Dictionary of Human Evolution and Biology

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Chronic Mountain Sickness

Condition of natives or long-term residents of high altitude characterized by a los of tolerance to hypoxia in a previously acclimatized person, lowered ventilation rate, and a profound increase in secondary polycythemia; symptoms include changes of color, fatigue, headache, episodic stupor, anorexia, nausea, vomiting, and compromised visual acuity.

Cf. acute mountain sickness, altitude sickness.

See acclimatization.

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