Middle pharyngeal constrictor muscle
The middle pharyngeal constrictor is a fan-shaped muscle located in the neck. It is one of three pharyngeal constrictors. Similarly to the superior and inferior pharyngeal constrictor muscles, the middle pharyngeal constrictor is innervated by a branch of the vagus nerve through the pharyngeal plexus. The middle pharyngeal constrictor is smaller than the inferior pharyngeal constrictor muscle.
|Middle pharyngeal constrictor muscle|
Muscles of the pharynx, viewed from behind, together with the associated vessels and nerves (middle pharyngeal constrictor muscle labeled as Mid. constr. at center)
|Artery||Ascending pharyngeal artery|
|Nerve||Pharyngeal plexus of vagus nerve|
|Latin||Musculus constrictor pharyngis medius|
|Anatomical terms of muscle|
It is inserted into the posterior median fibrous raphe, blending in the middle line with the muscle of the opposite side.
As soon as the bolus of food is received in the pharynx, the elevator muscles relax, the pharynx descends, and the constrictors contract upon the bolus, and convey it downward into the esophagus. They also have respiratory mechanical effects.
- Rowe LD, Miller AJ, Chierici G, Clendenning D (August 1984). "Adaptation in the function of pharyngeal constrictor muscles". Otolaryngology–Head and Neck Surgery. 92 (4): 392–401. PMID 6435057.
- Donner, Martin W.; Bosnia, James F.; Robertson, Diane L. (1985). "Anatomy and physiology of the pharynx". Gastrointestinal Radiology. 10 (1): 197–212. doi:10.1007/BF01893103. ISSN 0364-2356.
- Kuna, Samuel T (2000). "Respiratory-related activation and mechanical effects of the pharyngeal constrictor muscles". Respiration Physiology. 119 (2–3): 155–161. doi:10.1016/S0034-5687(99)00110-3. ISSN 0034-5687.
- Its role in speech: Hamaker, Ronald C.; Blom, Eric D. (2003). "Botulinum Neurotoxin for Pharyngeal Constrictor Muscle Spasm in Tracheoesophageal Voice Restoration". The Laryngoscope. 113 (9): 1479–1482. doi:10.1097/00005537-200309000-00010. ISSN 0023-852X.
- Its role in Hyoid bone syndrome: Ernest, Edwin A.; Salter, E. George (1991). "Hyoid bone syndrome: A degenerative injury of the middle pharyngeal constrictor muscle with photomicroscopic evidence of insertion tendinosis". The Journal of Prosthetic Dentistry. 66 (1): 78–83. doi:10.1016/0022-3913(91)90357-3. ISSN 0022-3913.