Mechanoreception No2 Flashcards
what is mechanoreception
physiological process mechanical stimuli detected sometimes sensation of touch but some just feedback info proprioception
what is the purpose of a small receptive field
degree of fine perception - pixel analogy
what are the mechanoreceptors involved in intensity and duration and also velocity
Merkel cells
Ruffini
what type, receptive field nd adaption of merkel cells
SA I
small receptive field
slow adaptation
what type, receptive field and adaptation of ruffini cells
SA II
large receptive field
slow adapting
what mechanorectors roles
velocity
acceleration
vibration
meissner
Paccinian
what is the type, receptive field, adaptation of messier cells
RA I
small receptive field
rapd adaptation
what si the type, receptive field, adaptation of paccinian
RA II
large receptive field
rapid adaptive
what are PDLM’s aligned wth
collagen fibres
what are PDLM’s
ruffini ending deep, large receptive field and slow adapt
what do PDLM’s respond to
PDL tension
where is there more tension on the PDLM
moe tension at apex as move more
what d forces from the labile side of the tooth activate
from labile side only activate mechanoreceps with tension, palatal side
how sesntitve PDLM
very sensitive
small movements: 8.5uM
small forces:
what si the experiment to see fine motor control of PLDM
metal device between teeth
flexible bar peanut
transducer shows tension on peanut without breaking
without PDLM not able to have this fine control