Warren Lecture slide part 1.1 Flashcards
The eye itself is similar to camera
Contains a lens system that inverts the image
Has an aperture (the pupil) for controlling light exposure
Film (the retina) that records the image
Cortical Visual Processing System
Visual input enters the eyeball, travels back to the occipital lobe, is processed and stored in the posterior areas of the cortex to provide a library for the prefrontal circuitry to use vision to complete tasks
Cortical visual processing system
Two Divisions
- Anterior visual processing system
- Posterior visual processing system
Anterior system
System anterior to the LGN
Job is to accurately and completely capture and record visual input and begin the relay process
- Need to have high quality materials to work with
Posterior system
Behind to LGN Job- relay high quality, accurate information to build the library for the prefrontal area Two Divisions - Cortical relay system - Cortical processing system
Cortical relay system
Lateral Geniculate Nucleus
Occipital lobe
Lateral Geniculate Nucleus
Tunes CNS into salient feature
Occipital lobe
- Receives input directly from retina
- Refines and enhances retinal input
- Sorts out input and sends it on to temporal and parietal circuitry for processing
Posterior Regions of cortex
Provide a library of visual images,maps and visual memories to the pre-frontal lobes
Posterior temporal lobe
Catalogue objects
Identifies objects
Posterior parietal lobe
Maintain maps
Orient to space
Prefrontal cortex
CEO of the brain
-Estabilishes and directs the plan
- decides what it needs from the environment and from memory
Obtains the information it needs from the posterior areas of the cortex
Coordinates the other neural structures in executing the plan
Archicortex
Assist the frontal lobes to pay attention to and examine important information
Hippocampus
Keeps track of details that may be important
Amygdala
Examines incoming visual input assig emotional relevance to incoming input
