Unit 2 Flashcards
Balint Syndrome
Simultanagnosia, bilateral parietal damage.
Patient can only perceive one object at a time.
Evidence for object-based attention.
Object Agnosic Patient CK
- Bad at recognizing objects
- 6x worse at recognizing inverted faces
- great at recognizing upright faces
- object processing system is damaged
- treats upside down faces like objects
Prosopagnosic Patient LH
- Better at recognizing inverted faces than upright faces (an inverted inversion effect)
- Upright face processing system is damaged
The perceptual theory of imagery
Kosslyn
o Imagery is very similar to perception, relies on common brain mechanisms
o Representation is pictorial, spatial structure similar to a picture
o Predicts top-down activation of early visual areas
Propositional Theory
Pylyshyn
o Imagery based on propositions, not images
o Propositions are abstract symbolic representations, not pictoral or perception based
o Does not predict top-down activation of early visual areas
Reflexive Attention
Exogenous, stimulus-driven, fast: things moving, bright, shiny, loud.
Voluntary Attention
Endogenous, slow:
FEF
Frontal eye fields: has a retinotopic map of saccade (ballistic eye movement) locations. Stimulating a region will result in a saccade to that region’s movement field
Neglect Syndrome
Right parietal damage, patients ignore the left visual field
Greater WM load leads to greater activity in
o Supramarginal gyrus
o Angular gyrus
o Broca’s area
o Dorsolateral prefrontal cortex (DLPFC)
Explicit (episodic, semantic) processed in
Medial Temporal Lobe
Neocortex
Implicit (perceptual priming) processed in
Perceptual Representation System
Neocortex
Implicit (procedural) processed in
Basal ganglia
Implicit (conditioning - emotion) processed in
Amygdala
Implicit (conditioning - eyeblink) processed in
Cerebellum
