Variations in circle of Willis — Flashcards

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Variations in circle of Willis — Flashcards

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Read Study Notes Questions

Which major cerebral artery supplies the lateral surface of the frontal, parietal, and temporal lobes?

The macula is spared during posterior cerebral artery infarct due to collateral circulation with the _____ artery

Which artery in the Circle of Willis supplies the medial aspect of the frontal and parietal lobes?

Which artery connects the internal carotid artery to the posterior cerebral artery in the Circle of Willis?

What structure is most commonly compressed by an aneurysm of the anterior communicating artery?

An aneurysm of which artery is most commonly associated with a CN III palsy?

Where do saccular "berry" aneurysms tend to occur?

Identify the branch of the vertebral artery labeled as number 3 in the provided image.

Identify the artery in the vertebrobasilar system labeled as number 9 (the vessel formed by the union of branches from both vertebral arteries descending the spinal cord):

#10

anterior cerebral artery (ACA)

Variations in circle of Willis US Medical PG Flashcards - Medical Study Cards

Master Variations in circle of Willis with OnCourse flashcards. These spaced repetition flashcards are designed for medical students preparing for NEET PG, USMLE Step 1, USMLE Step 2, MBBS exams, and other medical licensing examinations.

Variations in circle of Willis Flashcard Deck - 10 Cards

Flashcard 1: Which major cerebral artery supplies the lateral surface of the frontal, parietal, and temporal lobes?

Answer: Middle cerebral artery (MCA)

Extra: The MCA is the largest branch of the internal carotid artery and supplies the lateral surface of the frontal, parietal, and temporal lobes. This territory includes the motor and sensory areas for the face and upper limbs, as well as Broca's and Wernicke's areas in the dominant hemisphere.

Flashcard 2: The macula is spared during posterior cerebral artery infarct due to collateral circulation with the _____ artery

Answer: middle cerebral

Flashcard 3: Which artery in the Circle of Willis supplies the medial aspect of the frontal and parietal lobes?

Answer: Anterior cerebral artery (ACA)

Flashcard 4: Which artery connects the internal carotid artery to the posterior cerebral artery in the Circle of Willis?

Answer: Posterior communicating artery

Extra: Aneurysms of the posterior communicating artery (PCoA) are a common cause of third nerve (oculomotor) palsy.

Flashcard 5: What structure is most commonly compressed by an aneurysm of the anterior communicating artery?

Answer: Optic chiasm compression, resulting in bitemporal hemianopia.

Extra: Aneurysms of the anterior communicating artery (ACom) are the most common site of Berry aneurysms in the Circle of Willis. Due to their location, they can compress the optic chiasm, leading to visual field defects.

Flashcard 6: An aneurysm of which artery is most commonly associated with a CN III palsy?

Answer: CN III (Oculomotor nerve) palsy

Extra: Aneurysms of the posterior communicating artery (PCoA) typically cause a CN III palsy with pupil involvement (mydriasis), because the parasympathetic fibers are superficial on the nerve. Findings: Ptosis, "down and out" eye position, and a dilated pupil.

Flashcard 7: Where do saccular "berry" aneurysms tend to occur?

Answer: bifurcations in Circle of Willis; especially anterior and posterior communicating arteries

Flashcard 8: Identify the branch of the vertebral artery labeled as number 3 in the provided image.

Answer: posterior spinal arteries

Flashcard 9: Identify the artery in the vertebrobasilar system labeled as number 9 (the vessel formed by the union of branches from both vertebral arteries descending the spinal cord):

Answer: Anterior spinal artery

Extra: The anterior spinal artery is formed by the union of two small branches from the vertebral arteries. It descends in the anterior median fissure and supplies the anterior two-thirds of the spinal cord.

Flashcard 10: anterior cerebral artery (ACA)

Answer: medial motor cortex, medial sensory cortex

Extra: leg paralysis and sensory loss

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Variations in circle of Willis Flashcards for USMLE

Study 10 flashcards on Variations in circle of Willis for USMLE Anatomy. These active recall cards cover the key concepts, clinical associations, and high-yield facts from this chapter of Vascular supply (Circle of Willis). Each card is designed to test your understanding rather than just recognition, building stronger and more durable memories for exam day.

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Are Variations in circle of Willis flashcards free?

Yes, all flashcards on this page are completely free. You can study all 10 cards at no cost. For spaced repetition scheduling, download the Oncourse app.

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There are 10 flashcards for Variations in circle of Willis, covering the key concepts, clinical correlations, and high-yield facts from this chapter of Vascular supply (Circle of Willis).

How should I use these flashcards for USMLE?

Read through each prompt and try to answer before revealing the back of the card. This active recall approach builds stronger memories than passive reading. Combine flashcards with the study notes and MCQ practice for the best results.

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Yes. This page covers one chapter of Vascular supply (Circle of Willis). Visit the topic page to see all chapters and their flashcards under Anatomy.

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