propriception Flashcards
what is proprioception
the sense of the relative position of neighboring arts of the body
joint capsule recptors - 4
golgi tendond, paciniform,ruffini, free nerve endings in jc
muscle spindles consist of what
muscle fibres in a capsule
muscle spindles are where
in parallel muscle with main extrafusal msucle
do muscle spindles generate useful force
no
what is wrapped about muscle spindles for muscle stretch detection
sensory axons
gamma motor neurones cause active
contraction of muscle spindle
what do m spindles detect
static muscle length and rate of change in muscle stretch and surrounding muscle stretch
joint angles can be calculated from changes in muscles length signaled by
spindles
how many spindles in soelus muscle
400
what are the 2 types of endings for spindles
primary and secondary
what is a primary ending spindle
signal position and velocity - transmitted via 1a afferents - sensitive to vibrations
what is the secondary muscle ending spindle
position only via group 2 afferents -
what are gamma fibres
contractile element of spindle - no useful force - just keep spindle taught
main muscle with alpha neurons causes muscles to
slacken - dropping firing rate and lose sensitivity