PSYB65H3 Lecture Notes - Lecture 4: Optic Chiasm, Lateral Geniculate Nucleus, Retinal Implant
Document Summary
Object recognition: tell us what an object is based on what we know. Information must be as small as possible: when part of the retina is pulled off, monocular degeneration, spares peripheral vison, disproportionate effect on cones. Implanted at the back of the eye: sends information to bipolar and ganglion cells. Primary projection pathways of the visual system: each eye captures a bit of each side of space, one side of space is processed on the opposite side, ex. Information coming from the right eye will be processed on the left side of the brain: pathway, step 1, crosses information from the central field. Information passes through the optic chiasm: step 2, sensory relay station (thalamus) Blind spots caused by brain injury: there is retinotopic mapping on the primary visual cortex, parts of the visual cortex accounts for different parts of vision. Injury to the retinotopic map results in a scotoma corresponding to the location.
