Question 1

Describe how surface roughness seems to be registered by the nervous system.

Accepted Answer

Surface roughness is registered by the nervous system through the process of mechanoreception. Mechanoreceptors in the skin, such as Meissner's corpuscles and Merkel cells, are responsible for detecting tactile stimuli, including changes in surface roughness. When an object with a rough surface comes into contact with the skin, the mechanoreceptors in the skin are activated. These receptors then convert the mechanical stimuli into electrical signals that are transmitted to the brain via the nervous system.

The brain processes these electrical signals and interprets them as the perception of roughness. Different types of mechanoreceptors are specialized to detect and transmit specific types of tactile information, such as texture and fine details. This allows the nervous system to differentiate between different levels of surface roughness and accurately perceive the tactile qualities of objects.

Overall, the nervous system registers surface roughness through the activation and transmission of signals from mechanoreceptors in the skin, leading to the perception of tactile stimuli as rough or smooth.

Question 2

Sensitivity to very light touch is probably mediated by

Accepted Answer

A)  SA fibers. 
B)  RA fibers. 
C)  ulnar nerve. 
D)  none of these 
A)  SA fibers. 
B)  RA fibers. 
C)  ulnar nerve. 
D)  none of these B

Question 3

A weight that has been cooled feels

Accepted Answer

A)  lighter than the same weight does at room temperature. 
B)  heavier than the same weight does at room temperature. 
C)  no different from the same weight at room temperature. 
D)  cooler than the same weight does at room temperature 
A)  lighter than the same weight does at room temperature. 
B)  heavier than the same weight does at room temperature. 
C)  no different from the same weight at room temperature. 
D)  cooler than the same weight does at room temperature B

Question 4

The research-based touch rehabilitation therapy developed by Dannenbaum and Dykes (1988) uses the strategy of

Accepted Answer

A)  reeducating one component of touch at a time. 
B)  having patients wear blindfolds to emphasize touch perception. 
C)  teaching Braille visually before relying on touch. 
D)  using touch to enhance visual perception. 
A)  reeducating one component of touch at a time. 
B)  having patients wear blindfolds to emphasize touch perception. 
C)  teaching Braille visually before relying on touch. 
D)  using touch to enhance visual perception.

Question 5

The _________ is to the body as the ________ is to the eye.

Accepted Answer

A)  hand, fovea 
B)  thumb, cornea 
C)  mind, lens 
D)  skin, retina 
A)  hand, fovea 
B)  thumb, cornea 
C)  mind, lens 
D)  skin, retina

Question 6

Degree of loss of touch sensitivity to small probes with age correlates well with

Accepted Answer

A)  increase in skin callousness. 
B)  decrease in the number of Meissner corpuscles. 
C)  increased skin elasticity. 
D)  cell loss in cortical area SI. 
A)  increase in skin callousness. 
B)  decrease in the number of Meissner corpuscles. 
C)  increased skin elasticity. 
D)  cell loss in cortical area SI.

Question 7

Which of the following is NOT believed to influence the perceived temperature of an object?

Accepted Answer

A)  skin temperature 
B)  the hardness of a surface 
C)  the temperature of the object 
D)  all of these affect the perceived temperature of an object 
A)  skin temperature 
B)  the hardness of a surface 
C)  the temperature of the object 
D)  all of these affect the perceived temperature of an object

Question 8

The term haptics refers to

Accepted Answer

A)  thermal transfer between the skin and a surface. 
B)  disuse of a hand following brain damage. 
C)  active exploration of objects by the hands. 
D)  a method of reading employed by blind people. 
A)  thermal transfer between the skin and a surface. 
B)  disuse of a hand following brain damage. 
C)  active exploration of objects by the hands. 
D)  a method of reading employed by blind people.

Question 9

When we rub our hands together, we can be made to experience our hands as dry and rough by placing a microphone near our hands and

Accepted Answer

A)  amplifying the high-frequency sounds. 
B)  reducing the high-frequency sounds. 
C)  amplifying the low-frequency sounds. 
D)  reducing the low-frequency sounds. 
A)  amplifying the high-frequency sounds. 
B)  reducing the high-frequency sounds. 
C)  amplifying the low-frequency sounds. 
D)  reducing the low-frequency sounds.

Question 10

Explain how gate control theory explains perception of pain.

Accepted Answer

The gate control theory of pain percepti

Question 11

Touch acuity varies with

Accepted Answer

A)  the region of the body touched. 
B)  the sex of the person being touched. 
C)  temperature of the skin. 
D)  all of these 
A)  the region of the body touched. 
B)  the sex of the person being touched. 
C)  temperature of the skin. 
D)  all of these

Question 12

Touch sensitivity to vibration is highest on the

Accepted Answer

A)  fingertips. 
B)  lips. 
C)  palm. 
D)  toes. 
A)  fingertips. 
B)  lips. 
C)  palm. 
D)  toes.

Question 13

The side of the hand containing the smallest finger is innervated by what nerve(s)?

Accepted Answer

A)  ulnar 
B)  median 
C)  both ulnar and median 
D)  neither ulnar nor median 
A)  ulnar 
B)  median 
C)  both ulnar and median 
D)  neither ulnar nor median

Question 14

People who lose all large touch fibers from a viral infection

Accepted Answer

A)  find it almost impossible to walk. 
B)  cannot tell where a thermal probe is placed on the body. 
C)  experience phantom-limb pain. 
D)  all of these 
A)  find it almost impossible to walk. 
B)  cannot tell where a thermal probe is placed on the body. 
C)  experience phantom-limb pain. 
D)  all of these

Question 15

In what way(s) is registration and processing of tactile information comparable to registration and processing of visual information?

Accepted Answer

Registration and processing of tactile i

Question 16

When people explore objects with their hands, the hand movements are

Accepted Answer

A)  random. 
B)  predictable. 
C)  inaccurate. 
D)  slow. 
A)  random. 
B)  predictable. 
C)  inaccurate. 
D)  slow.

Question 17

Touch can be considered to be more reliable than vision because

Accepted Answer

A)  we tend to disbelieve an object exists if we feel it but cannot see it. 
B)  we tend to believe an object exists if we feel it but cannot see it. 
C)  we tend to believe an object exists if we see it but cannot feel it. 
D)  we tend to believe an object exists only if we can both see and touch it. 
A)  we tend to disbelieve an object exists if we feel it but cannot see it. 
B)  we tend to believe an object exists if we feel it but cannot see it. 
C)  we tend to believe an object exists if we see it but cannot feel it. 
D)  we tend to believe an object exists only if we can both see and touch it.

Question 18

People with pain insensitivity

Accepted Answer

A)  have lowered thresholds for pain. 
B)  have lowered life expectancy. 
C)  have fewer social interactions. 
D)  all of these 
A)  have lowered thresholds for pain. 
B)  have lowered life expectancy. 
C)  have fewer social interactions. 
D)  all of these

Question 19

The side of the hand containing the thumb and the outside portion of the arm are innervated by what nerve(s)?

Accepted Answer

A)  ulnar 
B)  median 
C)  both ulnar and median 
D)  neither ulnar nor median 
A)  ulnar 
B)  median 
C)  both ulnar and median 
D)  neither ulnar nor median

Question 20

In the case of touch, cortical magnification refers to the

Accepted Answer

A)  larger number of somatosensory cortical cells compared to mechanoreceptors. 
B)  larger cortical representation of larger body areas such as the back. 
C)  larger cortical representation of body parts with better tactile sensitivity, such as the fingers. 
D)  increase in size of tactile cortical receptive fields. 
A)  larger number of somatosensory cortical cells compared to mechanoreceptors. 
B)  larger cortical representation of larger body areas such as the back. 
C)  larger cortical representation of body parts with better tactile sensitivity, such as the fingers. 
D)  increase in size of tactile cortical receptive fields.

Describe how surface roughness seems to be registered by the nervous system.

Sensitivity to very light touch is probably mediated by

A weight that has been cooled feels

The research-based touch rehabilitation therapy developed by Dannenbaum and Dykes (1988) uses the strategy of

The _ is to the body as the is to the eye.

Degree of loss of touch sensitivity to small probes with age correlates well with

Which of the following is NOT believed to influence the perceived temperature of an object?

The term haptics refers to

When we rub our hands together, we can be made to experience our hands as dry and rough by placing a microphone near our hands and

Explain how gate control theory explains perception of pain.

Touch acuity varies with

Touch sensitivity to vibration is highest on the

The side of the hand containing the smallest finger is innervated by what nerve(s)?

People who lose all large touch fibers from a viral infection

In what way(s) is registration and processing of tactile information comparable to registration and processing of visual information?

When people explore objects with their hands, the hand movements are

Touch can be considered to be more reliable than vision because

People with pain insensitivity

The side of the hand containing the thumb and the outside portion of the arm are innervated by what nerve(s)?

In the case of touch, cortical magnification refers to the

Introduction to Perception

The Human Eye

The Eye and Seeing

Central Visual Pathways

Spatial Vision and Patten Perception

Object Perception: Recognizing the Things We See

Color Perception

Seeing a Three-Dimensional World

Action and the Perception of Events

The Ear and Auditory System

Hearing and Listening

Speech and Music Perception

Chemical Senses L: Smell

Chemical Senses Ll: Taste

Filters

Exam 13: Touch

Describe how surface roughness seems to be registered by the nervous system.

Sensitivity to very light touch is probably mediated by

A weight that has been cooled feels

The research-based touch rehabilitation therapy developed by Dannenbaum and Dykes (1988) uses the strategy of

The _________ is to the body as the ________ is to the eye.

Degree of loss of touch sensitivity to small probes with age correlates well with

Which of the following is NOT believed to influence the perceived temperature of an object?

The term haptics refers to

When we rub our hands together, we can be made to experience our hands as dry and rough by placing a microphone near our hands and

Explain how gate control theory explains perception of pain.

Touch acuity varies with

Touch sensitivity to vibration is highest on the

The side of the hand containing the smallest finger is innervated by what nerve(s)?

People who lose all large touch fibers from a viral infection

In what way(s) is registration and processing of tactile information comparable to registration and processing of visual information?

When people explore objects with their hands, the hand movements are

Touch can be considered to be more reliable than vision because

People with pain insensitivity

The side of the hand containing the thumb and the outside portion of the arm are innervated by what nerve(s)?

In the case of touch, cortical magnification refers to the

Introduction to Perception

The Human Eye

The Eye and Seeing

Central Visual Pathways

Spatial Vision and Patten Perception

Object Perception: Recognizing the Things We See

Color Perception

Seeing a Three-Dimensional World

Action and the Perception of Events

The Ear and Auditory System

Hearing and Listening

Speech and Music Perception

Chemical Senses L: Smell

Chemical Senses Ll: Taste

Filters

The _ is to the body as the is to the eye.