豚鼠环咽肌的组织学和组织化学研究。

Bonington A, Whitmore I, Mahon M

Department of Cell and Structural Biology, Medical School, University of Manchester.

J Anat. 1987 Aug;153:151-61.

Histological, histochemical and morphometric methods were used to investigate the cricopharyngeus muscle in the guinea-pig and to compare it with the extensor digitorum longus and soleus muscles. The cricopharyngeus comprised uniformly small diameter fibres otherwise similar in appearance to those found in skeletal limb muscles. Several fibre type profiles were distinguished within the cricopharyngeus, all of which had homogeneously high oxidative activity, whilst the majority were histochemically fast (Type II). Muscle spindles were not observed in the cricopharyngeus muscles. Compared to the surrounding musculature the cricopharyngeus has a higher oxidative activity and may thus be suitably adapted for the maintenance of tonic contraction, forming a part of the upper oesophageal sphincter.

采用组织学、组织化学和形态计量学方法对豚鼠的环咽肌进行研究，并将其与趾长伸肌和比目鱼肌进行比较。环咽肌由直径均匀较小的纤维组成，外观上与四肢骨骼肌中的纤维相似。在环咽肌中可区分出几种纤维类型，所有这些纤维均具有均匀较高的氧化活性，而大多数在组织化学上为快肌（II型）。在环咽肌中未观察到肌梭。与周围肌肉组织相比，环咽肌具有较高的氧化活性，因此可能适合于维持强直性收缩，构成上食管括约肌的一部分。