Sensory Nerve Fibers

Question 1

Only 1A sensory fibers are

Answer 1

stretch receptors called muscle spindles

Question 2

Sensory 1A contributes to the sense of

Answer 2

proprioception

Question 3

Movement with finesse requires constant __ data.

Answer 3

sensory input

Question 4

What are the largest and fastest sensory fibers?

Answer 4

1A

note: cell body housed in DRG

Question 5

Golgi tendon organ responds to

Answer 5

muscle tension changes

Question 6

Golgi tendon organ is innervated by

Answer 6

primary afferent called group 1B fibers

Question 7

Golgi tendon organ stretches cause collagen fibers to squeeze and distort the membranes of the

Answer 7

primary afferent sensory endings aka 1B fibers

Question 8

__ sensory fiber participate in body position (proprioception)

Answer 8

Type II (group Aα)

Question 9

Sensory Touch receptors are what type of fibers?

Answer 9

Type II (group Aβ)

Question 10

Under pathological conditions, Type II sensory fibers become “hyper-excitable” eliciting sensations of __ causing pain.

Answer 10

tactile touch

Question 11

Type II fibers are __ adapting

Answer 11

slow

Question 12

It is thought that the 1A fibers signal degree of change in muscle movement and the type II signal Length of muscle used to form __ of the body in space.

Answer 12

perception

Question 13

What fibers are responsible for the SENSORY portion of proprioception?

Answer 13

Class 1a, 1b and II

Question 14

Type Aδ aka Type III aka A Delta fibers are afferent fibers of

Answer 14

nociceptors

Question 15

Type Aδ aka Type III aka A Delta fibers carries information from Peripheral mechanoreceptors and Thermoreceptors to the ___.

Answer 15

dorsal horn (1st-order neuron pathway)

Question 16

What fiber receives and transmits information related to acute pain (sharp, immediate, relatively short-lived)?

Answer 16

Type Aδ aka Type III aka A Delta fibers

Question 17

What type of sensory fiber carries cold, pressure, and acute pain signals?

Answer 17

Type Aδ aka Type III aka A Delta fibers

Question 18

Are C fibers slow unmyelinated or fast myelinated nerve fibers?

Answer 18

slow unmyelinated

slow pain sensation

Question 19

__ fibers are considered polymodal (react to thermal, mechanical, chemical stimuli).

Answer 19

Type IV aka C fibers

Question 20

C fibers respond to what physiological changes?

Answer 20

hypoxia
hypoglycemia
hypo-osmolarity
m. metabolic products 
light or sensitive touch

Question 21

Which sensory fiber includes post-ganglionic ANS information at the dorsal roots?

Answer 21

Type IV or C fibers

Question 22

Nociceptors of the Anterior Spinothalamic tract and warmth receptors
are what type of sensory fibers?

Answer 22

Group C nerve fibers