week 8A (no week 7 reading week) Flashcards
what used to be considered a propioceptive sens but not anymore
vestibualr
kinesthesis involves ____ and proprioception is more ___
conscoiusness
reflexive
what are the 4 major contibutors to kinesthesis?
- sense of position and movement of the limbs
- sense of tension or force
- sense of effot/heaviness
- sensation of body image + psoture (where head in space + upright_
kinesthesis senses ___ and is ___ while propricoeption sense____ and is___
kinesthesis - movement and is conscou/behaviour
propriception = position and is reflexive/subconscious
what is proprioceptve afference
afferent signal by mechanoreceptors produced as consequnce of postion and movement of body parts and tension in msucles and joints
proprioceptive affernts are signals produced as. result of ___ and ___ of body parts and ___ in muscles and joints
postion + movement - tension in muscle and joints
what is ex-afference?
proprioceptive afference from external/unexpecyed force
what is an example of ex-affernce? What is it generated by>
genrated by proprioceptors -paige throw microphone at brian is his cutaneous mechano recptos sense the object hitting hiim
someone slaps me in the face
what is re-afference? example?
propcieptive afference response generated by our own movements - internal
holding a laser pointer and moving it - typing on computer
what are the two types of taks in proprioception assessment? what are each?
mathcing tasks and discrimination tasks
matching - comparing two limbs (simultaneous) or comparing limb to itself (successive)
deiscirimtion
- flecion vs extension - moved + how far
what is an example of a simulatnous matching task?
touching fingers with eyes closed
what is an example of a succesuve matching task?
Move the area then try to replicate angle after
what is an example of a dicrimination task
idnetifying bend in finger. light tough vs firm grip
name 4 sources of proprioception
- muscle spindles
- joint
- cutaneous
- GTO
msucl spindle detect ___ of a muscle while GOT detect ___ of a myscle
legnth + velocity vs tension/force
what 3 aspects of proprioception do joitns detect
pressure, force, joint position
what do cutanoues receptors detect in proprioception
length/belocity of skin stretch
movemnt onset/onset
all mechanorecptors contirbute to proptioception. True or false?
true
if prximal joint is extended myscle receptors are ___
engaed
if proximal joint is felxed mmuscler ecptors are __
disengaged
what recpetors are activetd if middle finger extended, unanesthetized
cutaneosu, joint, + muscle
what receptors i fmiddle finger is extended, anesthetized
only muscle
what receptors are in mdidle finger extended - joint anesthetized
cuteanous + muscle
what receptors in middle finger if finger flexed - unasthetized
cutaneous + joint
Middle finger flexed, joint anesthetized
only cutanous
when are only cutaneous recptors activated in the finger
joint is anasthetized + flexed
whn are both cutanous and joint receptors activated in the finger
joint is flexed - unastehertized
when are cutaneous + muscle reeceptors activated
joint extended - joint anesthetized
when are all receptors engaged
joint extended - unasthetized
when are onyl muscle receptors engaed
Middle finger extended, anesthetized:
tendon ___ in msucle spindles activates ___
tendon vibraitoin activates type IA afferents
tendon vibration = ____ illusion
example?
kinethetis
pinnovhio effect
What is the Pinocchio effect, what is it an example of, and what receptor does it involve
example of kinestheic illusion form tendon vibration
- msucle spindles
perspon toeuches nose (cutaneous sensation) while bicep is vibrated (arm exetension sensation) - gives illusion taht nose is growing
what is sensory dominance
Conflict arises and the brain chooses one sensation
over other sensory information
what is improtant for kinethetic illusion to work?
person cannot see the limb
give an example of sensory visual dominance
vibrate Achilles tendon in participant brace against wall - feel triceps surae lengthening - falling forward
true or false - after joint replacement - ther is a decrase in joint position sense
false
what effect does lignocain have on joint receptors ?
DECREASES sesnitivty +proprioception
what effect oees dextran have on joint receptor sensitivity
incrase sensitivity + proprioception score
what 2 chemicals showed that joint receptors have arole in proprioception
lignocaine
dextran
what affernet innervate ruffini receptors
SAIII (slowly adaptin type II) - dtect skin stretch
what detexts skin stervch
ruffini corpuscle receptors - slowdly adapting type II
fast adapting type I (FA1) - detect intiral repuchang in stretch lcoally
what afferents code for finger psotion?
SAII (rufffini)
fingeer flexion ____ discharge rates of ____ affernts
incrases discharge rate sof SAIII afferents
Finger extension ___ discharge of SAII afferents
decrease discharge rates
____ code for dinfe rposition wile ___ code for which joint is moving
SAII vs FAI
what do FA1 afferents innervate?
meissner corpuscles
do all propricoeptora have limtaitons?
yes
signals are ____ fomr how many proprioceptors?
ambiguosu from one propricoeptors
can motor command generate kinestehtic percdption in abscence of proprioception
likely not but maybe
- when aske dto flec/extend oculd eprcive flecion/extension without viision of hand
