超生反应阶段人骨骼肌对电刺激反应的形态学研究

利用人骨骼肌在死亡早期阶段能对电刺激产生兴奋和收缩的特点，以加大刺激强度为手段，对18例死亡早期阶段（1小时25分至6小时40分）具有超生反应能力的尸检骨骼肌和17例稍晚阶段（10～60小时）不具有超生反应能力的尸检骨骼肌，进行了电刺激损伤的系列形态学对比研究。结果表明，死亡早期阶段的肢体骨骼肌，经电刺激后，能产生整个肌肉或局部肌肉的收缩；在电极周围以及电路中的肌纤维形成大片的极具特点的收缩带、条带状嗜酸性变、高度变形的节段状和盘片状崩解等改变；稍晚期阶段受刺激的肌纤维则未见上述改变。探讨形态学改变的形成机理及意义，为研究死亡早期阶段的电损伤提供形态学基础。

A morphlogical study of the electrical injury of skeletal muscle in the postmortem supravital period

In view of the fact that the skeletal muscle still keep its contractive reactivity in the early postmortal period we performed a systemic comparative morphological study of the skeletal muscles of 18 cases with supravital reactivity in the early postmortal period (1.25hpm to 6. 40hpm after death) with that of another 17 cases without supravital reactivity in the later postmortal period (10~60h after death) with the aid of a stronger electric irritation. The results showed that the arm muscles of the former group revealed a contraction of the whole or a part of the irritated muscles which showed formation of characteristic contraction-bands and bandshaped acidophilic altermation and segmented as well as diffuse massive disintegration of the muscle tissue while such changes were not seen in the latter group. The mechanism and the significance of these changes would be discussed and it should be a morphological basis for the further study of electric injury of skeletal muscle in the early postmortal period.