Vertebrobasilar System

Question 1

Where do the vertebral arteries merge into one artery?

Answer 1

Medulla

Question 2

Which arteries supply the medulla?

Answer 2

Vertebral Artery

Question 3

Which arteries supply the Pons and Midbrain?

Answer 3

Basilar Arteries

Question 4

Which arteries supply the cerebellum?

Answer 4

PICA, AICA and SCA

Question 5

Which arteries can cause Wallenburg Syndrome aka Lateral Medullary Syndrome?

Answer 5

1. Vertebral Arteries (most common)
2. PICA (Posterior Inferior Cerebellar Artery
3. Superior/Middle/Inferior Medullary Artery

Question 6

What deficits do you usually see with Wallenburg Syndrome? (5 main categories)

Answer 6

1. Ipsilateral Horner Syndrome
2. Ipsilateral face pain and temperature loss
3. Ipsilateral ataxia
4. Contralateral arm/leg pain/temp loss
5. Dysphagia, Hiccups and Hoarseness
6. Vertigo, Nausea and Vomiting

Question 7

What are the symptoms of Horner Syndrome?

Answer 7

1. Ptosis (drooping eyelid)
2. Miosis (pupil constriction)
3. Anhidrosis (reduce sweating)

Question 8

What areas are affected with Benedict Syndrome ? (5)

Answer 8

1. Oculomotor Nerve (CN3)
2. Edinger Westphal Nuclei
3. Red Nucleus
4. Crus Cerebri
5. Substantia Nigra