sensory system Flashcards
4 key layers
modality
intensity
duration
location
tonic
on for how long the signalling is on
phasic
on signal then off signal
touch A beta fibres
merkel
meissner
pacinian
ruffini
receptive field
area of skin surface over which stimulation results in change in rate of AP
size of receptive field is determined by
number of receptors and branching
the smaller the receptive field the
greater the spacial acuity, the lower the 2-point discrimination threshold
body
after crossing of the dorsal horn what happens
assends to the thalamus via
anterolateral system
body
how does the motor signal come down
and where does it cross back over
via dorsal column medial lemniscal system
crosses over at the sensory decussation
merkel meissner pacinian ruffini where are they found
epidermis
pit in the epidermis
subcutaneous
dermis
merkel meissner pacinian ruffini phasic or tonic
phasic
tonic
phasic
tonic
merkel meissner pacinian ruffini slow or fast and vibration or pressure
fast vibration
slow pressure
fast vibration
slow pressure
