motor function

Question 1

what are alpha motor neurones and where are they located

Answer 1

lower motor neurones of brainstem and ventral horn of spinal cord

Question 2

what do alpha motor neurones innervate

Answer 2

extrafusal muscle fibres of skeletal muscles (gamma are intrafusal)

Question 3

what does alpha motor neurone activation cause

Answer 3

contraction

Question 4

what does the motor neurone pool contain

Answer 4

all alpha motor neurones innervating a single muscle

Question 5

functional mapping of 4 alpha motor neurone pools in grey matter of ventral horn: medial, lateral, dorsal and ventral

Answer 5

medial: proximal; lateral: distal; dorsal: flexors; ventral: extensors