Neuro 4 Midbrain

Question 1

Midbrain is split into Anterior and posterior by

Answer 1

Cerebral aqueduct of sylvius

Question 2

Anterior part of midbrain is called

Answer 2

Cerebral peduncle

Question 3

Posterior part of midbrain is called

Answer 3

tectum

Question 4

features of the ventral surface of Midbrain

Answer 4

• 2 Cerebral peduncles: emerge from upper surface of pons (creating interpeduncular fossa in the middle) and ascend to disappear in the substance of cerebral hemispheres

Question 5

Oculomotor Nerve (III) exits midbrain from

Answer 5

Interpeduncular fossa of the midbrain

Question 6

Posterior surface of the midbrain presents

Answer 6

• 2 Superior Colliculi: overlying visual reflexes
• 2 Inferior Colliculi: overyling Auditory reflexes
• 2 Superior cerbellar peduncles: run backwards, downwards and laterally along the sides of 4th ventricle to enter the cerbellum, connecting cerebellum with midbrain
• Exit of the Trochlear Nerve (IV): jut below inferior colliculi

Question 7

The only Cranial Nerve emerging from the dorsal Aspect of the midbrain

Answer 7

Trochlear N (IV)

Question 8

Lateral suface of midbrain(cerebral Peduncle) presents

Answer 8

• Superior brachium: connects superior Colliculi with lateral geniculate body
• Inferior Brachium: connect inferior Colliculi with medial geniculate body

Question 9

Lateral surface of pons is crossed by

Answer 9

3 Arteries:
* anterior choroidal A
* Posterior Cerebral A
* Superior Cerebellar A

2 Nerves:
* Trochlear N
* Optic Tract

1 Vein: Basal Vein

Question 10

Lateral surface of midbrain is also related to

Answer 10

Tentorial Notch of tentorium cerebelli