Muscle Fiber Typing of the Feline Intrinsic Laryngeal Muscles Showing Immunoreactivity to Parvalbumin.

Fukunaga, Hiroyuki; Imamura, Rui; Yoshida, Yoshikazu; Nakashima, Tadashi

doi:10.2468/jbes.49.350

Cited by 1 publication

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“…12 -15 The PAimmunostaining pattern has shown a good correlation with histochemical fiber typing by myofibrillar ATPase in skeletal muscles of rats. 12 ,14 In our previous studies in cats, we have shown that this method can be used to demonstrate the distribution of muscle fiber types in the ILMs 16 and pharyngeal muscles. 17 The purpose of this study was to reveal the subdivisions of the eat's TA according to the distribution of muscle fiber types as determined by PA immunohistochemistry.…”

Section: Introductionmentioning

confidence: 97%

Thyroarytenoid Muscle: Functional Subunits Based on Morphology and Muscle Fiber Typing in Cats

Imamura¹,

Yoshida²,

Fukunaga³

et al. 2001

Ann Otol Rhinol Laryngol

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Using parvalbumin immunohistochemistry to determine the distribution of muscle fiber types in the feline thyroarytenoid muscle (TA), we clearly distinguished the vocalis (with predominance of "slow" type 1 fibers) from the external TA (in which "fast" type 2 fibers predominated, especially in its rostral part). Reconstruction of serial frontal sections of the TA allowed the stereoscopic study of each division. The existence of a rudimentary laryngeal ventricle separating the true and false vocal folds in cats was demonstrated anatomically and histologically, and its relationships to each division of the TA were established. Our results suggest that the vocalis, fitted for enduring activities, is suited for voice control. The fast, rostral part of the external TA seems suited to laryngeal sphincteric demands, while its caudal counterpart may act in both functions. The anatomic individualization of the divisions of the TA may suggest that they play distinct physiological roles and may imply that they should not be considered a single functional unit.

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Section: Introductionmentioning

confidence: 97%