Week 6: Visual Lesions

Question 1

Visual Degrees of Fovea

Answer 1

Central 1 to 2 degrees

Question 2

Visual Degrees of Macula

Answer 2

Central 5 degrees with high visual acuity

Question 3

Meyer’s Loop Location

Answer 3

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

Question 4

Meyer’s Loop Information

Answer 4

From inferior retina and superior visual fields

Question 5

Upper Optic Radiation Location

Answer 5

Up and under the parietal lobe

Question 6

Upper Optic Radiation Information

Answer 6

From superior retina and inferior visual fields

Question 7

Lower Optic Radiation Destination

Answer 7

Lingula

Question 8

Upper Optic Radiation Destination

Answer 8

Cuneate Gyrus

Question 9

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

Answer 9

The fovea

Question 10

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

Answer 10

The brachium of superior colliculus

Question 11

Retinogeniculostriate Pathway Purpose

Answer 11

Visual discrimination and perception

Question 12

Retinotectopulvinarextrastriate Pathway Purpose

Answer 12

Visual attention and orientation

Question 13

Dorsal Visual Processing Pathway Destination and Purpose

Answer 13

Parietooccipital association cortex for motion and spacial relationships

Question 14

Ventral Visual Processing Pathway Destination

Answer 14

Occipitotemporal association cortex and form recognition

Question 15

Cause of Cortical Blindness

Answer 15

Bilateral damage to primary visual cortex

Question 16

Visual Anosognosia Feature

Answer 16

Patients are unaware of their deficit

Question 17

Visual Anosognosia Cause

Answer 17

Cortical blindness

Question 18

Inferior Occipitotemporal Cortex Damage Can Cause the Following

Answer 18

Prosopagnosia, Achromatopsia, Micropsia and Macropsia

Question 19

Lesion of Damage in Prosopagnosia

Answer 19

Bilateral fusiform gyrus

Question 20

Achromatopsia

Answer 20

central disorder of color perception

Question 21

Prosopagnosia

Answer 21

Inability to recognize faces

Question 22

Micropsia and Macropsia

Answer 22

Objects appear unusually small or large

Question 23

Area of Damage in Bilant’s Syndrome

Answer 23

Dorsolateral parietooccipital cortex

Question 24

Bilant’s Syndrome Components

Answer 24

Simultanagnosia, Optic Ataxia, Occular Apraxia

Question 25

Simultanagnosia

Answer 25

Impaired ability to perceive parts of a visual scene as a whole

Question 26

Optic Ataxia

Answer 26

Inability to reach for or point to objects in space under visual guidance

Question 27

Ocular Apraxia

Answer 27

Difficulty voluntarily directing one’s gaze towards an object in the periphery through saccades

Question 28

Extrageniculate Pathway Main Purpose

Answer 28

Pupillary response to light