Humerus fracture also cause deformity, and they typically limit the ability to flex the elbow. Humerus fractures usually occur after physical trauma, falls, excess physical stress, or pathological conditions. Falls that produce humerus fractures among the elderly are usually accompanied by a preexisting risk factor for bone fracture, such as osteoporosis, a low bone density, or vitamin B deficiency. Proximal humerus fractures most often occur among elderly people with osteoporosis who fall on an outstretched arm. Less frequently, proximal fractures occur from motor vehicle accidents, gunshots, and violent muscle contractions from an electric shock or seizure. Other risk factors for proximal fractures
Traditional Chinese medicines derived from the human body pharmacopoeias continue to list human drugs. Within their sample of 8 human drugs, prescriptions mention two dozen symbolic ritual procedures (1973: 265). Sympathetic magic, for example, could explain using blood to treat blood loss (52.17.3 above) and attempting to treat bone damage with bone (52.27.1). Li Shizhen quotes the (9th century) "Miscellaneous Morsels from Youyang". The book "Youyang Zaju": Once a military man in Jingzhou had an injured tibia. Doctor Zhang Qizheng treated him with a kind of medicinal wine, which was taken orally. A small segment of broken bone in the wounded tibia was taken out and a kind