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Neuro > Unit 2: Exteroception > Flashcards

Unit 2: Exteroception Flashcards

1
Q

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

A

2; 1

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2
Q

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

A

VPL thalamus

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3
Q

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

A

PDE; cGMP

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4
Q

L2: _____-adapting fibers sense steady touch.

A

Slowly

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5
Q

L2: _____-adapting fibers sense vibration.

A

Rapidly

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6
Q

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

A

Medial Geniculate Nucleus

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7
Q

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

A

Direction and orientation

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8
Q

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

A

Shape

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9
Q

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

A

Muscle stretch receptors (proprioception)

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10
Q

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

A

Cutaneous receptors

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11
Q

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

A

frequency of action potentials

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12
Q

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

A

Rhodopsin; metarhodopsin; Transducin

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13
Q

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

A

1-retinal

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14
Q

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

A

receptor potential

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15
Q

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

A

I and II

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16
Q

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

A

V

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17
Q

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

A

VI

18
Q

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

A

IV

19
Q

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

A

rapidly; small

20
Q

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

A

slowly; small

21
Q

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

A

Not relayed through the thalamus

22
Q

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

A

rapidly; large

23
Q

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

A

slowly; large

24
Q

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

A

Medial lemniscus

25
Q

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

A

caudal medulla

26
Q

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

A

Principal nucleus

27
Q

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

A

VPM thalamus

28
Q

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

A

Lateral Geniculate Nucelus

29
Q

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

A

Pacinian Corpuscles

30
Q

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

A

Meissner’s Corpuscles

31
Q

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

A

Ruffini Endings

32
Q

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

A

Merkel’s disks

33
Q

L2: Which skin receptors are rapidly-adapting?

A

Meissner’s Corpuscles, Pacinian Corpuscles

34
Q

L2: Which skin receptors are slowly-adapting?

A

Merkel’s disks, Ruffini Endings

35
Q

L2: Which skin receptors have large receptive fields?

A

Pacinian Corpuscles, Ruffini Endings

36
Q

L2: Which skin receptors have small receptive fields?

A

Meissner’s Corpuscles, Merkel’s disks

37
Q

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

A

A-alpha, A-beta

38
Q

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

A

Muscle/tendon afferent

39
Q

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

A

secondary muscle afferents, skin mechanoreceptors

40
Q

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

A

Sharp pain, cold temperature

41
Q

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

A

Warm temperature, burning pain, itch, crude touch

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