Adaptive & Nonadaptive Fibres

Created by

Hiri P

Cards (4)

Adaptive & Nonadaptive Fibres pt1:
Type 1A afferents have annulospiral endings on the dynamic bag fibres, static bag fibres and the chain fibres
so there will be action potentials being generated from the nonadaptive fibres and the adaptive fibres travelling up the axon - communicates a combination of both adaptive and nonadaptive action potentials
Adaptive & Nonadaptive Fibres pt2:
from the adaptive fibres there will be action potentials travelling up this afferent at a frequency proportionate to the speed at which the muscle has been lengthened
from the nonadaptive fibres there will be action potentials travelling up this afferent at a frequency proportionate to the length of a muscle
Type 1A afferents carry both of these action potentials/information about speed of lengthening and length to the CNS
Adaptive & Nonadaptive Fibres diagram pt1:
diagram, shows the frequency of action potentials generative by adaptative and nonadaptive fibres whilst a muscle is being lengthened and shortened over a period of time
when in a shortened position, there'll be low frequency of action potentials coming from the nonadaptive fibres
when muscles lengthening, there'll be a higher frequency of action potentials from the nonadaptive fibres and there will be a burst of action potentials, proportionate to speed of lengthening, from the adaptive fibres, before the dynamic bag change shape to reduce tension
Adaptive & Nonadaptive Fibres diagram pt2:
diagram, shows the frequency of action potentials generative by adaptative and nonadaptive fibres whilst a muscle is being lengthened and shortened over a period of time
when lengthening stops, the adaptive fibres stops input of action potentials, but adaptive fibres still prove action potentials, now at a high frequency due to muscle length being larger
when muscle shortens again there'll just be low frequency of action potentials coming from the nonadaptive fibres