PNS Flashcards
1
Q
receptors found in:
A
- skin
- joints
- tendons
- muscles
2
Q
free nerve endings
A
primarily pain sensory and temperature
3
Q
follicular endings
A
follicles of hair, will sense light touch
4
Q
merkel’s disks/cells
A
sense vertical pressure, high concentration of these in our fingertips, helps us localize touch
5
Q
meissner’s corpuscles
A
sense lateral pressure
6
Q
Ruffini’s endings/corpuscles
A
responsible for deep pressure and stretching of the skin
7
Q
pacinian corpuscles
A
deepest sensory receptors, sensing vibration
8
Q
GTO (Golgi tendon organs)
A
- sense tension
- both active and passive tension
- play a role in proprioception
9
Q
muscle spindles
A
muscle fibers with sensory tissue around them, they sense stretch
10
Q
intramural fibers
A
contractile fibers found inside of the muscle spindle
11
Q
extrafusal fibers
A
contractile fibers outside of the muscle spindle
12
Q
1a sensory nerve
A
- large
- 120 m/s
- function: spindle afferents
13
Q
1b sensory nerve
A
- large
- 120 m/s
- function: GTO afferents
14
Q
II sensory nerves
A
- medium diameter
- 70 m/s
- touch, pressure
15
Q
III sensory nerve
A
- small diameter
- 15 m/s
- function: pain, temperature
