Visual Perception Essay -- Biology Essays Research Papers

Visual PerceptionAny one given experience an organism perceives must incorporate several centripetal systems, that involves numerous make sense of organs , that further more are comprised of millions upon millions of firing cells. Perception is not a direct mirroring of stimulus, but a complex helter-skelter patterns dependent on the simultaneously activity of neurons. This essay deals primarily with neurons from the middleal sensory system. The outer ridge of the brain, known as the cerebral cortex begins the synopsis of sensory messages. (1) Nevertheless, ocular perception 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 perception process to begin, is vision. Vision is dependent on the fundamental interaction between light input and the eye. The visual input is seen through lens that takes different light outside, refract and bend into poi nts of light that focus on specific places on the retina. This light-sensitive tissue that lines the sticker 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 nervous 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 travel 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, straightforward procedures. Is it reasonable that all of what one perceives is dependent exclusively on a specific set of procedures, rather than the i nteraction of cells, organs and systems? The former process seems to be improbable, while the latter process proves to be a chaotic, massive and cooperative. It was alluded to in class that one does not bespeak 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. Contour and Contrast, Scientific American, June 1972, pp. 91-101 Crutchfield, James. Chaos, Scientific American, December 1986, pp. 46-57