Kinesiology 2236A/B Lecture Notes - Lecture 22: Humerus, Metaphysis, Buckling
27 Mar 2017
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Document Summary
Bone review: skeletal immaturity will bring up many different injuries, long bone growth occurs at each end, around the epiphyseal (growth) plates, also have growth plates where tendons attach to bones aka. Apophysis: the epiphyseal plate is 2-5 times weaker than the surrounding bone. 15% to 30% of all childhood fractures are growth plate fractures. If fracture goes right through growth plate its hard to tell. Anatomical differences between adult and growing bones: junction between growth plate and metaphysis is vulnerable. Physis 2-5x weaker than adjacent capsule or ligamentous structure. Periosteum is a major support through this area. Typically, due to shear/rotation force and compression. Can be acute or from repetitive forces. Little league shoulder: stress fracture of the proximal epiphyseal plate of the humerus (11-16 year olds, release-tension stress vs. rotational stress, pain in dominant shoulder of athlete (tennis and volleyball too) Treatment is abstinence from throwing for 4-6 weeks: healing occurs uniformly.
