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Biomedical subjects

M Cabanac

Publications and source records attributed to M Cabanac.

At least 163 records · Page 9Linked to original sources

Obesity: absence of satiety aversion to sucrose.

In obese subjects, ingestion of glucose did not cause the transformation of the gustative sucrose sensation from pleasant to unpleasant as in normal subjects. This result is consistent with the theory of a decreased sensitivity to internal signals in the control of food intake of obese people.

Feeding Behavior↗

Tiliqua scincoides: temperature-sensitive units in lizard brain.

Extracellular action potentials were recorded from units in the preoptic area of the brain of the Australian blue-tongued skink (Tiliqua scincoides) during periods of local heating and cooling of the brain (20 degrees to 36 degrees C) with water-perfused thermodes. In this temperature range most spontaneously firing neurons were temperature-insensitive, but eight showed sensitivity to the thermal stimulus. Five warm neurons increased their activity when the brain temperature was raised, and three cold neurons showed increased activity with fall in temperature.

Action Potentials↗

Fever and tachycardia in a bird (Gallus domesticus) after simple handling.

Three Gallus domesticus cocks were reared separately in a climatic chamber at 22 degrees C, with lights on at 0600 and off at 1800 h. Food and water were available at all times. At noontime, one bird was handled for the purpose of taking cloacal, comb, and foot temperatures every 3 min for 18 min. Repeated handling produced a fever characterized by a mean rise in core temperature from 41.1 +/- 0.3 degrees C to 41.6 +/- 0.3 degrees C and an initial peripheral vasoconstriction, as shown by a drop in skin temperatures. Maximum core temperature was only 39.9 +/- 0.2 degrees C when the birds received intraperitoneal salicylate 1 h before handling. It is concluded that handling causes a fever in birds. The birds were equipped with an electrocardiogram radio transmitter, and their heart rates were recorded at a distance. When simply touched by an experimenter, the birds' mean heart rate rose from 198 +/- 6 to 249 +/- 15 beats/min. We conclude that fever and tachycardia might indicate the existence of emotion in birds.

Analysis of Variance↗