Mesencephalon

Question 1

Medial geniculate nucleus

Answer 1

Relays auditory information from the inferior colliculus

Question 2

Mesenphalic CN V

Answer 2

Proprioception of the face

Question 3

Anterolateral system

Answer 3

• Pain, temperature & crude touch
• Three ascending pathways
  
  1. Spinothalamic tracts
  2. Spinoreticulotract
  3. Spinotectal tracts

Question 4

Medial lemniscus

Answer 4

• Well localized touch vibration & joint sensation
• Connection between dorsal column nuclei (cuneate & fasiculus) and the thalamus
• Run through the arcuate fibers

Question 5

Red nucleus

Answer 5

• Motor nucleus of the midbrain

- Origin of rubrospinal tract

Question 6

Substantia nigra

Answer 6

• Pars compacta = source of dopamine

- Dorsal to crus cerebri

Question 7

Ventral Tegmental Area (VTA)

Answer 7

• Dopamine source for the mesolimbic and mesocortical reward system

Question 8

Superior cerebellar peduncle

Answer 8

Connection to the midbrain

Question 9

Oculomotor nucleus and nerve

Answer 9

Motor neurons for ocular muscles except lateral rectus & superior oblique

Question 10

Edgar-Westphal Nucleus

Answer 10

• Pupil constriction for accommodation & pupillary light reflex

Question 11

Periaquaductal gray

Answer 11

Descending modulation of pain

Question 12

Cerebellar aqueduct (sylvius)

Answer 12

CSF pathway from midbrain to 3rd or 4th ventricle