PSYCH 2NF3 Chapter Notes - Chapter 8: Periaqueductal Gray, Postcentral Gyrus, Auditory Cortex
10 Mar 2014
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Portrait: effects of a sensory loss on movement. He could not move, no sense of pressure or touch in hands or feet felt tingling sensations tho and trouble talking. He lost fine touch and pressure fibers from sensory nerves that provided his nervous system with info about the position of his limbs and their movements. Never recovered but did learn to walk and drive- did so by replacing body awareness with vision. Cells that transduce sensory energy into neural activity. Respond only to a narrow band of energy. Electromagnetic spectrum- visible to human eye (400-700 nm) Ppl who lack receptors for parts of visual spectrum= color blind. Easy to activate but stop responding after a very short time ex. Touching arm with finger, immediately feel but then it will fade. Touch arm harder with finger and u will feel touch much longer.
