Abstract
It is well known that mammalian extraocular muscle (EOM) contains multiply innervated fibers (MIF) in addition to those with single innervation (SIF). There is general agreement that nerve endings on the SIF are not significantly different from end plates of the peripheral musculature. While the neuromuscular junctions on MIF are usually described as being small and superficial, light microscopy of rabbit (1) and rat (2) EOM indicates that both large and small endings may occur on MIF. An EM study of rat EOM (2) suggests that the large endings on MIF are essentially a tight grouping of superficial endings with minimal junctional folding. In the present study of rabbit EOM, end-plate-like endings were observed on MIF in addition to numerous more or less superficial neuromuscular junctions. The m. superior rectus of New Zealand white rabbit was prepared by standard methods, and embedded whole in Epon 812.
Published Version
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