Motor

Question 1

Pyramidal tract (cst) origin

Answer 1

Betz Cell (layer 5 of cortex)

Question 2

Extra pyramidal tracts

Answer 2

1. Rubrospinal (upperlimb flexors)
2. Reticulospinal (limb extensors)
3. Vestibulospinal (balance)
4. Tectospinal (eyeball)
   2,3,4 - medial motor pathways
   1 - lateral motor pathway

Question 3

Lateral Motor pathway - functions?

Answer 3

aka rubrospinal pathway
New in evolution
1. Writing (distal muscle control)
2. Fine/ skilled motor movements

Question 4

Medial motor pathways

Answer 4

1. Maintains erect posture

2. Proximal muscle control ( paravertebral muscles, antigravity muscles of limbs)