Table 6 - Innervation and actions of laryngeal muscles involved in oropharyngeal swallowing
From the following article
Physiology of oral cavity, pharynx and upper esophageal sphincter
Benson T. Massey
GI Motility online (2006)
doi:10.1038/gimo2
| Functional group | Muscle | Innervation | Site of motor neurons | Function in deglutition |
|---|---|---|---|---|
| Laryngeal | Thyroarytenoid | Recurrent laryngeal nerve (X) | Nucleus ambiguus (X), medulla | Adduct vocal folds |
| Transverse arytenoid | Recurrent laryngeal nerve (X) | Nucleus ambiguus (X), medulla | Adduct vocal folds | |
| Oblique arytenoid | Recurrent laryngeal nerve (X) | Nucleus ambiguus (X), medulla | Adduct vocal folds; aryepiglottic folds | |
| Lateral cricoarytenoid | Recurrent laryngeal nerve (X) | Nucleus ambiguus (X), medulla | Adduct vocal folds | |
| Posterior cricoarytenoid | Recurrent laryngeal nerve (X) | Nucleus ambiguus (X), medulla | Open vocal folds (end of swallow) | |
| Aryepiglottic (not universally present) | Recurrent laryngeal nerve (X) | Nucleus ambiguus (X), medulla | Approximate arytenoids cartilages to epiglottis | |
| Thyroepiglottic | Recurrent laryngeal nerve (X) | Nucleus ambiguus (X), medulla | Lower epiglottis |
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