HMB200H1 Chapter Notes - Chapter 10: Prosopagnosia, Simple Cell, Achromatopsia
Document Summary
Retinofugal projection: optic nerve -> optic chiasm -> optic tract. Decussation -> crossing of fiber bundle from one side to other -> optic chiasm -> partial decussation. Binocular visual field -> central portion of visual hemifield viewed by both eyes. Optic racti -> lgn optic radiation --> primary visual cortex. Ablation to: left optic nerve blind left eye, left optic tract blind right visual (homonymous hemionopia) fiend, optic chiasm (heteronymous hemianopia) loss of peripheral optic tract hypothalamus. Optic tract- prectum (midbrain: control eye movements. Optic tract superior colliculus: saccadic eye movements. Pituitary hypertrophy excessive growth (thyroid), optic chiasm can"t cross bitemporal hemianopia: no peripheral vision. Optic tectum = superior colliculus in vertebrate groups. Retinotectal project form retina to superior colliculus. Lgn 6 layers: i, ii ventral, large, magnocellular l, r, iii vi dorsal, small, parvocellular r, l, r, l. Koniocellular- tiny neurons ventral to layers input from nonm nonp.
