Question 1

The two-point threshold is smaller for the than for the .

Accepted Answer

A)  fingertips and lips;belly
B)  back and thighs;palm
C)  right side of the body;left side of the body A

Question 2

The semicircular canals

Accepted Answer

A)  are air-filled chambers in the head.
B)  signal head rotation.
C)  are found in the cerebral cortex. B

Question 3

SAII mechanoreceptors

Accepted Answer

A)  are slow adapting.
B)  have relatively small receptive fields.
C)  have Merkel cell endings. A

Question 4

The somatosensory cortex is found in

Accepted Answer

A)  the frontal lobe.
B)  the posterior parietal lobe.
C)  the anterior parietal lobe.

Question 5

The mechanoreceptors used to detect slip and to maintain grip on an object are the______________ mechanoreceptors.

Accepted Answer

A)  SAI
B)  SAII
C)  FAI

Question 6

Warm fibers fire at an ongoing moderate rate to sustained skin temperatures in the range of

Accepted Answer

A)  29-43°C.
B)  17-40°C.
C)  5-18°C.

Question 7

Neuropathic pain is caused by

Accepted Answer

A)  cutting of the skin.
B)  chemicals that are released by damage,causing activation of pain receptors.
C)  damage to the peripheral or central nervous system.

Question 8

Discriminative signals for pain are represented in

Accepted Answer

A)  the anterior insular cortex.
B)  areas 3b and 3a of S1.
C)  the amygdala.

Question 9

Describe the response of slow-adapting versus fast-adapting mechanoreceptors as you first pick up a mug and then place it down on your desk.

Accepted Answer

The answer of Describe the response of slow-adapting versus fast-adapting...

Question 10

Inflammatory pain and is caused by .

Accepted Answer

A)  occurs immediately;cutting of the skin.
B)  occurs after tissue has been damaged;chemicals that are released by damage,causing activation of pain receptors.
C)  occurs immediately;damage to the peripheral or central nervous system.

Question 11

Clarence has been playing guitar for fifteen years.After he fractured his left wrist,he found that he could no longer perform the fine finger movements required of his left hand.As a result,he decided to switch from playing right-handed to playing left-handed (strumming with his left hand while doing intricate fingering with his right).Describe (1)the current state of Clarence's somatosensory cortex,and (2)the changes you might expect Clarence to experience in his so- matosensory cortex over the next few years.(Assume Clarence is ambidextrous. )

Accepted Answer

The answer of Clarence has been playing guitar for fifteen...

Question 12

Tactile perception results from mechanical deformation,including the skin.

Accepted Answer

A)  indentation and temperature change to
B)  indentation and stretching of
C)  vibration and damage to

Question 13

C-tactile mechanoreceptors

Accepted Answer

A)  are found on glabrous skin.
B)  carry information quickly.
C)  are involved in the perception of pleasantness.

Question 14

Somatosensory signals carrying proprioceptive information flow from the ventral posterior nucleus of the thalamus to subarea(s)of S1.

Accepted Answer

A)  3b and 1
B)  3a and 2
C)  1

Question 15

______________ fibers transmit pain signals ,while fibers transmit pain signals .

Accepted Answer

A)  A-delta;slowly;C;rapidly
B)  A-delta;rapidly;C;slowly
C)  Unmyelinated A-delta;rapidly;myelinated C;slowly

Question 16

The confusion matrix for embossed letters moved across the fingertips showed that the letters were likely to be confused with one another.

Accepted Answer

A)  M and W
B)  A and B
C)  F and N

Question 17

One would think that pain receptors becoming more sensitive would be a great detriment,since this obviously leads to more frequent pain in the affected body part.What,then,is the benefit of increased sensitivity of nociceptors following injury?

Accepted Answer

The answer of One would think that pain receptors becoming...

Question 18

Proprioception results from the activity of

Accepted Answer

A)  muscle spindles.
B)  muscle spindles and Golgi tendon organs.
C)  muscle spindles,Golgi tendon organs,and joint receptors.

Question 19

Affective signals for pain are represented in all of the following except

Accepted Answer