Retinocollicular Pathway
This pathway is distinct from our “conscious pathway” for vision and is mainly involved in:
- Reflexive eye movement
- Orienting to visual stimuli
- Spatial attention
Geniculostriate Pathway
This pathway is the main pathway of “conscious vision”. It is responsible for our conscious visual perception.
There are parallel pathways in the visual system that carry differen visual information
More tissue is disproportionately allocated for the forveal information (center of our receptive field)
Cells in the primaryVisualCortex
This represents a sample of cells in the primary visual cortex that respond differently to different light patterns.
- Simple Cell: responds more when light is shaped are orientated in the way it wants
- Complex Cell: responds to just the orientation of the light shape
- Hypercomplex Cells: respond to orientated bars of specific length
This lets us deduce that aspects of our visual processing consists of building a hierarchy of patterns to make complex features. Kinda like a CNN
Anatomy of the primaryVisualCortex
- Interblob process orientation and form
- blobs process colour information
- input of the two eyes remain segregated, allowing for efficient parallel processing