Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Neuroscience🧠 > Somatosensory I > Flashcards

Somatosensory I Flashcards

1
Q

Exteroceptors sense…

A

touch, pressure, vibration, pain, and temperature from outside stimuli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Proprioceptors sense

A

stimuli from muscles, tendons, and joint capsule about our limb position and movement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Interoceptors sense…

A

stimuli from the viscera about internal changes in our body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Special sensory receptors sense…

A

our 5 senses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is sensory transduction?

A

Conversion stimulus energy into neural/electrical signals in primary afferents

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

An adequate stimulus is…

A. The minimum amount of a stimulus energy that must be present for the stimulus to be detected 50% of the time
B. The minimum about by which stimulus intensity must be changed in order to produce a just noticeable variation in sensory experience
C. Adequate stimulus for which the sensory receptor is particularly sensitive

A

C. Adequate stimulus for which the sensory receptor is particularly sensitive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

An adequate stimulus has a ____ threshold for activation and a ____ sensitivity to changes in intensity

A. high, low
B. low, high
c. high, high

A

B. low, high

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

An absolute threshold is

A. The minimum amount of a stimulus energy that must be present for the stimulus to be detected 50% of the time
B. The minimum about by which stimulus intensity must be changed in order to produce a just noticeable variation in sensory experience
C. Adequate stimulus for which the sensory receptor is particularly sensitive

A

A. The minimum amount of a stimulus energy that must be present for the stimulus to be detected 50% of the time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Just noticeable difference is…

A. The minimum amount of a stimulus energy that must be present for the stimulus to be detected 50% of the time
B. The minimum about by which stimulus intensity must be changed in order to produce a just noticeable variation in sensory experience
C. Adequate stimulus for which the sensory receptor is particularly sensitive

A

B. he minimum about by which stimulus intensity must be changed in order to produce a just noticeable variation in sensory experience

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

T/F: receptor potentials are graded potentials that hyperpolarize the current

A

False… receptor potentials are graded potentials that depolarize (less negative) the current

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are receptive fields?

A

an area of the skin where stimulation results in a significant change in rate of action potentials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

T/F: receptive fields can vary in size and shape and is dependent on the amount of receptors in the area

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The ____ the receptive field, the _____ the area of cortical representation

A. bigger, bigger
B. smaller, bigger
C. bigger, smaller
D. smaller, smaller

A

B. smaller, bigger
C. bigger, smaller… this is an inverse relationship

Ex) the digits have small receptive fields with lots of receptors.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How does the nervous system encode intensity?

A

frequency (rate of action potentials) and population (# of receptors) coding

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is top down processing?

A

Interpretation of sensation that is influenced by thoughts and past experiences

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is bottom-down processing?

A

Perception built from sensory input

17
Q

Sensory gating is…

A. Assigning sensory inputs in a way where more reliable inputs are assigned a greater weight
B. Filtering out relevant sensory cue’s vs “irrelevant” or “redundant”
C. The ability of the brain

A

B. Filtering out relevant sensory cue’s vs “irrelevant” or “redundant”

18
Q

Sensory weighting is…

A. Assigning sensory inputs in a way where more reliable inputs are assigned a greater weight
B. Filtering out relevant sensory cue’s vs “irrelevant” or “redundant”
C. The ability of the brain

A

A. Assigning sensory inputs in a way where more reliable inputs are assigned a greater weight

19
Q

The Posterior Columns Medial Lemniscus System carries…

A. Discriminative touch, pressure, vibration, and proprioceptive info from the body to the cortex
B. Discriminative touch, pressure, vibration, and proprioceptive info from the face to the cortex
C. Pain and temperature information from the body to the cortex

A

A. Discriminative touch, pressure, vibraton, and proprioceptive info from the body to the cortex

20
Q

T/F: The cuneate fasiculi carries information from the lower limb

A

False, it carries information from the upper limb

  • The gracile fasiculus carries information from the lower limb
21
Q

At what level does the PCMLS cross?

A

The medulla

22
Q

The trigeminal system will cross in the…

A

Pons

23
Q

The principal sensory nucleus relays information about…

A. conscious awareness
B. unconscious awareness

A

A. conscious awareness

24
Q

T/F: The mesencephalic nuclei carry proprioceptive/kinesthetic information

A

True

25
Q

Which of the following are surface mechanoreceptors?

A. Pacinian corpuscle
B. Merkel Cell
C. Hair Follicles
D. Meissner’s corpuscle
E: Ruffini corpuscle

A

B. Merkel Cell & D. Meissner’s corpuscle

26
Q

Which of the following are deep mechanoreceptors?

A. Pacinian corpuscle
B. Merkel Cell
C. Hair Follicles
D. Meissner’s corpuscle
E: Ruffini corpuscle

A

A. Pacinian corpuscle, C. Hair Follicles, E: Ruffini corpuscle

27
Q

Which of the following are rapidly adapting receptors?

A. Pacinian corpuscle
B. Merkel Cell
C. Hair Follicles
D. Meissner’s corpuscle
E: Ruffini corpuscle

A

A. pacinian corpuscle
C. hair follicles
D. meissner’s corpuscle

28
Q

Which of the following are slowly adapting receptors?

A. Pacinian corpuscle
B. Merkel Cell
C. Hair Follicles
D. Meissner’s corpuscle
E: Ruffini corpuscle

A

B. Merkel cells
E. Ruffini corpuscle

29
Q

Which of the following detects tapping & flutter movement in non-hair skin?

A. Pacinian corpuscle
B. Merkel Cell
C. Hair Follicles
D. Meissner’s corpuscle
E: Ruffini corpuscle

A

D. Meissner’s corpuscle

30
Q

Which of the following receptors detects discriminative touch, localization of touch, and determining object characteristics?

A. Pacinian corpuscle
B. Merkel Cell
C. Hair Follicles
D. Meissner’s corpuscle
E: Ruffini corpuscle

A

B. Merkel Cell

31
Q

Which of the following receptors senses deep pressure and vibration?

A. Pacinian corpuscle
B. Merkel Cell
C. Hair Follicles
D. Meissner’s corpuscle
E: Ruffini corpuscle

A

A. Pacinian corpuscle

32
Q

Which receptor senses skin stretch?

A. Pacinian corpuscle
B. Merkel Cell
C. Hair Follicles
D. Meissner’s corpuscle
E: Ruffini corpuscle

A

E. Ruffini corpuscle

33
Q

Which receptor senses movement (direction and velocity of movement)?

A. Pacinian corpuscle
B. Merkel Cell
C. Hair Follicles
D. Meissner’s corpuscle
E: Ruffini corpuscle

A

C. Hair follicles

34
Q

What group of fibers has the fastest conduction speed and thickest diameter?

A. group Ia and group Ib
B. group II
c. group III
d. group IV

A

A. group Ia and group Ib

35
Q

T/F: the primary somatosensory cortex is somatotopically organized, but it can reorganize in response to experience and injury

A

True

36
Q

If a patient experiences a left ACA stroke… what somatosensory deficits would they experience?

A
  • Loss of discriminative touch, pressure, vibration, and proprioception impacting the right lower limb
  • The right UL and face remain in tact
37
Q

If a patient experiences a right ACA stroke… what somatosensory deficits would they experience?

A
  • Loss of discriminative touch, pressure, vibration, and proprioception impacting the left lower limb
  • The light UL and face remain in tact
38
Q

If a patient experiences a left MCA stroke… what somatosensory deficits would they experience?

A
  • Loss of discriminative touch, pressure, vibration, and proprioception impacting right upper limb and face
  • Right lower limb remains intact.
39
Q

If a patient experiences a right MCA stroke… what somatosensory deficits would they experience?

A
  • Loss of discriminative touch, pressure, vibration and proprioception impacting the left upper limb and face
  • Left lower limb stays intact

Neuroscience🧠 (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions