Unit 2: Exteroception Flashcards Preview

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Flashcards in Unit 2: Exteroception Deck (41):
1

L1: Somatosensory Area ___ receives information from somatosensory Area __.

2; 1

2

L1: The second synapse for fibers in the medial lemniscal system occurs in the _____.

VPL thalamus

3

L1: Transducin activates a _______ to degrade _____ and close cation channels.

PDE; cGMP

4

L2: _____-adapting fibers sense steady touch.

Slowly

5

L2: _____-adapting fibers sense vibration.

Rapidly

6

L2: Auditory information is relayed through the _____ in the thalamus

Medial Geniculate Nucleus

7

L2: Brodmann's Area 1 and 2 contain fibers that are sensitive to _______.

Direction and orientation

8

L2: Brodmann's Area 2 fibers are distinctive in that they are _____-sensitive.

Shape

9

L2: Brodmann's Area 3a contains fibers from _______.

Muscle stretch receptors (proprioception)

10

L2: Brodmann's Area 3b contains fibers from ______.

Cutaneous receptors

11

L2: In long receptor cells, stimulus intensity changes the ______.

frequency of action potentials

12

L2: In rod cells, a conformational change in 1-retinal causes ______ to be converted to _______, which activates the G protein _________.

Rhodopsin; metarhodopsin; Transducin

13

L2: In rod cells, photons cause a conformation change in ______.

1-retinal

14

L2: In short receptor cells, stimulus intensity changes the _______.

receptor potential

15

L2: Layer __ of the cortex projects to other areas of the somatosensory cortex.

I and II

16

L2: Layer __ of the cortex projects to other subcortical areas

V

17

L2: Layer __ of the cortex projects to the thalamus.

VI

18

L2: Layer __ of the cortex receives input from the thalamus

IV

19

L2: Meissner's corpuscles are ______-adapting with a ______ receptive field.

rapidly; small

20

L2: Merkel's disks are ______-adapting with a ______ receptive field.

slowly; small

21

L2: Olfactory information is relayed through the _____ in the thalamus

Not relayed through the thalamus

22

L2: Pacinian corpuscles are ______-adapting with a ______ receptive field.

rapidly; large

23

L2: Ruffini endings are ______-adapting with a ______ receptive field.

slowly; large

24

L2: The fibers from the trigeminal lemniscal system join fibers from the medial lemniscal system in the ______.

Medial lemniscus

25

L2: The first synapse for fibers in the medial lemniscal system occurs in the ______.

caudal medulla

26

L2: The first synapse for fibers in the trigeminal lemniscal system occurs in the _____.

Principal nucleus

27

L2: The second synapse for fibers in the trigeminal lemniscal system occurs in the ______.

VPM thalamus

28

L2: Visual information is relayed through the ______ in the thalamus

Lateral Geniculate Nucelus

29

L2: What skin receptor is rapidly-adpating and has a large receptive field?

Pacinian Corpuscles

30

L2: What skin receptor is rapidly-adpating and has a small receptive field?

Meissner's Corpuscles

31

L2: What skin receptor is slowly-adpating and has a large receptive field?

Ruffini Endings

32

L2: What skin receptor is slowly-adpating and has a small receptive field?

Merkel's disks

33

L2: Which skin receptors are rapidly-adapting?

Meissner's Corpuscles, Pacinian Corpuscles

34

L2: Which skin receptors are slowly-adapting?

Merkel's disks, Ruffini Endings

35

L2: Which skin receptors have large receptive fields?

Pacinian Corpuscles, Ruffini Endings

36

L2: Which skin receptors have small receptive fields?

Meissner's Corpuscles, Merkel's disks

37

L2: Which types of fibers (A, C, etc.) are found in the medial lemniscal system?

A-alpha, A-beta

38

L3: What type of sensory information is transmitted by A-alpha fibers?

Muscle/tendon afferent

39

L3: What type of sensory information is transmitted by A-beta fibers?

secondary muscle afferents, skin mechanoreceptors

40

L3: What type of sensory information is transmitted by A-delta fibers?

Sharp pain, cold temperature

41

L3: What type of sensory information is transmitted by C fibers?

Warm temperature, burning pain, itch, crude touch