[A comparative neurophysiological analysis of thermoregulatory muscle activity in hibernating and nonhibernating animals during the development of hypothermia].
Comparative neurophysiological analysis of the motor units (MU) activity during hypothermia performed in ground-squirrels and rats, revealed a tendency of the MU firing rate to decrease whereas electromyographical patterns of thermoregulatory activity were found to be common both for hibernating and non-hibernating animals. The MU activity ceased in rats at their body temperature of 20-22 degrees C in contrast to 9-5 degrees C in ground-squirrels. Differences in thermoregulatory muscle tone distribution over muscle groups were found between those two species. Some mechanisms of neural regulation of cold shivering and of thermoregulatory muscle tone, are discussed.
Chupakhina
V L
VL
Meĭgal
A Iu
AIu
Lupandin
Iu V
IuV
D000818:Animals; D001831:Body Temperature / Q000502:physiology; D001833:Body Temperature Regulation / Q000502:physiology*; D004576:Electromyography; D005260:Female; D006605:Hibernation / Q000502:physiology*; D007035:Hypothermia / Q000503:physiopathology*; D008297:Male; D009046:Motor Neurons / Q000502:physiology; D009132:Muscles / Q000502:physiology*; D051381:Rats; D012589:Sciuridae; D012768:Shivering / Q000502:physiology
Sravnitel'nyĭ neĭrofiziologicheskiĭ analiz termoreguliatsionnoĭ myshechnoĭ aktivnosti u zimnespiashchikh i nezimnespiashchikh zhivotnykh v protsesse razvitiia gipotermii.