propriception Flashcards

1
Q

what is proprioception

A

the sense of the relative position of neighboring arts of the body

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2
Q

joint capsule recptors - 4

A

golgi tendond, paciniform,ruffini, free nerve endings in jc

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3
Q

muscle spindles consist of what

A

muscle fibres in a capsule

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4
Q

muscle spindles are where

A

in parallel muscle with main extrafusal msucle

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5
Q

do muscle spindles generate useful force

A

no

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6
Q

what is wrapped about muscle spindles for muscle stretch detection

A

sensory axons

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7
Q

gamma motor neurones cause active

A

contraction of muscle spindle

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8
Q

what do m spindles detect

A

static muscle length and rate of change in muscle stretch and surrounding muscle stretch

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9
Q

joint angles can be calculated from changes in muscles length signaled by

A

spindles

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10
Q

how many spindles in soelus muscle

A

400

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11
Q

what are the 2 types of endings for spindles

A

primary and secondary

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12
Q

what is a primary ending spindle

A

signal position and velocity - transmitted via 1a afferents - sensitive to vibrations

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13
Q

what is the secondary muscle ending spindle

A

position only via group 2 afferents -

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14
Q

what are gamma fibres

A

contractile element of spindle - no useful force - just keep spindle taught

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15
Q

main muscle with alpha neurons causes muscles to

A

slacken - dropping firing rate and lose sensitivity

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16
Q

gamma activation contracts spindle which maintains

A

sensitivity

17
Q

muscle vibration causes

A

illusions of muscle stretch - position and velocity

18
Q

1a spindle afferent ….. fires to signal muscle length

A

continuously

19
Q

what are golgi tendons

A

proprioceptors, which are located in the tendon adjacent to myotendinous junction.

20
Q

where is the golgi tendon

A

in between the muscle and tendon

21
Q

what does a golgi tendon do

A

records tension

22
Q

when does a golgi tendon stretch

A

when a muscle contracts

23
Q

1b afferent axons becomes compressed by collagen fibres and its rate of fire..

A

increases

24
Q

what is the difference between golgi and spindle muscle twitch

A

difference on emg

25
Q

what happens to someone’s movement due to neuropathy

A

accuracy decreases in movement

26
Q

proprioception is highly sensitive for what

A

balance

27
Q

what is GVS

A

galvanic vestibular stimulation

28
Q

how is gvs interpreted

A

in the context of neck orientation

29
Q

what declines with age (body part) proprioception

A

ankle proprioception

30
Q

what is associated with falls

A

peripheral neuropathy

31
Q

spindles lie in what state

A

parallel

32
Q

what is necessary to maintain spindle sensitivity

A

alpha gamma coactivation

33
Q

golgi tendons detect what

A

force vai group 2 afferents

34
Q

sensory and force production capacities of muscle may be

A

interlinked