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The impulse activity of 184 single motor units of the sartorius muscle was investigated in anesthetized cats during cold tremor. Motor units whose impulse activity was connected with respiration cycles and motor units functioning independently of respiration were detected. The functions of both types of the motor units are characterized by the same average(More)
The electrical activity of single motor units of the cat m. sartorious during the preshivering tone and shivering tremor revealed a steady frequency 5--10/sec. The transition from preshivering tone to shivering tremor involved recruitment of motor units with similar properties: the low--threshold units. The response of motor units to local thermal stimuli(More)
When equal amounts of cooling were applied to the skin of rabbits the heat production and heat loss elicited by means of convection had shorter latencies and were by 40 to 50 per cent more pronounced that those elicited by radiation. The correlation of the thermoregulatory reactions with the skin temperature was more stable in experiments with convective(More)
Discharges of 184 motor units of the sartorius muscle functioning during cold tremor were investigated in acute experiments on anesthetized cats. Units whose discharges correlated with respiration cycles and units functionally independent of the rhythm of respiration were discovered. Discharges of both types of motor units possessed the same mean frequency(More)
In rabbits, impulse activity in cooling through convection was 8 times as great as in cooling through radiation. The former cooling increases impulse activity twofold as compared to the radiation cooling in hairless areas. Changes in impulse activity of fibers of the cutaneous nerve were characterized by considerable fluctuations of rhythm and an increase(More)
In rabbits, application of ice-cold water to the ear lowers the skin temperature by 10.3 degrees C and, within 3-4 sec, the temperature in the subcutaneous vein by 4.3 degrees C. A stepwise cooling of isolated subcutaneous artery or vein causes their constriction, and warming dilates the vessels with maximal amplitude when the temperature is changed by 8-12(More)
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