PSYC100 Lecture Notes - Lecture 4: Stirrup, Hair Cell, Cochlear Nerve
1 Mar 2017
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Iris: colored portion; constricts & enlarges to control amount of entering light: sclera: white portion; stability, pupil: dark center of iris, lens: curved surface accommodation changes shape to keep stimuli in focus. Retina (back of eye: photoreceptors: transduce light energy to neural energy, fovea: shallow depression; many photoreceptors - resolution of fine detail, optic disc: nerve fibers leave eye & head to brain (blind spot - no photoreceptors) Retinal ganglion cells: leave eye as bundle of fibers at optic disc (blind spot) to project info to the brain. Lateral geniculate nucleus (lgn): part of thalamus; retinal ganglion cells travel through optic nerve, through lgn, to visual cortex. Context effect: identity of pattern is determined by surrounding context rather than by the features comprising the pattern. Evidence against feature detection model of pattern recognition. 350-750: (top to bottom) blue, green, yellow, red.
