A histochemical study was carried out of the cricothyroid, posterior cricoarythenoid, lateral cricoarythenoid and vocalis muscles from two laryngectomized patients. Fibre types were identified according to the criteria used for routine limb muscle histochemistry. Muscle fibre size was considerably smaller than that of skeletal muscles and the variability in the size of fibres, as reflected in the histograms, was increased. In contrast to the well-known equal distribution of the three fibre types in limb muscles, the laryngeal muscles examined showed type 1 and type 2A equally represented in 90% of all fibres, type 2B making up no more than 10% of the total. Although in animal studies individual muscles differed in their fibre type composition, the above distribution was constant in the human specimens in all muscles.
|Number of pages||6|
|Journal||Cellular and Molecular Biology|
|State||Published - 1981|