Temperature Regulation in the Newborn Infant

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Abstract
MAN thrived earliest and most prolifically in areas of the world with a mean annual temperature close to 21°C. (70°F.).1 His migrations from the 21°C. isotherm were for the most part associated with the development of skills in the use of clothing and shelter to create a temperate microclimate rather than the evolution of unique physiologic mechanisms that permitted him to live in a wide range of climates. Since man compensates for changes in heat balance principally by modifying his behavior, helpless subjects must depend on caretakers to adjust the "private climate" to prevent an inordinate expenditure of metabolic energy . . .