The syndrome of the impact in the shoulder, represents one me the adaptation to estresses repetitive of one or more activities. This me the adaptation can be structural, functional, or both. Any bone, joint, dynamic neuromusculotendinosa unit, that acts in the waist to escapular or, exactly, the static fibrocartilaginosos stabilizers to articulate, can be implied. Although problems ' ' isolados' ' , as the tendinopatia of the rotador manguito, can occur, is very common that some functional structures and mechanisms are involved, as, bursa subacromial and the tendo of the long portion of the biceps. ' ' tpica' ' injury for extreme use of the shoulder, is, therefore, a composition of some alterations, also with one or more structural injuries, muscular disfunes and imperfections in compensatory mechanisms, each one of which implying in the other. On the basis of the evidence, does not exist an only mechanism of injury for impact, but yes an ample variety of specific factors for the morphologic characteristics and the load history to articulate of each individual.
The patologias of impact, are fit in two ample categories based on the age. The impact in people with less than 35 years of age, is mentioned, habitually, to the sports (former. swimming, handebol, aquatic polar region, baseball, goleiro) or to the occupations (former. carpenter, painter), that they involve extensive movements above of the head. The individuals most aged have greater probability to suffer the effect from the degenerative processes, that result in the formation of ostefitos, adelgaamento to capsular, minor muscular tecidual and hipotrofia perfuso.
All sport that requests the abduo of the shoulder above of 90, results, in the majority of the cases, injury to acrmio-clavicular for repetition. The fall on the shoulder in the soil, the direct trauma, mainly, in the lateral region, also is causes of this injury in the sport. The impact, and the consequent attrition and degeneration of the manguito occur against the edge Antero-inferior of the acrmio during the previous rise of the superior member.