Somatosensory system

Question 1

Discriminative Touch

Answer 1

(Fine Touch) - detailed info about location, shape, texture, and movement.

Question 2

Crude Touch

Answer 2

Touch with poor localization of where it came from. (don’t know where they got touched)

Question 3

Rapidly Adapting Response

Answer 3

Turn on and Off (one at initial stimulation, one at the ending of stimulation) (you can see changes of each action potential)

Question 4

Slow adapting response

Answer 4

Generator and action potentials remain firing but slowly taper off. (Does a poor job in reporting the changes of stimulus, does a great job reporting the intensity of a stimulus)

Question 5

Tonic Receptor

Answer 5

Slow adapting receptor
- better at coding the intensity of a stimulus

Question 6

Phasic Receptor

Answer 6

Rapid Adapting Receptor
- Detects onset and offset of a stimulus
- changes in stimulus intensity (strength) not duration.

Question 7

Meissner Corpuscle

Answer 7

Rapid adapting
- Encapsulated
- found in glabrous skin (hairless), dermal papillae near the surface of the skin.

Question 8

Merkel Cell

Answer 8

SLOW ADAPTING
Unencapsulated
- Good for sensing details in shape
- finger like protrusions, located in basal epidermis

Question 9

Pacinian Corpuscle

Answer 9

RAPID ADAPTING
Encapsulated
- Present in entire body, located in the subcutaneous tissue.
- respond best to vibration
- used to test for first signs of neuropathy.

Question 10

Ruffini Corpuscle

Answer 10

VERY SLOW ADAPTING
- found deep in the skin and other conn. tissue sites, the mouth.
- Most sensitive to skin stretch
- stretching the skin, stretches the collagen fibers, compressing the axon terminals

Question 11

Large Receptive Field

Answer 11

less sensitive to the location of the stimulus., (low spatial resolution)

Question 12

Small Receptive Field

Answer 12

More sensitive to the location of the stimulus. Ex. Finger Tips and Lips