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Histochemical fiber types and fiber sizes in human masticatory muscles
Author(s) -
RINGQVIST MARGARETA
Publication year - 1971
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1971.tb02023.x
Subject(s) - masticatory force , biceps , fiber type , anatomy , fiber , muscle fibre , masseter muscle , chemistry , atpase , biology , orthodontics , medicine , biochemistry , skeletal muscle , enzyme , organic chemistry
– Biopsy specimens from the temporalis or masseter muscles of 12 subjects were studied by histochemical means. The fiber sizes in the masticatory muscles were compared with those of the biceps brachii muscle in 4 females. On the basis of staining reactions for ATPase, two fiber types, Type I (low ATPase activity) and Type II (high ATPase activity), were demonstrated. In the masticatory muscles the Type II fibers generally dominated in number and were smaller in diameter than Type I fibers. Both fiber types had smaller diameters than corresponding fiber types of biceps brachii.