Descending Motor Pathways

Question 1

Corticospinal tract

Answer 1

Part of primary motor cortex that crosses in the Mendola (Pyramidal decussation) important for voluntary motor control

Question 2

Vestibulospinal track

Answer 2

Important for control of muscle tone antigravity muscles and postural reflexes. ipsilateral gross postural adjustments subsequent to head movements; facilitating activity of the extensor muscles and inhibiting activity of the flexor muscles

Question 3

Rubrospinal track

Answer 3

responsible for motor input of gross postural tone, facilitating activity of flexor muscles, and inhibiting the activity of extensor muscles

Question 4

Which descending spinal pathways are extra pyramidal?

Answer 4

Vestibulospinal rubrospinal reticulospinal tectal spinal

Question 5

Which ascending spinal pathways are pyramidal

Answer 5

Medial & lateral corticospinal

Question 6

Reticulospinal system

Answer 6

responsible for facilitation or inhibition of voluntary and reflex activity through the influence on alpha and gamma motor neurons

Question 7

Tectospinal tract

Answer 7

contralateral postural muscle tone associated with auditory/visual stimuli