Sensation (3) Flashcards
How many neurons does it take to transmit information to sensory cortex?
3 neuronal chain
1st order neuron
periphery
associated with receptor
cell body in DRG
central process enters spinal cord
Where does 1st order neuron synapse with 2nd order neuron?
in spinal cord
Where is the 3rd cell body located?
thalamus
Where does the 3rd order neuron project?
to cortex
What are cells that transduce “environmental interaction” to produce an AP?
receptors
Which receptors respond to DOMS (lactic acid accumulation)?
chemoreceptors
Which receptors respond to pressure/touch?
mechanoreceptors (mechanical deformation)
Which receptors respond to taste?
chemoreceptors
What rate do free nerve endings adapt?
slowly adapting
TONIC input
What rate do ruffini endings adapt?
slowly adapting
Which receptors are non-encapsulated?
Free nerve endings, ruffini endings, merkels disks, hair endings
What rate do Merkel’s disks adapt?
rapidly adapting
Which receptors are most receptive to fine touch and velocity of touch?
Merkel’s disks
MOST rapidly adapting receptor type?
pacinian corpuscles