Morphological fiber types of retractor bulbi muscle in mouse and rat.
Retractor bulbi muscles of mouse and rat were examined by light and electron microscopy. Two morphological fiber types were observed, analogous to Type I and Type II cells of skeletal musculature and comparable to fibers observed in the global region of the rectus extraocular muscles of these species.
D000818:Animals; D001369:Axons / Q000648:ultrastructure; D002415:Cats; D008116:Lizards; D051379:Mice; D008928:Mitochondria / Q000648:ultrastructure; D009469:Neuromuscular Junction / Q000648:ultrastructure; D009801:Oculomotor Muscles / Q000648:ultrastructure*; D011817:Rabbits; D051381:Rats; D012519:Sarcoplasmic Reticulum / Q000648:ultrastructure