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
gamma activation contracts spindle which maintains
sensitivity
muscle vibration causes
illusions of muscle stretch - position and velocity
1a spindle afferent ….. fires to signal muscle length
continuously
what are golgi tendons
proprioceptors, which are located in the tendon adjacent to myotendinous junction.
where is the golgi tendon
in between the muscle and tendon
what does a golgi tendon do
records tension
when does a golgi tendon stretch
when a muscle contracts
1b afferent axons becomes compressed by collagen fibres and its rate of fire..
increases
what is the difference between golgi and spindle muscle twitch
difference on emg
what happens to someone’s movement due to neuropathy
accuracy decreases in movement
proprioception is highly sensitive for what
balance
what is GVS
galvanic vestibular stimulation
how is gvs interpreted
in the context of neck orientation
what declines with age (body part) proprioception
ankle proprioception
what is associated with falls
peripheral neuropathy
spindles lie in what state
parallel
what is necessary to maintain spindle sensitivity
alpha gamma coactivation
golgi tendons detect what
force vai group 2 afferents
sensory and force production capacities of muscle may be
interlinked
