Human Posterior Cricoarytenoid Muscle Compartments: Anatomy and Mechanics

Bryant, Nancy Jones; Woodson, Gayle E.; Kaufman, Kenton R.; Rosen, Clark A.; Hengesteg, Arne; Chen, Naidy; Yeung, Daniel

doi:10.1001/archotol.1996.01890240039009

Cited by 42 publications

(40 citation statements)

References 18 publications

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“…Even previously, the PCA muscle was thought to be subdivided into 2 bellies, the horizontal and oblique (vertical), 19 as was confirmed by recent results that describe different proportions of fiber types between these compartments. The horizontal compartment is predominantly slow, with 75% to 80% of the fibers being type I, 5,10 whereas the vertical belly has a more even distribution of fast and slow fibers.…”

Section: Introductionmentioning

confidence: 66%

Anatomy and Fiber Type Composition of Human Interarytenoid Muscle

Tellis¹,

Rosen²,

Thekdi³

et al. 2004

Ann Otol Rhinol Laryngol

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Intrinsic laryngeal muscle investigations, especially those of the interarytenoid (IA) muscle, have been primarily teleologically based. We determined IA muscle anatomy and histochemical and immunohistochemical classification of extrafusal and intrafusal (muscle spindle) fibers in 5 patients. Extrafusal fibers were oxidative type I and glycolytic types IIA and IIX. Intrafusal fibers of muscle spindles were identified by the presence of tonic and neonatal myosin. The results demonstrate that the IA muscle has a phenotype similar to that of limb skeletal muscle. Myosin coexpression, the absence of intrafusal fibers, and fiber type grouping were unusual features found previously in the thyroarytenoid and posterior cricoarytenoid muscles, but they were not present in the IA muscle. These findings lead to the conclusion that the IA muscle has functional significance beyond its assumed importance in maintaining vocal fold position during phonation. The presence of spindles demonstrates differences in motor control as compared to the thyroarytenoid and posterior cricoarytenoid muscles. Further, extrafusal fiber characteristics implicate IA muscle involvement in muscle tension dysphonia and adductor spasmodic dysphonia. Given the unique physiologic characteristics of the human IA muscle, further research into the role of the IA muscle in voice disorders is warranted.

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Section: Introductionmentioning

confidence: 66%

Anatomy and Fiber Type Composition of Human Interarytenoid Muscle

Tellis¹,

Rosen²,

Thekdi³

et al. 2004

Ann Otol Rhinol Laryngol

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“…The fibrous tissue dividing the horizontal and vertical bellies of the PCA was identified. 6 This suture was then used to bisect both the horizontal and vertical bellies of the PCA. The lateral portion of the bisected vertical belly of the PCA (from origin to insertion) and the medial (superior) portion of the bisected horizontal belly of the PCA were harvested.…”

Section: Methodsmentioning

confidence: 99%

“…4,5 Anatomical studies have shown a reliable presence of horizontal and vertical components of the posterior cricoarytenoid (PCA) muscle, but minimal information exists regarding the composition and function of these muscle subcompartments. 6 Innervation studies have demonstrated a distinct innervation pattern to different intrinsic laryngeal muscle subcompartments. 7 However, the exact physical and physiologic composition of these PCA subcompartments is not known.…”

Section: Introductionmentioning

confidence: 99%

Muscle Fiber Type Composition and Effects of Vocal Fold Immobilization on the Two Compartments of the Human Posterior Cricoarytenoid: A Case Study of Four Patients

et al. 2003

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SummaryThe human posterior cricoarytenoid (PCA) muscle is divided into two compartments, the vertical and horizontal bellies, which contain differences in their myosin heavy chain (MyHC) composition. Using immunohistochemical techniques on whole PCA samples, this study provides a more thorough description of the fiber type composition of entire bellies of the PCA. Four patients provided complete PCA samples containing both compartments of their right and left sides; two with unilaterally immobilized vocal folds. The horizontal belly had 80% slow (type I) fibers and 20% fast (type II) fibers. The vertical belly contained equal amounts of slow and fast fibers (~55%:45%); clearly distinguishing between two compartments. Atrophy of muscle fibers and fiber type grouping were also present in both normal and affected subjects; providing no clear confirmation of the clinical findings of vocal fold immobilization. Further study of the PCA muscle from patients with unilaterally immobilized vocal folds is needed.

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“…1D) (Maue and Dickson, 1971;Fink, 1975), this has not been observed in humans and may not be feasible given the characteristics of the cricothyroid joint and ligament (Reidenbach, 1995;Hong et al, 2001). Other laryngeal muscles with separate compartments that are likely to have different actions are the lateral and medial portions of the PCA (Bryant et al, 1996) (Fig. 1B) and the lateral and medial portions of the TA (Sanders et al, 1998).…”

Section: Laryngeal Musclesmentioning

confidence: 98%

Central nervous system control of the laryngeal muscles in humans

Ludlow

2005

Respiratory Physiology & Neurobiology

142

104

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Laryngeal muscle control may vary for different functions such as: voice for speech communication, emotional expression during laughter and cry, breathing, swallowing, and cough. This review discusses the control of the human laryngeal muscles for some of these different functions. Sensorimotor aspects of laryngeal control have been studied by eliciting various laryngeal reflexes. The role of audition in learning and monitoring ongoing voice production for speech is well known; while the role of somatosensory feedback is less well understood. Reflexive control systems involving central pattern generators may contribute to swallowing, breathing and cough with greater cortical control during volitional tasks such as voice production for speech. Volitional control is much less well understood for each of these functions and likely involves the integration of cortical and subcortical circuits. The new frontier is the study of the central control of the laryngeal musculature for voice, swallowing and breathing and how volitional and reflexive control systems may interact in humans.

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Human Posterior Cricoarytenoid Muscle Compartments: Anatomy and Mechanics

Cited by 42 publications

References 18 publications

Anatomy and Fiber Type Composition of Human Interarytenoid Muscle

Anatomy and Fiber Type Composition of Human Interarytenoid Muscle

Muscle Fiber Type Composition and Effects of Vocal Fold Immobilization on the Two Compartments of the Human Posterior Cricoarytenoid: A Case Study of Four Patients

Central nervous system control of the laryngeal muscles in humans

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