Rostral Mesencephalon

Question 1

Pineal

Answer 1

Circadian secretion of melatonin

Question 2

Anterolateral system

Answer 2

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

Question 3

Medial lemniscus

Answer 3

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

Question 4

Red nucleus

Answer 4

• Motor nucleus in the midbrain
• Origin of rubrospinal tract
  Projection of inf. olivary nucleus

Question 5

Substantia nigra

Answer 5

Par compacta: Source of dopamine

Question 6

Cerebral peduncle or crus cerebri

Answer 6

Cortex to the brainstem (cortiobulbar tract)

- Cortext to spinal cord ( corticospinal tract)

Question 7

Oculomotor nerve CN III

Answer 7

Motor innervation of occulomotor nerves except lateral rectus & superior oblique

Question 8

Superior cerebellar peduncle

Answer 8

Connection to midbrain

Question 9

Optic tract

Answer 9

CN II

Question 10

Lateral geniculate nucleus

Answer 10

• Termination of optic tract

- Caudal part of thalamus

Question 11

Medial geniculate nucleus

Answer 11

• Relays auditory information from the inferior colliculus to auditory cortex

Question 12

Thalamus

Answer 12

relay between different subcortical areas and the cerebral cortex

Question 13

Pretectal nucleus

Answer 13

subcortical visual system

Question 14

Periaqueductal gray

Answer 14

t plays a role in the descending modulation of pain and in defensive behaviour.

Question 15

Cerebral aquaeduct

Answer 15

CSF pathway from midbrain to 3rd or 4th ventricle