Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Psychology 479 > Chapter 14 - Parietal Lobe > Flashcards

Chapter 14 - Parietal Lobe Flashcards

You may prefer our related Brainscape-certified flashcards:
Psychology 101 flashcards GRE® Psychology flashcards AP® Psychology flashcards
1
Q

What’s the general function of the parietal lobes?

A
  • Process and integrate somatosensory and visual information, especially as it pertains to movement control
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What purpose does the intraparietal sulcus have?

A
  • Divides the inferior and superior parietal lobes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What components make up the inferior parietal lobe?

A
  • Supramarginal gyrus (crescent-shaped)
  • Angular gyrus (posterior to supramarginal gyrus)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What’s another term for the postcentral gyrus?

A
  • S1 (primary somatosensory area)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Which Brodmann’s areas correspond to the superior and inferior parietal lobes?

A
  • Superior - 5 and 7
  • Inferior - 40, and 39
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which Brodmann’s areas correspond to the anterior zone of the parietal lobes?

A
  • S1 (1-3)
  • 43
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What types of sense is closely associated with the angular gyrus/area PG BA 39)?

A
  • It’s largely visual and contains polymodal regions
  • Larger in the right hemisphere.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What type of inputs does area PG receive?

A
  • Visual, somatosensory, oculomotor (eye movements), cingulate (cognition, emotion), auditory
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What roles does area PG have?

A
  • Role in intermodal mixing
  • Role in spatially-guided behaviour with respect to both visual and tactile information
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What general functions does the dorsolateral prefrontal cortex have (DLPFC)?

A
  • Internally-motivated behaviour
  • Working memory
  • Planning
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which other brain regions are areas PG/PF highly connected to?

A
  • The DLPFC and the OFC
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

T/F: Posterior parietal areas and dlPFC project to very different areas as a form of parallel processing.

A
  • FALSE
  • They both project to very similar areas including the paralimbic cortex, hippocampus, and various subcortical regions
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Parieto-premotor stream?

A
  • Apart of the dorsal stream anatomy
  • The principle unconscious “how” pathway
  • Affects motor output most directly
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Parieto-prefrontal?

A
  • Apart of dorsal stream anatomy
  • May be related to working memory for visuospatial objects
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Parieto-medial-temporal?

A
  • Apart of dorsal stream anatomy
  • Role in spatial recognition and spatial navigation
  • More perceptual/conscious
  • Projects to the hippocampus and the parahippocampal regions
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Role of anterior zones in parietal lobe function?

A
  • Processes somatic sensations and perceptions
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Role of posterior zones in parietal lobe function?

A
  • Integrates somatic and visual input to control movement
  • Involved in mental imagery (ex. object rotation, arithmetic, reading etc.)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What’s acalculia?

A
  • Inability to perform mathematical computations
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What’s the name for Brodmann’s area 40?

A
  • Supramarginal gyrus
20
Q

What would damage to S1 cause?

A
  • Affects thresholds for detecting touch
  • Can create high sensory thresholds (i.e., less sensitive to stimuli)
21
Q

WHat’s afferent paresis?

A
  • Difficulty executing smooth, coordinated movements due to loss of afferent (somatosensory) feedback from the muscles. Don’t have info on what you’re doing
  • Often caused by damage to S1
22
Q

What is astereognosis?

A
  • A somatoperceptual disorders
  • The inability to recognize an object by touch
  • Have normal thresholds, but patient is unable to recognize objects when blindfolded
  • “A loss of body knowledge”
23
Q

What can cause astereognosis?

A
  • Small lesions to S1
24
Q

What’s simultaneous extinction?

A
  • A somatoperceptual disorder- The failure to perceive a sensory stimulus only if that stimulus is presented simultaneously with a second stimulus
25
Q

What can cause simultaneous extinction?

A
  • Damage to secondary somatic cortex (areas PE and PF) in RIGHT hemisphere
  • ALWAYS RIGHT HEMISPHERE
26
Q

How would you test for extinction in a stroke patient?

A
  • When holding up two objects, patient would have to focus on one object at a time, using their left visual field to identify the object.
27
Q

What’s numb touch?

A
  • A type of somatoperceptual disorder
  • It’s the tactile analogue of blindsight
  • Loss of tactile perception, but are able to locate objects through touch (better than chance selections)
  • Very rare
28
Q

Asomatognosia?

A
  • Loss of knowledge or sense of one’s own body and bodily condition
  • Most commonly due to right hemisphere lesions
29
Q

What are the different types of asomatognosias?

A
  • Anosognosia - unawareness or denial of illness
  • Anosodiaphoria - indifference to illness (able to recognize it, but doesn’t care)
  • Autopagnosia - inability to localize and name body parts, caused by left hemisphere damage
  • Asymbolia for pain - absence of typical reactions to pain, such as reflexive withdrawal from a painful stimulus. Get easily injured. Associated with insular lesions
30
Q

Balint syndrome?

A
  • A host of symptoms of posterior parietal damage
  • Usually associated with large bilateral lesions, resulting in deficits in visual attention, as well as motor function
31
Q

What three major symptoms make up Balint syndrome?

A
  • Oculomotor apraxia
  • Optic ataxia (no visually-guided reaching)
  • Simultagnosia (can’t perceive more than one object at a time)
32
Q

What’s oculomotor apraxia?

A
  • Paralysis of eye fixation with inability to look voluntarily into the peripheral visual field
33
Q

What’s contralateral neglect?

A
  • Another symptom of posterior parietal damage
  • Neglect of the body or space contralateral to a (usually) right lesion (i.e., ignore the left side of their visual field
  • It’s a deficit of attention, nothing wrong with visual fields
34
Q

When asked to copy a clock drawing, the patient only fills in the right side of the drawing. What might we diagnose this patient with?

A
  • Contralateral neglect
35
Q

What are the stages of contralateral neglect recovery?

A
  • Stage 1: Allesthesia
  • Stage 2: Simultaneous extinction
36
Q

Allesthesia?

A
  • Responds to stimuli on the neglected side as if they were present on the unlesioned side
  • Ex. poked on left arm , they may mistake this for being poked on the right arm
37
Q

What brain area is the locus of contralateral neglect?

A
  • Damage to both intraparietal sulcus (divides vs. inferior parietal lobe) and right angular gyrus are necessary
38
Q

What’s one theory for why contralateral neglect occurs?

A
  • Left hemisphere orients attention towards right visual space
  • Right hemisphere orients attention to both visual hemifields
  • Loss of left parietal function could be compensated for by right hemisphere
39
Q

What’s Gerstmann syndrome and its symptoms?

A
  • Caused by damage to left parietal lobe
  • Symptoms include finger agnosia (can’t recognize fingers), agraphia (can’t write) , acalculia, right-left confusion
40
Q

What may disturbed language function indicate?

A
  • May be a symptom of left parietal damage
41
Q

What’s apraxia and impaired recall?

A
  • Both may indicate damage to left parietal lobe
  • Apraxia - loss of skilled movement
  • Impaired recall - Unable to recall a list of numbers properly whether presented orally or visually
42
Q

T/F: Apraxia can be caused by intellectual deterioration.

A
  • FALSE
  • Apraxia is not caused by weakness, paralysis, intellectual deterioration or poor comprehension
43
Q

Ideomotor apraxia?

A
  • Inability to use and understand non-verbal communication such as gestures or to copy movement sequences
  • Associated with left posterior parietal lesions (right parietal performs normally)
44
Q

How can you test for ideomotor apraxia?

A
  • Kimura box tests (patient must move through movement series)
  • Serial arm-movement copying test
  • Serial facial-movement copying test
45
Q

Constructional apraxia?

A
  • Visuomotor disorder - spatial organization is disturbed
  • Posterior parietal damage to either hemisphere
  • Ex. cannot assemble a puzzle, build a tree house, draw a picture
46
Q

Why does damage to the parietal often result in apraxia?

A
  • There’s a disruption of the parietofrontal connections that control movement
  • Posterior parietal cortex receives tactile, visual, and proprioceptive afferent signals and is highly connected to frontal cortex, which commands our movements

Psychology 479 (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions