. 03. 2020
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Gross Anatomy of Circle of Willis and clinical Significance
Circle of Willis
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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:
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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
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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
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The circuit provides alternative channels to bypass a potential site of vascular occlusion.
Equalizes arterial flow to both cerebral hemispheres
Clinical significance
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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.
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I must admit that i achieve maximal benefit in CZcams through this channel. I am currently preparing for my MBBS3 first professional exams and the animation videos coming from anatomy and physiology by you is all helpful 100% for me. Thank you very much for everything.
That's great to hear ... have a great career ahead...
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tysm
Muito boa a aula! Que Deus continue te abençoando e que Nossa Senhora te cubra com Seu Manto Sagrado e também à tua família e ao teu trabalho! Abraço da medicina.
SP, 2023
I literally got crystral clear understanding of brain circulation now.. thank you ! 🙂
Tysm
Hands down for Your technique of teaching and efforts for all these medical videos Sir!💯🙏🏻
Tysm
Thanks!
Such an amazingly simple anatomy described , Thanks a lot
Glad you liked it
Madam your voice is so confident and clear
No hurry, so patiently but at the same time very understandable. Thank you & like to hear more madam
AI
Please sir upload the remaining topics of neuroanatomy sir please.... Your videos are really helpful...
That's the best explanation I've seen so far
tysm
the best
Best anatomy channel thnk u so much
Ur most welcome
wonderful demonstration of anatomy
interesting to know how you are able to make these animations
what technical help you are getting ?
we have team of 100 plus employees in my company
Sir please make one video free lecture on mcqs of head an neck n nuronatomy please please
this is so educative.. can you help us by uploading a video on central cord syndrome
Sure
Sir 10.38 PCA left side homonymous hemianopia
Sir please upload lymphatic drainage of head and neck
suree
♥♥♥..
Please subtitle Indonesia