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absolute threshold accommodation
the minimum stimulation needed to detect a particular stimulus 50 % of the time the process by which the eye's lens changes shape to help focus images on the retina the sharpness of vision the sense or act of hearing the point at which the optic nerve leaves the eye, creating a spot without vision, because no receptor cells are located there analysis that begins with the sensory receptors and works up to the brain's integration of sensory information a coiled, bony fluid-filled tube in the inner ear through which sound waves trigger nerve impulses a device for converting sounds into electrical signals and stimulating the auditory nerve through electrodes threaded into the cochlea perceiving familiar objects as having consistent color, even if changing illumination alters the wave-lengths reflected by the object hearing loss caused by damage to the mechanical system that conducts sound waves to the cochlea retinal receptor cells that are concentrated near the center of the retina and that function in daylight or in well-lit conditions; they detect fine detail and give rise to color sensations the minimum difference between two stimuli required for detection 50 % of the time; experienced as a just noticeable difference a condition in which far-away objects are seen more clearly than near objects because the image of the near objects is focused behind the retina nerve cells in the brain that respond to specific features of stimulus, such as shape, angle, or movement the central focal point in the retina, around which the eye's clones cluster the number of complete wavelengths that pass a point in a given time
in hearing, the theory that the rate of nerve impulses travelling up the auditory nerve matches the frequency of a tone, thus enabling is to sense its pitch the theory that the spinal cord contains a neurological gate that... [continues]
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