目的  为斜方肌亚部的临床应用提供形态学基础。  方法  (1)用肌构筑法对10具成人尸体的斜方肌亚部进行肌构筑学研究。(2)用体视学方法对6具成人尸体的斜方肌亚部进行肌梭分布研究。 结果  (1)斜方肌降部的肌重(30.71±7.40 )g、肌长(10.45±1.62) cm、肌纤维长(9.18±0.99) cm、生理横切面积(3.11±0.72) cm2，水平部的肌重(44.14±10.61) g、肌长(8.65±0.84) cm、肌纤维长(7.14±0.84) cm、生理横切面积(5.89 ±1.66) cm2，升部的肌重(44.89±11.67) g、肌长(11.83±1.12) cm、肌纤维长(9.09±0.94) cm、生理横切面积(5.37±1.55) cm2。(2)斜方肌降部的肌梭密度(39.05±5.08)个/cm3，水平部的肌梭密度(24.48±6.50)个　/cm3，升部的肌梭密度(21.68±6.64)个/cm3。  结论   (1)根据斜方肌各亚部的构筑学特征，推测斜方肌降部和水平部在肩部运动中主要是保持和稳定肩胛骨位置，斜方肌的降部与升部在肩胛骨的旋转中起重要作用。(2)斜方肌降部的肌梭密度明显高于水平部和升部。

        Objective  To provide morphological data for clinical application of compartments of trapezius.  Methods  (1) The muscle architecture method was used to evaluate the muscle architecture features of compartments of trapezius in 10 adult cadavers. (2) The stereology method was used to study muscle spindle distribution of compartments of trapezius in 6 adult cadavers.  Results  (1) The muscle weight (MW), muscle length (ML), fiber length（FL）and physiologic cross sectional area (CSA) of the descending part of trapezius were(30.71±7.40) g,(10.45±1.62)cm,(9.18±0.99) cm and (3.11±0.72) cm2 respectively. These indexes of the transverse part of trapezius were (44.14±10.61) g, (8.65±0.84) cm, (7.14±0.84) cm and (5.89±1.66) cm2 respectively. These index of the ascending part of trapezius were (44.89±11.67) g, (11.83±1.12) cm, (9.09±0.94) cm and (5.37±1.55) cm2 respectively. (2) Spindle density of the descending part of trapezius was 39.05±5.08 number/cm3. Spindle density of the transverse part of trapezius was (24.48±6.50) number/cm3. Spindle density of the ascending part of trapezius was (21.68±6.64) number/cm3.  Conclusions  (1) According to muscle architecture features of trapezius, the descending and transverse parts of trapezius are mainly maintain the position of scapula, and the descending and ascending parts of trapezius are most important in the rotation of scapula presumably. (2) The muscle spindle density of the descending part of trapezius is obviously more than that of the transverse and ascending parts.