touch

Question 1

glabrous skin

Answer 1

what we use to touch
hairless skin

Question 2

what are mechanoreceptors innervated by?

Answer 2

large myelinated axons with cell
bodies in the dorsal root ganglia

Question 3

merkel

Answer 3

superficial, slow adapting
indentation

Question 4

meissener

Answer 4

superficial, fast adapting
skin movement (transient response)

Question 5

ruffini

Answer 5

deep, slow adapting
sustained to skin movement

Question 6

why four mechanoreceptors?

Answer 6

detect subtle differences

Question 6

pacinian

Answer 6

deep, fast adapting
vibration

Question 7

slow adapting

Answer 7

continuous report
less common

Question 8

fast adapting

Answer 8

stop reporting
more common

Question 9

fingertips & 2 pt discrimination

Answer 9

small two point discrimination, short distance between points still detected as two because small rf

Question 10

touch is how fast?

Answer 10

2nd fastest

Question 11

free nerve endings

Answer 11

pain & temperature

Question 12

mechanoreceptor pathway to brain

Answer 12

dorsal root -> brainstem -> medulla -> dorsal column nuclei (2nd neuron) -> thalamus -> 3rd neuron -> smc on cerebral cortex

Question 13

VPL

Answer 13

transfers info about somatosensation