Brainstem in Cross-Section

Question 1

Lateral spinothalamic tract

function

Answer 1

pain and temperature

Question 2

Dorsal column/medial lemniscus

function

Answer 2

proprioception, fine touch, vibration

Question 3

Corticospinal tract

function

Answer 3

motor

Question 4

3 tracts through brainstem and decussation

Answer 4

spinothalamic: anterior white commissure 1-2 levels above origin via travel through LIssaur’s tract

dorsal column: thalamus

corticospinal: thalamus

Question 5

Lissaur’s tract

Answer 5

where spinothalamic tract ascends 1-2 levels before ascending

through anterior white commissure

Question 6

Basilar artery stroke

Answer 6

medial part of brainstem

incl. dorsal column/medial lemniscus pathway

proprioception, fine touch, vibration deficits

⇒ locked in syndrome

Question 7

Anterior Inferior Cerebellar Artery

AICA

stroke

Answer 7

lateral pontine syndrome

CNVIII: vomiting, vertigo, nystagmus, ipsilateral hearing loss

Spinothalamic: decreased pain, sensation

CNV: decreased pain, temp

Question 8

Anterial spinal artery

supplies

Answer 8

medial portion of medulla

ie medial lemniscus

affects propioception, fine touch, vibration