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Prehistoric medicine is any use of medicine from before the invention of writing. Because the timing of the invention of writing varies per culture and region, the term "prehistoric medicine" encompasses a wide range of time periods and dates. The study of prehistoric medicine relies heavily on artifacts and human remains, and on anthropology. Previously uncontacted peoples and certain indigenous peoples who live in a traditional way have been the subject of anthropological studies in order to gain insight into both contemporary and ancient practices.〔(【引用サイトリンク】 url = http://www.wpro.who.int/health_topics/traditional_medicine/ )〕 == Disease and mortality == Different diseases and ailments were more common in prehistory than today; there is evidence that many people suffered from osteoarthritis, probably caused by the lifting of heavy objects which would have been a daily and necessary task in their societies. For example, the transport of latte stones, though this practice only started during the neolithic era which involved hyper extension and torque of the lower back, while dragging the stones, may have contributed to the development of micro fractures in the spine and subsequent spondylolysis. Things such as cuts, bruises, and breakages of bone, without antiseptics, proper facilities, or knowledge of germs, would become very serious if infected, as they did not have sufficient ways to treat infection.〔(【引用サイトリンク】 url = http://www.britishempire.co.uk/boniface/humanities/history/year10/prehistoric.htm )〕 There is also evidence of rickets, bone deformity and bone wastage (Osteomalacia),〔(【引用サイトリンク】 url = http://www.revolutionaryplayers.org.uk/article_01_01.stm )〕 which is caused by a lack of Vitamin D. The life expectancy in prehistoric times was low, 25–40 years,〔SHP: Medicine & Health Through Time〕 with men living longer than women; archaeological evidence of women and babies found together suggests that many women would have died in childbirth, perhaps accounting for the lower life expectancy in women than men. Another possible explanation for the shorter life spans of prehistoric humans may be malnutrition; also, men as hunters may have sometimes received better food than the women, who would consequently have been less resistant to disease.〔(【引用サイトリンク】 url = http://www.healthguidance.org/entry/6303/1/Prehistoric-Medicine.html )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Prehistoric medicine」の詳細全文を読む スポンサード リンク
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