week 5A Flashcards
what are the 2 types of superficial cutaneous mechanoreceptors?
merkel cells + meisner corpuscle
what are the 2 deep cutaneous mechanoreeptore?
pacinian corpusl and ruffini endings
what % of hand does mekel cells inn?
25%
what % of hand do messner inn?
40%
what % of hand do ruffinin endings inn>
20%
what percentage of hand do pacinian corpuscle inn?
15%
what type of cutanous mechanorecepor inn the hand the most? the elat?
the most is the messner (40%)
the elast - pacinian (15%)
what type of A beta afferent inn
merkel cel
meissner cor
pacinina cor
ruffini
mekel - type I slowly adaptin
meis - type I fast adapting
pacin - type II slow adaptin
ruf - type II fast adapting
what is the fucntion of merkel cells?
deteect curvatere/edges of an object
what is the physiology (recept/hotpots) of merkel +meissner cells?
small densly packed receptive feileds, multple hot spots
what do meissner corpuscle fucntion?
stroking/velocity motion actoss kin
what is the physiology(recept/hotspots) of ruffini + pacinian
large rececptive field wiht one hot spot
what cutaneous emchanoreceptors has the lowest indentation thrshold?
pacininan corpuscle
what is the function of ruffini ednings
skin stretch - KT tape
what is teh function of pacinian
vibration - felling thru objects (braille?_
what cutaneous mechanoreceptors has teh highest threshold of indentaiton?
ruffinin endings - skin stretch
out of the two superficial cutaneous mechano receptors which has. a=lower threshold?
meissner lower than merkel (6 vs 30um)
out of th etwo deep cutaneous mechanoreceptors which has teh higher idnentaion thrshold?
ruffini (skin stretch) - has highest vs pacinian (lowst)
do u have to press hard to feel senation in merkel cells/
not rly - indentaiton threshol is moderate-low to feel edges/curvatere
a beverage slipping out of hand or anythign related to grip control woild inn what cutaneous mechanoreceptor?
meissner - detects velocity.stroking/motiona corss skin
putting socks on feet would be DTECTE DBY ____ cutaneous mechanoreceptors?
meissner
holding. a basketball would acivat e____ cutaous mechno recpto as the skin is stretching
ruffini endings
using a walking stick or reading braille would acgivate what cutanous mechanoreceptr?
pacinian corpuscle
why is there such a low threshol in pacninian corpuscle mechanorecptors?
it can allow us to detect diffences in texture (like readin braille or between 2 fabrics)
what mechanoreeptor is onion like depe within the skin?
pacinian
what are branched fibres within a cylindrical capsul?
ruffini
what type of cutaneous emchanorecpetors are disks?
meissner
what type of cut mech rec are cells wedges along the dermis?
merkel cells
meissner cells inn ___ % of the hand?
40
merkel cells have the most inn within the hand true or false?
false - meissner corpusle do
GO DO TABLE
