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Human Neurospychology Exam 2 > Occipital Lobes > Flashcards

Occipital Lobes Flashcards

1
Q

Damage to V4. Loss of ability to detect color- black and white world. no color.

A

Achromatopsia

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2
Q

Damage to V5. Inability to detect objects in motion. Can’t track things as they move.

A

Akinetopsia

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3
Q

What is often spared in homonymous hemianopia due to it having much representation in the cortex?

A

Macula

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4
Q

What kind of damage allows you to recover from being blind?

A

Bilateral Occipital lobe damage

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5
Q

Total loss of vision is due to lesions at the

A

Optic Radiation

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6
Q

a blind spot

A

Scotoma

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7
Q

Failure to recognize objects.

A

Visual Agnosia

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8
Q

Inability to recognize objects due to problems perceiving the object.

A

Apperceptive visual agnosia

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9
Q

apperceptive agnosia is due to a lesion where?

A

parietal-occipital junction- mainly Right

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10
Q

Problems associating objects with meaning. Can perceive object as whole. “Can tell you how to use it but can’t tell you what it is used for”

A

Associative visual agnosia

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11
Q

associative visual agnosia is due to lesion at the

A

left parietal-occipital

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12
Q

Inability to appreciate more than one aspect of an object at a time. Can’t play poker- can’t see royal flush

A

Simultanagnosia

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13
Q

Inability to recognize familiar faces

A

prosopagnosia

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14
Q

lesion to mainly right fusiform gyrus causes

A

prosopagnosia

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15
Q

Problems identifying colors. Color discrimination is intact.

A

Color agnosia

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16
Q

Color agnosia has lesion at what side of hemisphere?

A

left

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17
Q

cannot recognize words but can write. cannot read their own written material.

A

alexia without agraphia

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18
Q

alexia without agraphia is due to damage at the

A

left occipital lobe and corpus callosum

19
Q

information from right occipital cannot reach language centers of left hemisphere. homonymous hemianopia is usually present with this disconnection syndrome.

A

alexia without agraphia

20
Q

inability to read and write

A

alexia with agraphia

21
Q

alexia with agraphia is due to lesion at the

A

angular gyrus

22
Q

comprised of fibers from rods and cones

A

optic chiasm

23
Q

sees information from outer visual field and crosses over at the optic chiasm.

A

nasal retina

24
Q

information from inner visual field that stays ipsilateral.

A

Temporal retina

25
Q

information from retina terminates here and process of visual input begins. What and Where systems begin here.

A

Visual Cortex

26
Q

area that is primary projection for vision. up is down, down is up. surrounds calcimine fissure. surrounded by area 18.

A

Area 17(V1)

27
Q

secondary sensory area. elaboration and synthesis of visual info. deals with orientation, spatial frequency, and color. surrounded by area 19.

A

Area 18(V2)

28
Q

Many connections with other regions of hemisphere. integration of visual information gathered from other senses here. visual memory. no color. recognition of moving shapes.

A

Area 19(V3)

29
Q

Part of dorsal stream to parietal lobe. processing global information.

A

Dorsal V3

30
Q

Strong connections with inferior temporal cortex.

A

Ventral V3

31
Q

Area selective for color, some line orientation, and pattern recognition. Has role in attention. It is in the ventral stream. Processes intermediate level of complexity- simple shapes, not complex things like faces.

A

V4

32
Q

Area located in the occipitoparietal junction. cells respond to direction of motion and speed of motion.

A

V5/MT

33
Q

lesions to what area and it’s connections causes visual field defects?

A

Area 17

34
Q

subdivisions of thalamus that relay visual information to the cortex.

A

Lateral Geniculate Nuclei

35
Q

Top 4 layers (p layers) of lateral geniculate nuclei that is responsive to color, detail, stationary or slow movement. Arise from cones.

A

Parvocellular

36
Q

Bottom 2 layers (M layers) of lateral geniculate nuclei that is responsive to movement and orientation. Arise from rods.

A

Magnocellular

37
Q

this is deep in temporal lobes and has the geniculocarine tract that carries info from LGN to cortex.

A

Optic radiations

38
Q

lesion at right optic nerve causes

A

total blindness in right eye

39
Q

lesion at optic chiasm causes

A

bitemporal hemianopia

40
Q

lesion at right optic tract causes

A

left homonymous hemianopia-left visual field defecit

41
Q

right cortical lesion causes

A

left homonymous hemainopia but is macula sparing

42
Q

person found that with a lesion to optic radiation, some retain visual function in blind area for movement and color discrimination.

A

Riddoch

43
Q

what projects to pulvinar of thalamus and visual association areas?

A

superior colliculus

44
Q

stimultanagnosia is caused by a lesion to the

A

right occipital lobe

Human Neurospychology Exam 2 (3 decks)

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