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PSYCH 377 > lecture 16 > Flashcards

lecture 16 Flashcards

parietal lobes

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1
Q

parietal lobe function

A

process and integrate sensory information

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2
Q

why is the parietal lobe good at integrating sensory info

A

because all of the sensory areas are nearby

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3
Q

5 functional regions of the parietal lobe

A

postcentral gyrus
posterior parietal cortex (PF and PG)
angular gyrus
precuneus
supramarginal gyrus

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4
Q

4 parietal reach regions of the dorsal stream

A

medial posterior region
- reach
anterior intraparietal area
- grasp
lateral intraparietal area
saccadic eye movement
- visual tracking

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5
Q

somatosensory areas of the postcentral gyrus project to where?

A

secondary somatosensory areas in the parietal lobe
motor planning and control areas in the frontal lobe

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6
Q

Area PE (Brodmanns 5) projects to where, to do what

A

motor areas 4,6, and 8 to guide movement based on limb position

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7
Q

Area PF (Brodmann 7) receives input from where and projects to where

A

input from PE and project to motor areas

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8
Q

what does area PG do?

A

integrate info from a bunch of systems, with cognitive input from the cingulate,
to control spatially guided behaviour

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9
Q

3 pathways of the dorsal stream

A

parieto-premotor - “how” for motor control
parieto-prefrontal - working memory for visuospatial objects
parieto-medial-temporal - project to hippocampus for spatial recognition, navigation and space maps

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10
Q

anterior parietal region function

A

somatosensory processing

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11
Q

posterior parietal region function

A

integrate somatosensory info with visual info to guide movement

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12
Q

parietal lobe creates a ____ map why?

A

multisensory, to enable effortles sinteraction with the world

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13
Q

movement guidance stream and requirement

A

dorsal stream, representation needs to be on the viewer as we all have diff bodies and proportions and need to know this in relation to the space around us
requires spatial awareness specific to us

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14
Q

object recognition

A

focus must be object centred, just need to know what it is and where we are in regard to it
this happens in the temporal lobe

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15
Q

activity of neurons in ____ ____ cortex depends on visual stimulation and ____ behaviour of the individual

A

posterior parietal, ongoing

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16
Q

T/F
some neurons are only active when doing work, and some inactive until you touch the object

A

true
reaching vs grasping and neuronal activity

17
Q

spatial neglect is caused by?

A

parietal lesions
like an attentional blindness

18
Q

sensorimotor transformation

A

integration of movement intention with sensory feedback

intention vs actual movement to perform smoothly towards a target

19
Q

Area PRR

A

parietal reach region
encodes desired outcome of movement

20
Q

what do we use to control prosthetic devices

A

recordings of biofeedback from the PRR area

21
Q

T/F
spatial info is likely to be localized

A

false
its likely to be point to point, a list of what to do at each decision point in the route

22
Q

medial parietal region activity

A

cells active when specific movement made at specific location, and control body movements to specific locations

23
Q

egocentric vs allocentric

A

you are point of reference, eveything else is point of reference
your right vs cardinal directions

24
Q

an impaired ability to tell L from R and defect in mental manipulation of an object could mean damage to what area

A

posterior parietal lobe

25
Q

other parietal lobe functions

A

arithmetic, language, movement sequences

26
Q

acalculia

A

unable to perform calculations, spatial component when doing things like carrying numbers, moving decimals

27
Q

damage to postcentral gyrus

A

high sensory thresholds, impaired ability to sense position, impaired steregnosis (identify by touch)

28
Q

afferent paresis

A

inability to feel with sensory neurons, means loss of feedback about positions of the limbs causing clumsiness

29
Q

astereognosis

A

loss of ability to identify an object by touch

30
Q

simultaneous extinction

A

simultagnosia, presented with two objects, can only identify the one on opposite side of lesioned hemisphere

31
Q

numb touch

A

like blind sight, can’t tell where they are being touched but they can guess

32
Q

asomatognosia

A

condition where patient loses knowledge about their body or condition

33
Q

anosognosia

A

unawareness of illness

34
Q

anosodiaphoria

A

indifference to illness

35
Q

autopagnosia

A

inability to locate or name body parts

36
Q

asymbolia for pain

A

lack of typical avoidance reactions to pain, inability to feel pain

37
Q

aphantasia

A

inability to imagine

PSYCH 377 (16 decks)

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