somatosensory systems

Question 1

What are the four features of receptors?

Answer 1

1. Specificity
2. Sensitivity
3. Receptive field
4. Adaptation rate

Question 2

What are the three features of stimuli?

Answer 2

1. intensity
2. Duration
3. Location

Question 3

What is sensory transduction?

Answer 3

Transformation of environmental sensory input into electrical signal

Question 4

Name three superficial receptors.

Answer 4

1. Meissner Corpuscle
2. Merkel Disc
3. Free Nerve Ending

Question 5

Which brodman's area is pre and supplemental motor? 
A. 4
B. 3,1,&2
C. 6
D. 41,& 42

Answer 5

C. 6

4:primary motor
3,1,&2: primary sensory
41&42: primary auditory and auditory association

Question 6

Name three deep sensory receptors

Answer 6

Pacinian Corpuscle

Ruffini Ending

Hair Follicule

Question 7

This sensory receptor is superficial, has a low threshold, slow adaptation rate, small receptive field, and senses pressure

Answer 7

Merkel Disc

Question 8

This sensory receptor is deep, has a low threshold, slow adaptation rate and senses the stretch of skin and joint capsule

Answer 8

Ruffini Ending

Question 9

This receptor is deep , with a low threshold, rapid adaptation rate, large receptive field and senses deep touch and vibration (100-400Hz)

Answer 9

Pacinian Corpuscle

Question 10

This receptor is deep, with a low threshold, rapid adaptation rate and senses direction of input on skin and velocity

Answer 10

Hair follicle

Question 11

This superficial receptor has a low threshold, rapid adaptation rate, medium receptive field and senses touch, & vibration (<100Hz)

Answer 11

Meissner Corpuscle

Question 12

This superficial receptor slowly adapts, connects to a slow conducting fiber, has a high threshold, large receptive field and senses touch, pressure, temperature, & pain

Answer 12

Free nerve ending

Question 13

Tactile input describes which six sensations

Answer 13

Pressure, touch, vibration, temperature, pain, & skin stretch

Question 14

Proprioception provides information about …

Answer 14

1. POSITION- of the body, head, and limbs
2. LENGTH- of muscle (muscle spindles)
3. TENSION and FORCE- of muscle (Golgi tendon organ)
4. RATE,TIMING &SEQUENCING of movements

Question 15

Joint receptors include which three tactile receptors?

Answer 15

Free nerve endings

Ruffini endings

Pacinian corpuscles

Question 16

Which type of fiber do you find muscle spindles?

Intrafusal or extrafusal

Answer 16

Intrafusal

Question 17

What sensations do joint receptors sense?

Answer 17

Pain, stretch, & Pressure

Question 18

What sensation do muscle spindles sense?

Answer 18

Changes in length

Question 19

T/F

Muscle spindles are must numerous in skilled muscle

Answer 19

True