PSYCH 1XX3 Lecture Notes - Lecture 5: Occipital Lobe, Visual Processing, Ganglion Cell
18 May 2017
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1/3 brain for processing visual information eg. movie theatre: audio coming from speakers, perceive sound as coming from actors. The visual system, processes, and interprets visual information. John blind due to occipital lobe stroke at age 30. Need to understand eyes and properties of light. Vary in 2 ways: height of ea wave (amplitude, distance b/w peaks of successive waves (wavelength) Greater amplitude = more light reflected/emitted by object. Humans only see tiny portion of total range of wavelengths of electromagnetic radiation (visible spectrum: shorted wavelength = 360 nanometers (violet) high frequency, longest wavelength = 750 nanometers (red) low frequency. 3rd physical characteristic of light affects perception of saturation, richness, colours. Natural light is a desaturated combination of many wavelengths. Pure light (completely saturated) is made of single wavelength. Natural light (desaturated) is made of combo of many wavelengths. The brain must correct for upside-down and reversed retinal images. Lens curvature causes images to land on retina upside-down and revered.
