MC: Posture and Tone Flashcards
1
Q
Postural tone is due to which type of motor neuron?
A
alpha motor neurons
2
Q
Feed-forward adjustments use which tract?
A
reticulospinal tracts
3
Q
Feedback adjustments use which tract?
A
vestibulospinal tracts
4
Q
Why do we lean forward before we stand up?
A
put center of mass over support surface
5
Q
Which neurons do vestibulospinal tracts act upon?
A
alpha and gamma
6
Q
Which tract is normally active in maintaining posture?
Pontine reticular formation
Medullary reticular formation
A
Medullary pontine formation
Excited by cortex and inhibits gamma-motor neurons
