Form Perception 2 Flashcards
Feature Detectors
cells are very particular about what will make them fire
Simple Cell
responds maximally to a bar of a certain orientation in a particular region of the retina, sensitive to the location of the bar within the receptive field
Complex Cell
responds maximally to a bar of a certain orientation and direction of movement, regardless of where the bar is located within the receptive field
Hypercomplex Cell
respond maximally to a bar of a particular orientation and direction of movement, ending at specific points within the receptive field
Extrastriate Cortex
- Where visual integration begins
- Has multiple subregions that each receive a different type of information from the primary visual cortex about the visual scene
- Info begins to be segregated into 2 streams according to which type of info is processed
Dorsal Stream
processes where objects are located in visual scene, takes info from PVC to parietal cortex which processes spatial info
goes to parietal cortex
Ventral Stream
processes info about what the object is including form and colour, takes info from PVC to temporal cortex where all bits of feature info come together
goes to temporal lobe
Temporal Cortex
- Arranged in vertical columns that are oriented perpendicularly to surface of cortex
- Respond to more complex stimuli
- 5 layers of neurons within each cortical column
- Each layer responds to slightly different features within the category
Cataracts
like a thick cloud in the lens of your eye
Object Agnosia
inability to perceive objects
Prosopagnosia
inability to recognize faces
Primary Visual Cortex
responds to lines of specific orientation and motion
Temporal Lobe
responds to more complex stimuli like hands, faces
