Spinal Cord Descending Systems Flashcards
1
Q
Describe the corticospinal tract pathway.
A
90% of the nerves go through the lateral corticospinal tract and 10% through the anterior corticospinal tract (lateral will cross over and the anterior will not) ->
Pyramids of the Medulla ->
Corticospinal Tract ->
Motor Cortex
2
Q
What does the corticospinal tract control?
A
Fine movements
3
Q
What movements is the ventral horn responsible for?
A
Independent digit movements
Primarily controls flexors
4
Q
What movements is the dorsal horn responsible for?
A
None.
It is sensory
5
Q
What movements is the intermediate gray responsible for?
A
Gross, rapid movement
6
Q
Where are the synapses of the CST?
A
Mainly in the ventral horn
7
Q
What levels is the ventral horn larger at and why?
A
C8 - brachial plexus
L3 - lumbosacral plexus
