Lec 12 Flashcards
1
Q
What is mechanotransduction
A
process where mechanical en (e.g. tissue deformation) get converted to voltage change in sensory afferent neurons
2
Q
What is a cutaneous receptive field
A
region of skin that can drive response in certain neuron
3
Q
how are skin receptors classified
A
based on receptive field size and response to sustained stimulation.
4
Q
What are the 4 glaborous skin receptors?
A
- Meissner’s corpuscle
- Merkel cells
- Ruffini endings
- Pacinian corpuscles
5
Q
Meissner’s corpuscle
A
- grip control and skin motion (hold beer)
- feel how slippery smtg is
- FA1
- velocity of skin motion and indentation
- low threshold
- sensitive to low vibration
6
Q
Merkel cells
A
- tactile discrimination (feel coin in pocket)
- SA1
- sensitive to edges and curves
- irregular discharge
- fine detail detection
- low threshold
7
Q
Ruffini endings
A
- hand and finger position and stretch (grip a dumbell)
- SA2
- skin stretch and pull
- input about hand shape and movement
- high threshold
8
Q
Pacinian corpuscles
A
- rapid vibrations (feel with blind stick)
- FA2
- changes of acceloration in indentation and start/stop of touch
- high frequency vibrations
- extremely low threshold
9
Q
Which types of receptors detect slipping of objects
A
FAII and SAI (why saI?) respond to microslips. FAI respond to how slippery surface is (increased slippery = increased activity)
