Brainscape's Knowledge GenomeTM

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


See full index

Neuroscience 111 > Touchy Fili > Flashcards

Touchy Fili Flashcards

1
Q

What is the somatic sensation responsible for?

A

Touch, itch, pain

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

What are the two major subsystems of somatic sensation?

A

Mechanosensory (touch and body position) and temp & pain

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

What are sensory called? (In regards to polarity)

A

Pseudounipolar (looks kind of like a sentry gun with the head being the soma)

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

Where are the cell bodies of sensory neurons?

A

Dorsal root ganglion

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

What are the four receptor groups based on function?

A

Mechanoreceptors, nociceptors, pruriceptors, & thermoceptors

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

What are mechanoreceptors in charge of?

A

Touch

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

What are nociceptors in charge of?

A

Pain

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

What are pruriceptors in charge of?

A

Itch

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

What are thermoreceptors in charge of?

A

Temperature

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

What are the two groups of receptors based on morphology?

A

Free nerve endings and encapsulated

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

What are some characteristics of free nerve endings?

A

They are unmyelinated terminal branches and they consist of nociceptors and thermoreceptors

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

What are some characteristics of Encapsulated types of receptors?

A

They are myelinated and are only mechanoreceptors for touch

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

What is the sensory transduction pathway?

A

Stim deforms skin -> receptor membrane permeability is altered -> depolarization occurs -> AP is triggered

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

What determines the QUALITY of the stimulus?

A

Types of receptors that are activated

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

What determines the QUANTITY of stimulus?

A

The rate of AP discharge&raquo_space;> adaptation

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

What are mechanoreceptors sensitive to?

A

Physical distortion

17
Q

How sensitive are mechanoreceptors in the skin?

A

Extremely (low threshold)

18
Q

Which mechanoreceptors have small receptive fields?

A

Meissner’s corpuscles and Merkel’s disks

19
Q

Which mechnoreceptors have large receptive fields?

A

Pacinian corpuscles and Ruffini’s endings

20
Q

Which mechanoreceptors rapidly adapt? (Aka quick cease fire)

A

Messneir and Pacinian corpuscles

21
Q

Which mechanoreceptors have slow adaptation? (Sustained response as long as stim remains)

A

Merkel’s disk and ruffini’s endings

22
Q

When do Pacinian corpuscles have the largest receptor potential?

A

Onset and offset (basically when you touch and then u untouch)

23
Q

What are the three types of mechanosensitive ion channels?

A

Lipid membrane stretch sensitive, extracellular protein force sensitive, cytoskeleton force sensitive

24
Q

Why do fingertips have the most spatial resolution?

A
  • Higher density of mechanoreceptors
  • More Merkel’s disks
  • More brain tissue is devoted to it
  • Special neural mechanisms are devoted to high res discriminations

Neuroscience 111 (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions