Week 6: Visual Lesions Flashcards

1
Q

Visual Degrees of Fovea

A

Central 1 to 2 degrees

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2
Q

Visual Degrees of Macula

A

Central 5 degrees with high visual acuity

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3
Q

Meyer’s Loop Location

A

Loops forward into the temporal lobe near the inferior horn of the lateral ventricle

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4
Q

Meyer’s Loop Information

A

From inferior retina and superior visual fields

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5
Q

Upper Optic Radiation Location

A

Up and under the parietal lobe

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6
Q

Upper Optic Radiation Information

A

From superior retina and inferior visual fields

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7
Q

Lower Optic Radiation Destination

A

Lingula

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8
Q

Upper Optic Radiation Destination

A

Cuneate Gyrus

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9
Q

About half the fibers from the optic nerve and half the cells in the primary visual cortex deal with information from where?

A

The fovea

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10
Q

Some optic tract fibers bypass the lateral geniculate nucleus and travel through where?

A

The brachium of superior colliculus

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11
Q

Retinogeniculostriate Pathway Purpose

A

Visual discrimination and perception

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12
Q

Retinotectopulvinarextrastriate Pathway Purpose

A

Visual attention and orientation

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13
Q

Dorsal Visual Processing Pathway Destination and Purpose

A

Parietooccipital association cortex for motion and spacial relationships

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14
Q

Ventral Visual Processing Pathway Destination

A

Occipitotemporal association cortex and form recognition

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15
Q

Cause of Cortical Blindness

A

Bilateral damage to primary visual cortex

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16
Q

Visual Anosognosia Feature

A

Patients are unaware of their deficit

17
Q

Visual Anosognosia Cause

A

Cortical blindness

18
Q

Inferior Occipitotemporal Cortex Damage Can Cause the Following

A

Prosopagnosia, Achromatopsia, Micropsia and Macropsia

19
Q

Lesion of Damage in Prosopagnosia

A

Bilateral fusiform gyrus

20
Q

Achromatopsia

A

central disorder of color perception

21
Q

Prosopagnosia

A

Inability to recognize faces

22
Q

Micropsia and Macropsia

A

Objects appear unusually small or large

23
Q

Area of Damage in Bilant’s Syndrome

A

Dorsolateral parietooccipital cortex

24
Q

Bilant’s Syndrome Components

A

Simultanagnosia, Optic Ataxia, Occular Apraxia

25
Simultanagnosia
Impaired ability to perceive parts of a visual scene as a whole
26
Optic Ataxia
Inability to reach for or point to objects in space under visual guidance
27
Ocular Apraxia
Difficulty voluntarily directing one's gaze towards an object in the periphery through saccades
28
Extrageniculate Pathway Main Purpose
Pupillary response to light