Maier A
Department of Cell Biology, University of Alabama, Birmingham 35294.
J Anat. 1992 Apr;180 ( Pt 2)(Pt 2):233-7.
The results of this study indicate that in serial sections incubated with monoclonal antibodies against MHC and stained for mATPase, intrafusal fibres in chicken leg muscle spindles are separable into slow and fast types. As observed here, fast fibres are a homogeneous group; however, it had been shown earlier (Maier & Zak, 1990) that based on relative amounts of slow MHC, the slow fibres can be further divided into 2 subgroups. These 3 types of intrafusal fibre conform to 3 recently demonstrated patterns of motor innervation (Maier, 1991). It is suggested that the respective actions of slow and fast intrafusal fibres produce different components of the afferent discharge of chicken muscle spindles.
本研究结果表明，在与抗MHC单克隆抗体孵育并进行mATPase染色的连续切片中，鸡腿肌梭内的肌纤维可分为慢肌纤维和快肌纤维两种类型。如本文所观察到的，快肌纤维是一个同质群体；然而，此前已有研究表明（Maier和Zak，1990年），根据慢肌MHC的相对含量，慢肌纤维可进一步分为两个亚组。这三种类型的梭内肌纤维与最近证实的三种运动神经支配模式相符（Maier，1991年）。有人提出，慢肌纤维和快肌纤维的各自作用会产生鸡肌梭传入放电的不同成分。
