次要弯曲
Curvaturae secundariae
定义
颈曲和腰曲属于补偿性或次要弯曲,于出生后发育形成:颈曲出现于婴儿能够抬头(三至四个月)及坐直(九个月)之时,腰曲则形成于十二至十八个月婴儿开始行走之时。
參考資料
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).