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Crawling by definition is using ones knees to propel forward. It is the first gait learned by most humans. Human crawling has similar features to crawling in other primates as well as nonprimate quadropeds, suggesting similar mechanisms.〔Patrick, Susan K., J. Adam Noah, and Jaynie F. Yang. “Interlimb Coordination in Human Crawling Reveals Similarities in Development and Neural Control With Quadrupeds.” Journal of Neurophysiology 101.2 (2009): 603–613. PMC. Web. 23 Mar. 2015.〕 ==When crawls are used== Crawling is used mainly: *When a person cannot yet walk because of being an infant *When a person cannot walk due to disability, being wounded, sick, or drunk *In very low places (caves, under a table, in a mine, etc.). Sometimes underground miners need to crawl long distances during their work *When searching for something on the ground *To get down to the ground in gardening, for maintenance or other work-related purposes which require a good reach on the ground *For stealth (camouflage and quietness) *To lower the field of vision *As an exercise *As a token of submission *For fun or comical purposes *During a fire, crawling may be used because the air near the ground is easier to breathe 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「Crawling (human)」の詳細全文を読む スポンサード リンク
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