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用固定的成年尸体研究了１４侧人三角肌各亚部的构筑特征。结果表明，人三角肌各亚部的构筑显著不同。中亚部的生理横切面积最大（２０．５２ｃｍ２），是前亚部的３．５倍，后亚部的５．２倍；而其肌纤维长度（５．５５ｃｍ）及肌纤维长／肌长比率（０．３７）均最小。前、后亚部的肌纤维为平行排列，无羽状角，中亚部为多羽状肌，羽状角平均为１０．４°。我们认为，肌的构筑特征与肌的功能相适应。相对而言，三角肌中亚部倾向于以产生张力为主，是为力量型构筑；而前、后亚部则具有产生更大移位和缩短速度的潜能，倾向于速度型构筑。
The fixed adult cadavers were used to study the framing characteristics of the subdivisions of the 14 lateral deltoids. The results show that the structure of the human deltoid sub-unit significantly different. Central Asia’s largest physiological cross-sectional area (20.52cm2), 3.5 times the previous sub-part, 5.2 times the posterior sub-part; and its muscle fiber length (5.55cm) and muscle fiber length / muscle length ratio (0.37) are the smallest. The anterior and posterior Asian muscle fibers were arranged in parallel with no pinnate angle. In our opinion, muscle building features are compatible with muscle function. Relatively speaking, the central part of the deltoid tends to produce tension mainly in the form of force, whereas the front and rear subparts have the potential to produce more displacement and shorten the speed, which tends to speed-type construction.