Conditions of consciousness

Question 1

Cortical blindness

Answer 1

Cause: damage to bilateral occipital cortex

Symptoms: no visual sensation or perception at all

Question 2

Blindsight

Answer 2

Cause: damage to V1 (primary visual cortex)

Symptoms:
- no conscious visual perception
- intact colour and directional discrimination
- intact reaching and grasping
- intact reaction to objects

Question 3

Hemispatial neglect

Answer 3

Cause: damage to right parietal cortex

Symptoms: no conscious perception of contralateral visual field

Question 4

Visual agnosia

Answer 4

Cause: damage to unilateral occipital cortex

Symptoms: impaired recognition of visually presented objects

Question 5

Colour agnosia

Answer 5

Cause: damage to V4

Symptoms: impaired recognition of colours

Question 6

Prosopagnosia

Answer 6

Cause: damage to fusiform face area

Symptoms: impaired recognition of faces

Question 7

Motion blindness

Answer 7

Cause: damage to V5 (middle temporal area)

Symptoms: impaired perception of movement

Question 8

Apperceptive agnosia

Answer 8

Cause: damage to occipital cortex

Symptoms: impaired visual perception, leading to impaired visual recognition

Question 9

Associative agnosia

Answer 9

Cause: damage to inferior occipitotemporal regions

Symptoms: impaired recognition of objects