By Keshkamat, Tsendbazar, Zuidgeest, Veen, Leeuw
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Extra resources for The Environmental Impact of not Having Paved Roads in Arid Regions
Since the first study by Nakayama and coworkers in 1961 (18), single unit studies have indicated that certain PO/AH neurons are thermosensitive and show changes in their firing rates when Tp 0 is changed, primarily by means of implanted, water-perfused thermodes. Among the temperature-sensitive neurons, the majority have been designated "warm-sensitive," and these increase their firing rates when the Tpo is increased; the others have been called "cold-sensitive," and these increase their firing rates when the T p o is decreased.
The incidence of extrahypothalamic thermosensitivity among populations of (a) warm-sensitive neurons and (b) cold-sensitive neurons. Neurons in each population are grouped according to their firing rates at Tpo 38°C (n = number of neurons). In each group, the proportion of neurons receiving thermal afférents from the skin or spinal cord is indicated by the shaded area. ] FOR THERMOREGULATION 43 receive relatively more inhibitory synaptic inputs from peripheral cold receptors. Experimentally, the first alternative (see Fig.
Each neuron in the diagram represents a population of neurons with similar properties. POH populations 1 and 2 have spontaneous firing rates, and their temperature coefficients differ as indicated. POH populations 3 and 4 do not have spontaneous firing rates and are temperature-independent. B. Firing rate vs. temperature curves of the 4 populations of POH neurons depicted above in 5-5A. A Q JQ of 2 is assumed for population 1, and a Q I Q of 1 for population 2. The firing rates of populations 3 and 4 at any Thy represent the difference between activities of 1 and 2.
The Environmental Impact of not Having Paved Roads in Arid Regions by Keshkamat, Tsendbazar, Zuidgeest, Veen, Leeuw