The objective of the present study was to estimate the influence of the position of an upper extremity on the formation of wound canals resulting from the injury to the scapular region and the chest. The secondary objective was to substantiate the possibility of the detection of the position of the upper extremity at the time of wound infliction. A few series of experiments were carried out with the differently positioned upper extremities. They allowed to determine: 1) the degree of tissue displacement in the scapular and thoracic regions, 2) disjunctive (discontinuous) dislocation of the wound canal, and 3) the possibility to detect the relative position of the upper extremity at the time of wound infliction in the scapular region.