PMSA 03.03.2020

Question 1

Which structure articulates with the oval window in the middle ear?

Answer 1

stapes

Question 2

Which CN emerges from the BS at the junction between the olive and the pyramidal tract?

Answer 2

Hypoglossal

Question 3

What is a berry aneurysm?

Answer 3

• A small aneurysm that looks like a berry and classically occurs at the point at which a cerebral artery departs from the circular artery (the circle of Willis) at the base of the brain.
• Berry aneurysms frequently rupture and bleed.

-> causes subarachnoid haemorrhage

Question 4

What is a berry aneurysm?

Answer 4

• A small aneurysm that looks like a berry and classically occurs at the point at which a cerebral artery departs from the circular artery (the circle of Willis) at the base of the brain.
• Berry aneurysms frequently rupture and bleed.

-> causes subarachnoid haemorrhage

Question 5

Mental nerve

Answer 5

• branch of V3(mandibular N)
• goes through mental foramen
• sensory innervation to the upper chin and lower lip

Question 6

Name the ascending tracts, what sensation type they carry, where they cross over and if they are contra or ipsilateral.

Answer 6

• lateral spinothalamic (pain and temperature; x at spinal cord; c/l;
• anterior spinothalamic (crude touch and vibration; x at sc; c/l)
• dorsal column (gracile and cuneatus; fine/discriminative touch, vibration, proprioception)