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Anorexia nervosa and impaired visual discrimination learning tend to coexist.
2003 JUL 3 - (NewsRx.com & NewsRx.net) -- Anorexia nervosa and impaired visual discrimination learning tend to coexist.
"The primate dopamine system is involved in appetitively motivated behaviors, including certain forms of learning, for example, visual discrimination learning. Furthermore, food restriction in animals and anorexia in humans is associated with impaired dopamine signaling. Based on this, we hypothesized that patients with anorexia nervosa (AN) would show a deficit in visual discrimination learning," according to researchers in, UK.
"In a dynamic categorization task involving the learning of a series of two-alternative forced-choice visual discriminations, conceptually identical to one shown to activate dopamine neurons in primates, and sensitive to dopaminergic manipulations in humans, patients with AN showed a deficit in learning that was most pronounced in the early stages of acquisition," wrote A.D. Lawrence and colleagues, University of Cambridge, MRC.
"In contrast, AN showed spared performance on a pattern ...
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Source: HighBeam Research, Anorexia nervosa and impaired visual discrimination learning tend to...