Warning: Undefined array key "mm" in /www/wwwroot/www.ai-bt.com/si.php on line 10 Deprecated: trim(): Passing null to parameter #1 ($string) of type string is deprecated in /www/wwwroot/www.ai-bt.com/si.php on line 10 Beards, baldness, and sweat secretion.

Literature DB >> 3203673

Beards, baldness, and sweat secretion.

Abstract

The hypothesis according to which male common baldness has developed in the human species as a compensation for the growth of a beard in order to achieve heat loss has been tested. In 100 clean-shaven men direct measurement of the area of glabrous skin on the forehead and calvaria was found to be proportional to that of the hairy skin on the lips, cheeks, chin and neck. During light hyperthermia the evaporation rate on the bald scalp was 2 to 3 times higher than on the hairy scalp. Conversely the evaporation rate was practically equal on the foreheads and chins of women and unbearded young men, while in adult clean-shaven bearded men it was 40% less on the chin than the forehead. These results support the hypothesis that male baldness is a thermoregulatory compensation for the growth of a beard in adults.

Entities: Disease Species

Mesh：

Year: 1988 PMID： 3203673 DOI： 10.1007/bf00636601

Source DB: PubMed Journal: Eur J Appl Physiol Occup Physiol ISSN： 0301-5548

19 in total

6. Regional variations in transepidermal water loss, eccrine sweat gland density, sweat secretion rates and electrolyte composition in resting and exercising humans.

Authors: Nigel As Taylor; Christiano A Machado-Moreira
Journal: Extrem Physiol Med Date: 2013-02-01

6 in total

Beards, baldness, and sweat secretion.

1. THE NATURE OF THE INCREASE IN SWEATING CAPACITY PRODUCED BY HEAT ACCLIMATIZATION.

2. Heat losses from the human head.

3. Regional rates of evaporation from the skin at various environmental temperatures.

4. Evolution of cranial blood drainage in hominids: enlarged occipital/marginal sinuses and emissary foramina.

5. Craniofacial Morphology Technique.

6. Sweat gland response to local heating during sleep in man.

7. Hair patterns of scalp of white and Negro males.

Review 8. Brain cooling in endotherms in heat and exercise.

9. Thermoregulatory and blood responses during exercise at graded hypohydration levels.

10. Comparative thermoregulatory responses of resting men and women.

1. Local differences in sweat secretion from the head during rest and exercise in the heat.

2. Sweating distribution and active sweat glands on the scalp of young males in hot-dry and hot-humid environments.

3. Quantification of head sweating during rest and exercise in the heat.

4. Head Cooling Prior to Exercise in the Heat Does Not Improve Cognitive Performance.

5. Does the hair influence heat extraction from the head during head cooling under heat stress?

6. Regional variations in transepidermal water loss, eccrine sweat gland density, sweat secretion rates and electrolyte composition in resting and exercising humans.