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Neuropsychology > ch 14 parietal lobes > Flashcards

ch 14 parietal lobes Flashcards

1
Q

the parietal lobes

A

process and integrate somatosensory and visual info–what you feel with what you see, movement control

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2
Q

anatomy of parietal lobes

A 
anterior border-central fissure
ventral border-sylvan fissure
dorsal-cingulate gyrus
posterior-parietooccipital sulcus
between frontal and occipital lobes, under parietal bone at skull roof
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3
Q

anterior zones process

A

somatic sensations and perceptions

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4
Q

posterior zones integrate

A

info from vision with somatosensory info for movement control (important to see to move)

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5
Q

use of spatial info: object recognition

A

viewer centered object indentification(where you are in space)–location, location orientation, and motion of an object
make computations everytime new movement made
brain operates on need to know basis
object centric-object compared to object

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6
Q

use of spatial info: guidance of movement

A

sensitive to eye movement, posterior parietal cortex, visuomotor guidance, cells detect visual ifo then move eye to examine it
dorsal stream-spatial processing

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7
Q

use of spatial info: sensorimotor transformation

A

neural calculations of relative position of the body with respect to sensory feedback from movements being made and planned
monkeys planned movement activity matched actual performance activity

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8
Q

spatial navigation requires

A

cognitive spatial map-route knowledge to reach destination and medial parietal region-neurons show responses associated with making specific movement at specific locatoin

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9
Q

3 symptoms of damage don’t fit visuomotor view of parietal lobes

A

acalculia, language, movement sequencing

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10
Q

lesions to postcentral gyrus produce

A

abnormally high sensory thresholds, impaired position sense, deficits in stereogenisis/tactile perception, afferent paresis

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11
Q

somatoperceptual disorders-asterognosis

A

inability to recognize object by touch

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12
Q

somatoperceptual disorders-simultaneous extinction

A

2 stimuli applied simultaneously to opposite sides of body, failure to report stimulus on side with lesion (extinction)

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13
Q

somatoperceptual disorders-blind touch

A

cannot feel stimuli, but can point to location

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14
Q

somatoperceptual disorders-asomatognosia

A

type of agnosia, loss of knowledge or sense of one’s own body, tactile perception disorder

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15
Q

somatoperceptual disorders-anosagnosia

A

type of agnosia, unawareness or denial of deficits

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16
Q

somatoperceptual disorders-anosodiaphoria

A

type of agnosia, indifference to deficits

17
Q

somatoperceptual disorders-asymbolia for pain

A

type of agnosia, absence of normal pain reactions

18
Q

somatoperceptual disorders-finger agnosia

A

type of agnosia, unable to point to fingers, show correct one

19
Q

symptoms of posterior damage-balint’s syndrome

A

can’t fixate of visual stimulus, neglect of objects, optic ataxia (inability to guide hand to object using visual info)
bilateral lesions-full visual fields, could recognize, use and name objects pics and colors
move eyes 35-45 degrees to the right not fixating on specific stimuli
noticed 1 object at a time (simultagnosia)
reaching under visual guidance (visual ataxia)

20
Q

symptoms of posterior damage-contralateral neglect

A

most often L neglect, neglect for visual, auditory, ans somesthetic stimulation
lesion mostly in R inferior lobe (intraparietal sulcus and angular gyrus)
during recovery patients go through allesthesia, respond to neglected stimuli as if it were on the other side of the body then simultaneous extinction
lesion to frontal lobe and cingulate cortex
defective sensation/perception
defective attention/orientation

21
Q

symptoms of posterior damage-object recognition

A

r pari lesion, poor at recognizing objects in unfamiliar views

22
Q

symptoms of posterior damage-Gerstmann Syndrome

A

finger agnosia, R-L confusion, agraphia, acalculia, L pari lobe lesion
L stroke-finger agnosia, R-L confusion, agraphia, acalculia
L lesion-angular gyrus-gerstmann syndrome not accurate

23
Q

other L parietal symptoms-disturbed language functions

A

broca’s, wernickes,

24
Q

other L parietal symptoms-apraxa

A

movement disorder in which loss of movement not caused by weakness, inability to move, intellectual deterioration/poor, loss of skilled movement
ideomotor-can’t copy serial movemelts, L lesions
constructional-cant copy pics, build puzzles, copy facial movements, L/R lesions

25
Q

other L parietal symptoms-

A

dyscalculia, poor recall, inability to discriminate L from R, R hemianopia

26
Q

symptoms of posterior parietal lobe

A

deficits in drawing (R), spatial attention

27
Q

disorders of spatial cognition

A

mental rotation requires mental imaging of stimulus (L) and manipulation of image

28
Q

principle regions

A

postcentral gyrus, superior parietal lobule, parietal operculum, supramarginal gyrus, angular gyrus
supramarginal and angular gyri=inferior parietal lobe

29
Q

specifical parietal lobe regions take part in ____ stream of ____ processing

A

dorsal, visual

30
Q

saccades

A

series of involuntary, rapid, small movements or jerks that are made by both eyes simultaneously in changing fixation point

31
Q

drawing deficits

A

worse with R hemisphere damage,
drawings with L hemi damage less recognizable, less lines
R hemi omits left side details and rotates image

32
Q

somatosensory threshold test

A

postcentral gyrus lesions-threshold increases on contralateral side
2 point discrimination test

33
Q

tactile form recognition test

A

manipulate shapes in holes then draw from memory

no certain lesion location

34
Q

contralateral neglect test

A

line bisection test (mark middle of 20 lines)

those with neglect miss L side

35
Q

visual perception test

A

series of incomplete faces/objects presented, combine and identify (mooney closure/golin incomplete figures)
sensative to damage at R parietotemporal junction, ventral visual stream

36
Q

spatial relations test

A 
l/r differentiation tests-body parts presented at different orientations, indicate which side of body
L pari (and frontal) damage
37
Q

language test

A

token test-4 shapes in 5 colors in front of person, touch 1 at a time then multiple, can read instructions aloud then follow
temporal speech related

38
Q

apraxia test

A

kinura box test-push button with index fingers, pull handle with 4 fingers, press bar with thumb
apraxics perform poorly

Neuropsychology (10 decks)

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