Motor Tracts

Question 1

Rubrospinal Tract:

Answer 1

Origin: red nucleus of midbrain
Decussation: midbrain
Termination: anterior grey horn
Function: regulation of flex-extensor tone

Question 2

tectospinal tract

Answer 2

Origin: superior colliculus of midbrain
Decussation: midbrain
Termination: anterior grey horn of spinal cord cervical region ONLY
Function: postural movements of head in response to visual and auditory stimuli

Question 3

Lateral Vestibulospinal Tract

Answer 3

Origin: Lateral vestibular nucleus of the medulla
Decussation: remains ipsilateral
Termination: anterior grey horn
Function: postural stabilization

Question 4

Retoculospinal Tact

Answer 4

Origin: reticular formation of pons and medulla
Decussation: Pontine remains ipsilateral and medullary has both crossed and uncrossed
Termination: anterior grey horn of spinal cord
Function: muscle tone, balance, postural changes