The Effect of Thyroxine on Food Intake and Selection

Donhoffer, S; Vonotzky, J.

doi:10.1152/ajplegacy.1947.150.2.334

Cited by 20 publications

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“…Because many measures per unit time of body weight and food intake may be obtained, and because the measures themselves may be more exact than measures of thyroid activity, a more precise description of longitudinal changes may be obtained. Interrelationships of measures of thyroid activity, food intake, and body weight have been found in several species (Donhoffer & Vonotzky, 1947;Reichlin, 1958), andBrown-Grant (1964) states "that the whole of the thyroxin metabolism of the rat may be very closely related to the amount of food it eats [p. 52]."…”

Section: University Of Iowamentioning

confidence: 99%

Lesion-induced dissociations between appetitive and consummatory grooming behaviors and their relationship to body weight and food intake rhythms.

Randall¹,

Lakso²,

Liittschwager³

1969

Journal of Comparative and Physiological Psychology

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Section: University Of Iowamentioning

confidence: 99%

Lesion-induced dissociations between appetitive and consummatory grooming behaviors and their relationship to body weight and food intake rhythms.

Randall¹,

Lakso²,

Liittschwager³

1969

Journal of Comparative and Physiological Psychology

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“…Initially, he directed the Department’s studies to the energetic aspects of nutrition, a field that required only relatively modest material support. 2 But later, he successfully combined this area with another field of energetics: thermoregulation. In one of the papers characteristic of his keen reasoning, he suggested that two conditions that individually are deleterious, protein deficiency and cold exposure, may contribute to increased survival in rats when applied simultaneously.…”

mentioning

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Szilárd Donhoffer (1902–1999)

Szelényi

Székely

2014

Temperature

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“…Repeated measures of body weight and food intake on the same cats are easily obtainable and offer a precision that is difficult to obtain with chronic measures of thyroid activity. Body weight and food intake have been found to vary concomitantly with thyroid activity (e.g., Donhoffer & Vonotzky, 1947). Therefore, body weight and food intake data were collected for a year in a group of normal and brain stem lesioned cats to determine with greater precision the presence of the rhythms and their relationship to the waxing and waning grooming state in cats with brain stem lesions.…”

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Body weight and food intake rhythms and their relationship to the behavior of cats with brain stem lesions

Randall

Lakso

1968

Psychon Sci

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The body weight and food intake rhythms are described in normal and brain stem lesioned cats. The rhythms are similar in both grollps. The lesioned group repeatedly reverts between two behavioral states, and these reversions are related to the direction o/rhythmic change. After brain stem lesions cats spontaneously and repeatedly revert between two behavioral states: the normal state and a "grooming state." In the grooming state isolated fragments of grooming behavior are elicited when light tactile stimuli are applied to the cat's body surface. These grooming fragments are consummatory behaviors which occur in complete isolation from the normally preceding orienting behaviors. The brain stem lesion, then, produces a dissociation between consummatory and appetitive behaviors (Randall, 1964). The occurrence of this abnormal dissociation is periodic, having no relationship to the time of the lesion but rather related to the spontaneous and rhythmic fluctuations in thyroid activity (Randall & Liittschwager, 1967).In order to adequately specify rhythmic fluctuations in thyroid activity or any other variable, repeated measures at equal intervals on the same individuals are required. Repeated measures of body weight and food intake on the same cats are easily obtainable and offer a precision that is difficult to obtain with chronic measures of thyroid activity. Body weight and food intake have been found to vary concomitantly with thyroid activity (e.g., Donhoffer & Vonotzky, 1947). Therefore, body weight and food intake data were collected for a year in a group of normal and brain stem lesioned cats to determine with greater precision the presence of the rhythms and their relationship to the waxing and waning grooming state in cats with brain stem lesions.Method. A year's data of body weight and food intake were obtained on ten male cats. Six of these cats are normal, and four have bilateral stereotaxic lesions in the ventral lateral portions of the brain stem at approximately the level of the lateral lemniscus. The lesions are similar to those previously illustrated (Randall & Liittschwager, 1967).The collection of the body weight and food intake data began at the same time for all cats-a time when the lesioned group had recovered from the acute effects of the surgery. The cats were weighed every two weeks on Saturdays at approximately noon. The food was weighed before it was placed in the cages and the remainder weighed when it was removed. Two types of food constituted the main diet of the cats: (I) Friskies dry cat food which was continuously available, and (2) Friskies canned dog food which was available five days a week (Monday through Friday) from about noon to 5:00 PM. The caloric intake for two-week periods was calculated using the caloric values of the two types of food supplied by the Carnation Company. Small quantities of three special meals were provided each month in place of the canned food: raw pork liver, cooked chicken, and a milk and egg mixture.The caloric contribution of these special meals, whic...

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The Effect of Thyroxine on Food Intake and Selection

Cited by 20 publications

References 0 publications

Lesion-induced dissociations between appetitive and consummatory grooming behaviors and their relationship to body weight and food intake rhythms.

Lesion-induced dissociations between appetitive and consummatory grooming behaviors and their relationship to body weight and food intake rhythms.

Szilárd Donhoffer (1902–1999)

Body weight and food intake rhythms and their relationship to the behavior of cats with brain stem lesions

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