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Flashcards in Corticospinal Tract Deck (12):
1

Is corticospinal tract Sensory or motor?

Motor
Anterior and Lateral

2

Where does the pathway begin?

primary motor cortex (area 4) and the supplemental and premotor cortices (area 6)

3

Where does the Corticospinal tract decussate?

75 - 90% decussate in the medulla at the prymaids - These are the fibres that will innovate the limbs

The Anterior fibres Decussate at the spinal cord at point of exit

4

What is another name for the corticospinal tract?

Pyramidal tract

5

Where does the upper motor neuron of the corticospinal tract synapse?

Lower motor neurons of Anterior Horn of the grey matter in the spinal cord

6

What is the function of the Anterior Corticospinal Tract?

responsible for the conscious control of the proximal musculature

7

What is the function of the Lateral Corticospinal Tract?

responsible for the conscious control of the distal musculature
fine control of movements of the hand

8

Where does the lower motor neuron arise for the corticospinal tract?

Anterior horn

9

Where does the lower motor neuron go to?

The skeletal muscles

10

What is the corticobulbar tract responsible for?

Conscious control of the head and neck

11

What is the site of decussation for the corticobulbar tract?

Brain stem

12

Where is the destination for the corticobulbar tract?

Lower motor neurons of the cranial nerve nuclei in the brain stem