López-Rivero J L, Diz A M, Monterde J G, Agüera E
Departamento de Anatomía y Anatomía Patológica Comparadas, Facultad de Veterinaria, Universidad de Córdoba, España.
Anat Histol Embryol. 1993 Sep;22(3):233-40. doi: 10.1111/j.1439-0264.1993.tb00361.x.
The results from a recent study by Bruce and Schurg (1990) indicate that the gluteus medius (Gm) of the horse is a complex muscle subdivided by an internal tendinous sheet into two regions (dorsal and ventral) which may subserve different functions. In the present study, both regions were found to contain a similar proportion of histochemically-determined muscle fibre types. Fibre type composition did not generally vary over the length of the muscle at the same relative depth. In contrast, there was a significant tendency for the percentage of type I fibres to increase gradually in accordance with depth. These histochemical results do not suggest that the two regions of the Gm assume distinct functional roles; they do, however, indicate that at a given relative depth the muscle fibre type distribution is relatively uniform over the length of the muscle. Nevertheless, care should be exercised in sampling and interpreting data obtained from limited biopsy of equine Gm, due to the substantial histochemical variation of fibre type composition as a function of sampling depth.
布鲁斯和舒格（1990年）最近的一项研究结果表明，马的臀中肌（Gm）是一块复杂的肌肉，被内部肌腱膜分为两个区域（背侧和腹侧），这两个区域可能具有不同的功能。在本研究中，发现两个区域中组织化学确定的肌纤维类型比例相似。在相同相对深度处，纤维类型组成在肌肉长度上通常没有变化。相比之下，I型纤维的百分比有显著的趋势随着深度的增加而逐渐增加。这些组织化学结果并不表明臀中肌的两个区域承担不同的功能作用；然而，它们确实表明，在给定的相对深度处，肌纤维类型分布在肌肉长度上相对均匀。尽管如此，由于纤维类型组成随采样深度的变化存在显著的组织化学差异，在从马臀中肌有限活检获取的数据进行采样和解释时应谨慎。
