title: [Intrinsic muscles of the human larynx. Histoenzymological characteristics of the muscle fibers].
abstract: ATPasic, oxidative, and glycogenolytic activities were demonstrated in human laryngeal intrinsic muscles (a total of 15) employing a series of histoenzymatic investigational techniques. Staining methods applied to 10 of the muscles revealed the presence of motor plates on the fibers, either with or without associated ATPase activity. These findings enabled clarification of the different muscle fiber populations, enzymatic equipment, and type of innervation of the laryngeal muscles. Certain of these muscles (cricothyroid, thyroarytenoid, and posterior cricoarytenoid) possess remarkable particularities in relation to known skeletal muscles, and the significance of these features is discussed.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism; D000328:Adult; D006003:Glycogen / Q000378:metabolism; D006651:Histocytochemistry; D006801:Humans; D007821:Laryngeal Muscles / Q000201:enzymology* / Q000294:innervation; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000201:enzymology*; D009218:Myosins / Q000378:metabolism; D010088:Oxidoreductases / Q000378:metabolism
chemical_list: D006003:Glycogen; D010088:Oxidoreductases; D000251:Adenosine Triphosphatases; D009218:Myosins
vernacular_title: Muscles intrinsèques du larynx de l'homme. Caractéristiques histoenzymologiques des fibres musculaires.