<i>Tiliqua scincoides</i>
            : Temperature-Sensitive Units in Lizard Brain

Cabanac, Michel; Hammel, T.; Hardy, James D.

doi:10.1126/science.158.3804.1050

Cited by 62 publications

(19 citation statements)

References 4 publications

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“…Thus, the temperature coefficients of warm-units in the new-born rat are about one tenth of those of warm-units in adult mammals. Rather, they are comparable to those of warm-units found in the preoptic and anterior hypothalamic areas of the Australian blue-tongued skink (Cabanac, Hammel & Hardy, 1967), which were between + 0*09 and + 1.0 impulses/sec. 'C.…”

Section: Presented Inmentioning

confidence: 61%

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Hypothalamic thermo‐responsive neurones in the new‐born rat.

Hori¹,

Shinohara²

1979

The Journal of Physiology

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SUMMARY1. Single unit activities were recorded from the neurones in the preoptic area and anterior hypothalamus of developing new-born rats (aged 1-24 days old) during thermal stimulation of the brain. During the first 2 weeks of life, about 80 % of these neurones had low spontaneous firing rates between 0.1 and 5 impulses/sec at 38 0C hypothalamic temperature (Thyp).2. Out of 640 units studied, 118 units increased the firing rate upon elevation of ThyP (warm-units) and fourteen showed the opposite type of response to temperature changes (cold-units),. Warm-units were founcli the rats of all the age span studied and cold-units were recorded in the rats more than 8 days old.3. Thermal coefficients of warm-units and cold-units varied between +0i11 and +2-47 and between -0.10 and -0*49 impulses/sec. 0C, respectively. Number of warm-units with higher rates of firing and greater thermal coefficients, comparable to those of warm-units in the adult, gradually increased with growth. The thermal responsiveness of warm-units, when expressed by Q10, are already high even in the immediate neonatal period. Their Q10 values were in the range between 2 and 38X5 (mean 6.4).4. Units responding to extrahypothalamic temperatures were only found in the rats more than 14 days old.5. All the six warm-units tested increased the firing rates following subcutaneous injections of capsaicin, while the majority of thermo-unresponsive units were not affected by this drug.6. It is suggested that thermo-responsive neurones in the preoptic area and anterior hypothalamus in the new-born rat have attained some degree of electrophysiological maturity, despite their slowly firing characteristics.

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Section: Presented Inmentioning

confidence: 61%

“…Again, temperature coefficients of cold-units in the new-born rat are similar to those of units in the skink, which ranged between -0-26 and -0 7 impulses/sec. 0C (Cabanac et al 1967). Henderson et al (1971) have reported the absence of thermo-responsive neurones in preoptic and anterior hypothalamic areas of 5-12 day old rabbits.…”

Section: Presented Inmentioning

confidence: 99%

Hypothalamic thermo‐responsive neurones in the new‐born rat.

Hori¹,

Shinohara²

1979

The Journal of Physiology

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“…It is also known to be a thermoregulatory center of non-mammalian vertebrates, and temperature-sensitive neurons have been reported in POA of fish and reptiles (Cabanac et al, 1967;Nelson and Prosser, 1979;Prosser and Nelson, 1981). demonstrated a role of the POA in the behavioral fever induced by LPS in toads Bufo paracnemis.…”

Section: Evolutionary Conserved Mechanisms Existing Between Fever Of mentioning

confidence: 94%

Behavioral fever in ectothermic vertebrates

Rakus

Ronsmans

Vanderplasschen

2017

Developmental & Comparative Immunology

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a b s t r a c tFever is an evolutionary conserved defense mechanism which is present in both endothermic and ectothermic vertebrates. Ectotherms in response to infection can increase their body temperature by moving to warmer places. This process is known as behavioral fever. In this review, we summarize the current knowledge on the mechanisms of induction of fever in mammals. We further discuss the evolutionary conserved mechanisms existing between fever of mammals and behavioral fever of ectothermic vertebrates. Finally, the experimental evidences supporting an adaptive value of behavioral fever expressed by ectothermic vertebrates are summarized.

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“…The literature indicates that other lizard species possess thermal sensors both at their periphery [Cabanac and Hammel, 1971] and in their body core [Cabanac et al, 1967;Myhre and Hammel, 1969]. Various lizard species are able to regulate their cloacal temperature behaviorally in their natural environment and under experimental conditions [Cowles and Bogert, 1944;Hammel et al, 1967;De Witt, 1967;Heath, 1970;Regal, 1971;Avery, 1972Avery, , 1985Garrick, 1979].…”

Section: Discussionmentioning

confidence: 99%

Behavior of Juvenile Lizards <i>(Iguana iguana) </i>in a Conflict between Temperature Regulation and Palatable Food

Balaskó

Cabanac

1998

Brain Behav Evol

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Juvenile green iguanas were placed in a situation of conflict between two motivations: a thermoregulatory drive and the attraction of a palatable bait. To be able to reach the bait (lettuce), they had to leave a warm refuge, provided with standard food, and venture into a cold environment. In experiment 1 the time interval between sessions with bait, ranging from 1 to 8 days, had no effect on the duration of stay on the bait. This result shows that the lettuce was not a necessary food, deprivation of which would have had to be compensated for. In experiment 2 as the ambient temperature at the bait decreased the lizards spent less time feeding on lettuce, and they visited the bait less frequently. This result shows that the lizards traded off the palatability of the bait with the disadvantage of the cold. These findings support the hypothesis that a common currency makes it possible for lizards to compare two sensory modalities.

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Tiliqua scincoides : Temperature-Sensitive Units in Lizard Brain

Cited by 62 publications

References 4 publications

Hypothalamic thermo‐responsive neurones in the new‐born rat.

Hypothalamic thermo‐responsive neurones in the new‐born rat.

Behavioral fever in ectothermic vertebrates

Behavior of Juvenile Lizards <i>(Iguana iguana) </i>in a Conflict between Temperature Regulation and Palatable Food

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