pacinian corpuscle

pressure sensitive

* causes the corpuscle to deform, the greater the pressure the more deformation
* causes the sodium channels to open
* sodium ions diffuse down the conc gradient
* this creates a generator potential

generator potential

* the result of depolarisation of the membrane
* if reaches the threshold value, an action potential will be transmitted

structure

single sensory neuron at the centre surrounded by layers of tissue

pacinian corpuscle

type of mechanoreceptor, found deep within skin and joints

stretch mediated sodium ion channels

* at resting state the channels are too narrow to allow Na+ to pass through
* when pressure is applied, changing shape of corpuscle the membrane changes shape, widening Na+ channels allowing Na+ to diffuse into neuron