PSY280H1 Chapter Notes - Chapter 4: Visual Cortex, Retinal Ganglion Cell, Receptive Field

• School: UTSG
• Department: Psychology
• Course: PSY280H1
• Professor: Kristie Dukewich

Document Summary

Following the signals from the retina to cortex. The visual system: both eyes receives from contralateral and ipsilateral visual field. Temporal hemi-retina retina half closer to temple (outer) Process nasal visual field (inner areas: overview of visual system, depicts pathways neural signals follow. Nasal hemi-retina retina half closer to nose (inner) once left retina: Left half"s of both retina goes to left lgn & striate cortex. Right half"s of both retina goes to right lgn & striate cortex: retinal ganglion cells: 2 types. Midget rgcs small, compact dendritic field, 90% rgcs. Parasol rgcs large, umbrella like dendritic field, 10% rgcs. Large receptive field, photoreceptors span huge area. Biased towards giving periphery info (orientated: optic chasm half the wires cross from retina to lgn. Cut bi-temporal blindness (hemianopsia: lateral geniculate nucleus (lgn) within thalamus. Most retina signals travel out the eye (in optic nerve) to lgn: primary visual receiving area receives signal from lgn.