Visual Perception Essay -- Biology Essays Research Papers

Visual perceptual experienceAny one given experience an organism perceives must merged several sensory systems, that involves numerous number of organs , that further more argon comprised of millions upon millions of firing cells. Perception is not a direct mirroring of stimulus, solely a complex chaotic patterns symbiotic on the simultaneously action of neurons. This essay deals primarily with neurons from the optical sensory system. The outer ridge of the brain, cognise as the cerebral cortex begins the analysis of sensory messages. (1) Nevertheless, visual detection is possibly more widespread than one area of the cerebral cortex and like ly over various subcortical structures and number of different systems as well. (2) One of the many ways for the scholarship work out to begin, is vision. Vision is dependent on the interaction between firing stimulus and the eye. The visual stimulant is seen through lens that takes different light outside, refract and bend into poin ts of light that focus on specific places on the retina. This light-sensitive tissue that lines the can of the eye consists of interconnected neurons. The three diff erent types are receptor cells, bipolar cells and ganglian cells. When photoreceptors are stimulated, they change in structure of photopigments in the receptors and transduce light input into neural activity. (2) Electrical stimulus trave ls down the axon of bipolar cells to the ganglian cells. The ganglian cells are activated through nerve impulses or action potentials and fit down the optic nerve. This activity conducts along the optic nerve to the geniculate nucleus that then travels to the mid- brain. (2) Finally the firing neurons activity travels to the cortex at the back of the brain, known as the stria... ...ic methods are more reasonable than linear, truthful procedures. Is it reasonable that all of what one perceives is dependent exclusively on a specific set of procedures, rather than the interaction of c ells, organs and systems? The former process seems to be improbable, while the latter process proves to be a chaotic, bulky and cooperative. It was alluded to in class that one does not need the formulized picture or the visual perception. Nonetheless, I think that this added perplexity is a necessity. The visual perception of the picture encourages our understanding of ourselves as we ll as our surroundings. Internet Sourceshttp//sulcus.berkeley.edu/FLM/MS/Physio.Percept.htmlRatlif f, Floyd. chassis and Contrast, Scientific American, June 1972, pp. 91-101 Crutchfield, James. Chaos, Scientific American, December 1986, pp. 46-57