Trigeminal deafferentation and feeding behavior patterns in the pigeon (Columba livia)

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Data from a study with 11 White Carneaux pigeons show that after an aphagic period, trigeminally deafferented Ss regulated body weight at reduced levels. The deficit involved was characterized by comparing feeding patterns of deafferented and food-deprived birds with equivalent weight losses. Deafferented Ss showed disproportionate increases in meal size during the early portion of the feeding period but abnormally rapid attenuation of feeding activity in the course of the day, which led to a reduced overall level of food intake. Trigeminal input appears to influence both the size of bouts and the frequency of bout initiation. Findings are discussed in relation to the homeostatic model of intake control and within the framework of food conditioning. (31 ref) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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