Visual Information Processing Roland Browne PSYCH/640 December 16‚ 2013 Visual Information Processing The human brain is capable of perceiving and interpreting information or stimuli received through the sense organs (i.e.‚ eyes‚ ears‚ nose‚ mouth‚ and skin) (Weiten‚ 1998). This ability to perceive and interpret stimulus allows the human being to make meaningful sense of the world and environment around them. However‚ even as the human being is able to perceive and interpret stimuli information
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Chapter 5 Outline •Sensation is the detection of physical energy from the environment which weencode as neural signals. •When we organize and interpret our sensations‚ it is known as perception •The beginning level of sensory analysis is also known as bottom- up processing •Top-down processing is the information processing guided by higher-level mental processes‚ as when someone constructs perceptions drawing on our experienceand expectations. •Bottom up processing is sensory analysis that begins
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1276-1277. Cowey‚ A. & Rolls‚ E.T. (1974). Human Cortical Magnification Factor and its Relation to Visual Acuity. Exp. Brain Research‚ 21‚ 447-454. Kalloniatis‚ M.‚ & Luu‚ C. (2005‚ June 5). Visual Acuity. In Webvision: The Organization of the Retina and Visual System. Department of Optometry and Vision Sciences University of Melbourne‚ Australia. Retrieved June 5‚ 2005‚ from http://www.ncbi.nlm.nih.gov/books/NBK11509/ Millodot et al.‚ (1975). Effect of Dioptrics on Peripheral Visual Acuity. Vision
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Technology reported this Sunday in The Lancet that they have restored the sight of two women who are legally blind‚ by using embryonic stem cells. One patient named Mary‚ 51 years of age had macular degeneration‚ a progressive disease of the retina that affects the light-sensing cells in the central area of vision known as the macula‚ which stops working‚ and is a very common disease. 25 years old of age‚ Victoria the second patient‚ had Stargardt disease that is similar to macular degeneration
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reflected eye-shine‚ in order to detect and identify the species of animals in the dark and to send trained search dogs and search horses out at night. Historically‚ its function was regarded as simply to increase the light intensity of an image on the retina. Using eye shine to identify animals in the dark implies not only color but‚ also several other features. The color reciprocates to the type of tapetum lucidum with some distinction between species. Other features also include the distance between
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In the atrophic form‚ patients may have blind spots in the center of their vision. The wet form is characterized by the growth of abnormal blood vessels from the choroid underneath the macula. These blood vessels leak blood and fluid into the retina‚ causing distortion of vision that makes straight lines look wavy‚ as well as blind spots and loss of central vision. They eventually scar‚ leading to permanent loss of central vision. They affect daily life in that there is struggle to do housework
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inhibited. Three receptor pairs of opponent colors were proposed in the opponent-process theory: the red/green complex‚ yellow/blue complex and the black/white complex. In following scientific studies‚ research supported this theory and showed that the retina‚ thalamus and visual cortex all contain opponent-processing cells. Another part of this theory is that individuals cannot see two colors from one complex simultaneously‚ for example you cannot see bluish yellow or reddish green ‚ because of the opposing
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pigmentosa‚ which is a degenerative condition of the retina and this usually appears during adolescence or early adulthood. The balance of an individual is usually also affected with retinitis pigmentosa. The other part of Usher Syndrome‚ the hearing loss‚ is due to a genetic mutation affecting nerve cells in the cochlea‚ a sound transmitting structure in the inner ear. The same genetic effect also adversely affects photoreceptor cells in the retina leading to vision loss. Usher Syndrome is a heterogeneous
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projecting correctly. The images are not hitting the retina properly and are projecting in front of the retina. Since the objects are not projecting correctly those images appear out of focus. 2. Since myopia is the more commonly called nearsightedness where an individual can see objects closeup but objects at a certain distance appear out of focus or blurry. Objects appear out of focus because those images are not projecting correctly on retina. The best treatment available for myopia are corrective
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1. Sensation: the process by which sensory receptors and nervous system receive and represent stimulus energies from our environment 2. Perception: the process of organizing and interpreting sensory information‚ enabling us to recognize meaningful objects and events 3. Bottom-up Processing: analysis that begins with the sense receptors and works up to the brain’s integration of sensory information 4. Top- Down Processing: information processing guided by higher-level mental processes
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