Nerve endings on the intramuscular tendons of cat extraocular muscles.

The extraocular muscles of the cat have been studied with silver-impregnated, teased preparations. Short and long muscle fibers have been found among the multi-innervated as well as among the focally-innervated muscle fibers. The attachments between the short fibers are made by intramuscular tendons. Longer fibers may have myomyal bridges. A peculiar kind of nerve ending has been found on the intramuscular tendons of short multi-innervated fibers. These endings are supplied by myelinated axons which also give endings to the muscle fibers. The significance of these nerve endings is discussed.