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Half-Wave rectification
Half-Wave rectification A signal which follows only the positive part of a sinusoid and has zero-response to the negative part. Many simple cells show half-wave rectification to contrast reversing patterns.
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Contrast "Short for ""contrast media."" Contrast media are X-ray dyes used to provide contrast, for example, between blood vessels and other tissue."
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Halfan Halfan is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): halofantrine hydrochloride.
Halflytely Halflytely is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): bisacodyl; polyethylene glycol; potassium chloride; sodium bicarbonate; sodium chloride.
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Human growth hormone The hormone that regulates growth.
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Hymen A thin membrane that covers the opening of the vagina.
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Half-Wave rectification
Haploscopic stimulation Different stimuli for the two eyes.
Hemineglect A condition following damage to the parietal stream of one hemisphere in which individuals are unaware of stimuli from the hemifield that projects to that hemisphere.
Hollow face illusion A concave hollow mask of a face viewed from a few feet gives the impression of a normal face. The cognitive interpretation overrides the stereoscopic information.
Horizontal cells Cells in the retina connected via gap junctions that mediate lateral information transfer over large distances.
Horopter For a given fixation point, the set of points on the retina that are perceived to have zero retinal disparity. The points sweep out an arc in space that intersects a fixated point in space.
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