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Question 1

extrafusal fiber

Answer 1

provide the force of contraction, controlled by alpha motor neurons that form synapses with them.

Question 2

intrafusal fiber

Answer 2

detects change in muscle length, controlled by gamma motor neurons.

Question 3

Golgi tendon organ

Answer 3

Contains stretch receptors for tendons

Question 4

Monosynaptic stretch

reflexes

Answer 4

Control limb movements when weight is applied or removed quickly and maintain upright posture

Question 5

Ventromedial Corticospinal Tract

Answer 5

Direct, ipsilateral, goes to trunk and proxal muscles

Question 6

Dorsolateral Corticospinal Tract

Answer 6

Direct, contralateral, goes to distal limb muscles

Question 7

Dorsolateral Corticorubrospinal Tract

Answer 7

Indirect, stops at red nucleus, contralateral, goes to distal limb muscles

Question 8

Ventromedial Cortico-brain stem-spinal Tract

Answer 8

Indirect, stops at brainstem, ipsilateral, goes to trunk and proximal muscles

Question 9

Hierarchy of sensorimotor system

Answer 9

Sensorimotor association cortex–> Secondary motor cortex–> Primary motor cortex–> Brain stem motor nuclei

Question 10

Sensorimotor association cortex

Answer 10

Top of the hierarchy. 2 parts: posterior parietal association cortex (provides spatial information; receives visual-, auditory-, and the somatosensory information) and dorsolateral prefrontal association cortex