DISORDERS OF PERCEPTION

Question 1

The impairment of object recognition in the presence of relatively intact elemntary visual peception, memory and general intellectual function

Answer 1

VISUAL OBJECT AGNOSIA

Question 2

Cannot distinguish between or recognize different visual shapes
(cannot copy and draw shapes)

Answer 2

Apperceptive Agnosia

Question 3

Visual perception relatively preserved but not visual object recognition.
cannot indicate visual information by non-verbal means
“Recognition without meaning”

Answer 3

Associative agnosia

Question 4

Unable to identify faces
“face blindness”
can discriminate: gender, race, age, emotional expression

Answer 4

Prosopagnosia

Question 5

inability to orient, localize and reach for objects

Answer 5

Optic ataxia / Balint syndrome

Question 6

inability to perceive more than one object at a time.
can identify individual elements of a complex scene but have great difficulty in understanding what is occurring overall within the scene

Answer 6

Simultanagnosia

Question 7

Inability to voluntrarily move eyes to a new position

Answer 7

Optic apraxia

Question 8

inability to name visually presented objects

Answer 8

Optic Aphrasia

Question 9

Loss of perception of motion with preservation of the perception of other modalities of vision (Color, shape)

Answer 9

Akinetopsia

Question 10

Can recognize faces, but they associate them with strangers

Answer 10

Capgras syndrome

Question 11

disorder which visual fields appear to be tilted, rotated or flipped

Answer 11

Visual Allesthesia

Question 12

Loss of color vision

-due to lesions of color-specialized cortex

Answer 12

Achromatopsia

Question 13

size and object distortions

Answer 13

Metamorphopsia

Question 14

Objects appearing larger

Answer 14

Macropsia

Question 15

Objects appearing smaller

Answer 15

Micropsia

Question 16

Objects appearing nearer

Answer 16

Pelopsia

Question 17

Objects appearing farther

Answer 17

Teleopsia

Question 18

Subjects are able to consciously perceive and discriminate VISUAL MOTION in their otherwise “Blind visual field”

Answer 18

Riddoch syndrome

Question 19

with fast motion subjects report visual perception without the ability to discriminate
“blind but see moving objects”

Answer 19

Gnosanopsia

Question 20

intact discrimination ability but without visual perception

“blind but can discriminate objects”

Answer 20

Agnosopsia or Blindsight

Question 21

Perceiving multiple copies of the same object often arranged in rows and column

Answer 21

Polyopia