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取５例（男４，女１）２１～３７岁死后１２ｈ内的人尸两侧手肌共１９０块，用肌球蛋白ＡＴＰ酶法，系统研究了手部各肌的肌纤维型分布。结果表明，人类手肌Ⅰ型（慢缩）纤维的平均百分率４４％～６７％。从总体看，手肌中慢缩纤维（总平均为５５．８％）略占优势。其中外侧群Ⅰ型纤维占６１．５％，中间群占５１．９％，内侧群占５７．６％。内、外侧群的慢缩纤维均高于中间群，并存在显著性差异（Ｐ＜０．０５，Ｐ＜０．０１）。在中间群，蚓状肌的Ⅰ型纤维平均为６３．２％，骨间肌为４６．２％，两者间的Ⅰ型纤维百分率在统计学上差异显著（Ｐ＜０．０１）。手内、外侧群的深、浅层间，多数肌Ⅰ型纤维百分率接近。左、右侧别比较，除拇收肌横头和第２骨间背侧肌的Ⅰ型纤维百分率右侧者显著高于左侧者外，其余肌均未见显著的侧别差异。结合肌电图和手的功能，对这些差异的意义进行了分析讨论。
A total of 190 pieces of hand muscles were collected from 5 patients (male 4 and female 1) within 12h after death from 21 to 37 years old. The myofibrillar distribution of each muscle was systematically studied by myosin ATPase. The results showed that the average percentages of type Ⅰ (slow) fibers in human hand muscle were 44% -67%. Overall, slow-defibrillating fibers in the hand muscle (averaging 55.8% overall) predominate. The outer group Ⅰ type accounted for 61.5% of fibers, the middle group accounted for 51.9%, medial group accounted for 57.6%. The medial and lateral systolic slow fibers were higher than the middle group, and there was a significant difference (P <0.05, P <0.01). In the middle group, the average percentage of type I fibers in the lumbar muscle was 63.2% and that in the interosseous muscle was 46.2%. The percentage of type I fibers in the two groups was statistically significant (P <0.01). Hand, the lateral group of deep, shallow, the majority of muscle type Ⅰ fiber percentage close. On the left and right sides, there was no significant lateral difference in the other muscles except the right side of type Ⅰ fiber in the transverse muscle of the adductor muscle and the second interosseous muscle. Combining the functions of EMG and hand, the significance of these differences is analyzed and discussed.