spinal cortex & motor cortex

Question 1

what is the motor unit?

Answer 1

group of skeletal muscle fibres & 1 somatic motor neuron that control them
composed of the motor neuron & all muscle cell that it innervates

Question 2

Motor neuron pool

Answer 2

Group of motor neurons that innervate a single muscle

The cell bodies of neurons in each pool are aggregated into cluster running lengthwise

Question 3

Lower motor neurons are located in__.

Answer 3

ventral spinal cord

Question 4

Sensory info ____ the spinal cord via ___

Answer 4

Enter; Dorsal root背部

Question 5

Motor neuron ___ the spinal cord via ___

Answer 5

Leaves; ventral root前部

Question 6

Extrafusal muscle fibres

Answer 6

normal contractile fibre

Question 7

Alpha motor neuron

Answer 7

Innervates extrafusal muscle fibre (contraction)

Question 8

Gamma motor neuron

Answer 8

Innervates intrafusal muscle fibre (contraction)

Question 9

Both alpha & gamma motor neuron

Answer 9

Give constant feedback about the length of our muscles during both muscle stretch and contraction

Question 10

Stretching muscle spinal/intrafusal muscle fibre

Answer 10

Infor send from muscle spindles to CNS via 1a afferent neurons

Question 11

Golgi Tendon Organ

Answer 11

Links muscle & tendon

Sensory receptor that sends info to the CNS about muscle tension