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Brain and Behaviour 1 > Sensory System > Flashcards

Sensory System Flashcards

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1
Q

What are the 4 exteroceptive sensory systems

A

auditory
somatosensory
olfactory
gustatory

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2
Q

Define sensation

A

the process of detecting stimuli

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3
Q

Perception is

A

the higher order process of integrating, recognizing and interpreting patterns of sensations

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4
Q

sensory systems are

A

hierarchical

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5
Q

3 principles of sensory perception

A

functional segregation
system is not serial
parallel pathways, can skip levels

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6
Q

each level of cerebral cortex has functionally distinct areas of analysis

A

functional segregation

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7
Q

info flows over multple pathways in the neural network

A

parallel processing

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8
Q

amplitude is

A

loudness

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9
Q

frequency is

A

pitch

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10
Q

complexity is

A

timbre

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11
Q

pure tones are in our every day enviro

T/F?

A

Falsehoods

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12
Q

fundamental frequency of a sound is the

A

highest common divisor

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13
Q

basic pathway of sound perception

A

outer ear
tympanic membrane (ear drum)
Ossciles
Oval window
cochlea (snail)
Organ of Corti
Auditory nerve

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14
Q

name dem ossciles

A

Malleus (hammer)
Incus (anvil)
Stapes (stirrups

MIS
HAS

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15
Q

humans can parse out freq diffs of

A

.02%

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16
Q

the auditory pathway is a __ rather than a single __

A

network
major

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17
Q

the main stop between the primary auditory cortex and the ear is

A

the medial geniculate nuc of the thalamus

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18
Q

the Aud-cortex is organized

A

on a gradient of low to high on it’s length
temporal components of sound freq over time

PERIODOPOTY

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19
Q

Anterior audio pathway is

A

what and ID of sounds

20
Q

Posterior audio pathway is

A

where location

21
Q

audio and visual perception interact in the

A

posterior parietal cortex
PVC

22
Q

conductive deafness

A

damage to ossciles

23
Q

nerve deafness

A

damage to cochlea or aud nerve

24
Q

major cause of nerve deafness

A

hair cell receptor loss

25
Q

the layout of the auditory system is both

A

tonotopic and periodtopic

26
Q

the axons of the aud nerves synapse in the

A

ipsilateral cochlear nucelei

27
Q

many audio vis interactions are studied in the

A

post-parietal cor

28
Q

3 systems of the somatosensory cortex

A

exteroceptive (stim to skin)

Prioproceptive (muscles, location in space, balance)

Interoceptive (in ivivo, temp, BP, HR)

29
Q

Exteroceptive 3

A

mechanical
thermal
nociceptive

30
Q

name the 4 cutaneous receptors

A

free nerve ends (temp and pain)

Pancian Corpusclese (onion layered, fast, sudden skin displacement)

Merkels discs and Ruffini endings (adapt to slow constant pressure)

31
Q

two major somato pathways

A

Dorsal-column-medial lemniscus system (pain and temp)

Anterolateral system

32
Q

who mapped the somatosensory cortex?

A

Penfield

33
Q

the somato cortex is laid out

A

somatotopically

34
Q

largest section for the primary Somato cortex is for

A

hands, lips, tongue

35
Q

S1 is largely

A

contralateral

36
Q

S2 gets info from

A

both sides of body

37
Q

how are the streams of the somato pathways similar to aud and vis?

A

dorsal stream - multi-sensory integrations and direction of attention

and

ventral stream
perception of shapes

38
Q

a deficit in stereogenesis?

A

reduced ability to ID by touch

39
Q

Hemianopsia

A

a blind spot in visual field, losing detection of stim in that field. Hand in lap, low level, hand into vis field or holding object, much better

40
Q

Bimodal neurons for vis and somato are in

A

post-parietal

41
Q

: can’t ID by touch

A

ASTEREOGNOSIA

42
Q

can’t ID parts of ones own body

A

ASOMATOGNOSIA

43
Q

what is suggested by the results of the rubber hand illusion

A

that association cortex in the post-par and front lobes are involved with the bimodal neurons that work on touch and vis

44
Q

pain has no

A

cortical reception

45
Q

which area has analgesic effects on pain?

A

Periaquaductal grey

Brain and Behaviour 1 (8 decks)

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