title: Histochemical study of normal human muscle spindle. Histochemical classification of intrafusal muscle fibers and intrafusal nerve endings.
abstract: Normal muscle spindles of human skeletal muscle were studied histochemically. 1) Four histochemical types of intrafusal muscle fibers were classified by ATPase stain: Bag I fiber, Bag II fiber, Chain I fiber and Chain II fiber. Moreover, two types of nuclear bag fibers were classified by NADH Tetrazolium Reductase stain and PAS stain: Bag I fiber and Bag II fiber. 2) Three kinds of fusimotor endings were verified by the cholinesterase technic: en plaque, en grappe and diffuse endings. 3) Two kinds of fusisensory endings were verified by NADH TR stain and also electron-microscopically: primary and secondary sensory endings.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006651:Histocytochemistry; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D009470:Muscle Spindles / Q000378:metabolism* / Q000648:ultrastructure; D009218:Myosins / Q000378:metabolism; D009246:NADH Tetrazolium Reductase / Q000378:metabolism; D010503:Periodic Acid-Schiff Reaction
chemical_list: D009246:NADH Tetrazolium Reductase; D000251:Adenosine Triphosphatases; D009218:Myosins