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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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6 records

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NASA NTRS1975

Responses to preoptic temperature manipulation in the awake and hibernating marmot

Responses of normothermic and hibernating marmots to manipulations of the preoptic-hypothalamic temperature (T-PO) were experimentally investigated. An exponential increase in open-loop gain (OLG) occurred with decreases in temperature; it is concluded that this response can be explained by recruitment of cold-sensitive neurons brought about by low-temperature inactivation of inhibitory neurons. Marmots not only seek out the hibernating state, but also utilize all the thermoregulatory means they possess to remain in it for a given period of time.

South, F. E.↗

NASA NTRS1969

Sleep, hibernation and hypothermia in the yellow-bellied marmot

Computer analysis of cortical and subcortical activity in yellow bellied marmot during sleep, hibernation and hypothermia

Breazile, J. E.↗

NASA NTRS1971

Chronic catheterization and handling procedures for marmots

Autoclave chronic catheter system and restraining box for blood sampling and pressure measurement for hibernating marmots

South, F. E.↗

NASA NTRS1971

A possible basis for periodic arousals during hibernation - Accumulation of ketone bodies

Marmot ketone bodies concentration during activity, deep hibernation and early arousal, discussing increased oxidative metabolism effects

Baumber, J.↗

NASA NTRS1973

Hibernation, sleep, and thermogulation

Nerve activity adaptation to hypothermia and the differences in CNS activity during hypothermia are studied on marmots. Thermoregulatory experiments on hibernating animals indicated a sympathetic response.

South, F. E.↗

NASA NTRS1973

The role of brown adipose tissue in temperature regulation

The thermogenetic capacities of brown adipose tissue were studied on marmots, rats and monkeys in response to cold exposure. All experiments indicated that the brown fat produced heat and slowed the cooling of tissues.

Smith, R. E.↗