motor function Flashcards
motor neurons: summarise the organisation of alpha motor neurons within the spinal cord
1
Q
what are alpha motor neurones and where are they located
A
lower motor neurones of brainstem and ventral horn of spinal cord
2
Q
what do alpha motor neurones innervate
A
extrafusal muscle fibres of skeletal muscles (gamma are intrafusal)
3
Q
what does alpha motor neurone activation cause
A
contraction
4
Q
what does the motor neurone pool contain
A
all alpha motor neurones innervating a single muscle
5
Q
functional mapping of 4 alpha motor neurone pools in grey matter of ventral horn: medial, lateral, dorsal and ventral
A
medial: proximal; lateral: distal; dorsal: flexors; ventral: extensors
