Brainscape's Knowledge GenomeTM

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


See full index

GBE > Somatosensory systems > Flashcards

Somatosensory systems Flashcards

1
Q

What are the somatosensory systems?

A

touch, proprioception, pain ,itch, visceral

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

What are the 2 classes of somatic sensory neurons?

A

dorsal root ganglion and trigeminal

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

What is the order of neuron fibre speed from slowest to fastest?

A

c < Ad < Ab

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

What are the properties of a stimulus?

A

modality
intensity
duration
location

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

What are slowly adapting receptors?

A
  • fire for duration of stimulus

- larger stimulus = increased frequency

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

What are rapidly adapting receptors?

A

only fire when there is a change in intensity of a stimulus

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

What is the receptive field?

A

the spatial domain where a stimulus will excite/inhibit a neuron

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

What is the two-point threshold?

A

the ability to distinguish two stimuli as separate

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

What are the 4 types of mechanoreceptors?

A
  • meissner corpuscle (superficial, small field, rapid adapting)
  • Merkel cells (superficial, small field, slow)
  • pacinian corpuscle (deep, large field, fast)
  • ruffini endings (deep, large field, slow)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What do proprioceptors do?

A

report on limb position

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

What do joint proprioceptors do?

A

transduce tension in the joint capsule

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

What are the 2 types of muscle receptors?

A

muscle spindles and golgi tendons

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

What are the features of muscle spindles?

A

in parallel with fibres

sense change in length

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

What are the features of golgi tendon bodies?

A

in series with fibres

sense tension changes

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

What type of fibres are cold fibres?

A

A delta

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

What type of fibres are hot fibres?

A

C fibres

17
Q

Why can high temperatures feel cold?

A

the cold receptors can become activated

18
Q

What receptors sense dangerous temperatures?

A

nocieptors

19
Q

What are the 4 main modalities of nocieptors?

A

thermal, mechanical, polymodal, silent (in inflammation)

20
Q

How is diversity of nocieptors determined?

A

expression of transduction molecules

21
Q

Is the dorsal column/ medial lemnisal system contralateral or ipsilateral?

A

ipsilateral

22
Q

What does the ascending dorsal column convey?

A

mechanosensory info from limbs and trunk

23
Q

is the anterolateral tract contralateral or ipsilateral?

A

ipsilateral (crosses midline in spinal cord)

24
Q

What does the ascending anterolateral tract convey?

A

itch, temperature, visceral ifno

25
Q

What are the 3 main divisions of the somatosemsory cortex?

A

primary cortex
secondary cortex
posterior parietal cortex

26
Q

What are the Broadmann’s areas?

A

subdivisions of the primary somatosensory cortex

- 1,2, 3a and 3b

27
Q

Which broadmann area gets the majority of input?

A

3b

GBE (12 decks)

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