"Inability to Belch and Associated Symptoms Due to Retrograde Cricopharyngeus Dysfunction: Diagnosis and Treatment". "Partial Cricopharyngeal Myotomy for Treatment of Retrograde Cricopharyngeal Dysfunction". "Respiratory functions of the inferior pharyngeal constrictor and sternohyoid muscles during sleep". "Function of the Inferior Pharyngeal Constrictor Muscle". "Anatomy, Head and Neck, Pharyngeal Muscles", StatPearls, Treasure Island (FL): StatPearls Publishing,Ī b Yamaoka, Minoru Furusawa, Kiyofumi (May 1997). "Neuromuscular compartments and fiber-type regionalization in the human inferior pharyngeal constrictor muscle". "Postnatal Changes in the Types of Muscle Fibre in the Canine Inferior Pharyngeal Constrictor". ^ Masamitsu Hyodo, Eiji Yumoto, Seiji Kawakita, Takahiko Yamagata ()."Histochemical Study of the Canine Inferior Pharyngeal Constrictor Muscle: Implications for its Function". ^ Hyodo, Masamitsu Aibara, Ryuichi Kawakita, Seiji Yumoto, Eiji ().^ Origin, insertion and nerve supply of the muscle at Loyola University Chicago Stritch School of Medicine.The inferior pharyngeal constrictor muscle may be damaged by chemotherapy-intensity modulated radiotherapy. In extreme cases, this can be related to retrograde cricopharyngeus dysfunction (R-CPD) which causes the inability to burp this is in part due to the muscle not being able to relax.īotox or a cricopharyngeal myotomy are used to treat the condition. Motor incoordination of the cricopharyngeal part can cause difficulty Food or other materials may reside here, which may lead to infection. A diverticulum can form where a balloon of mucosa becomes trapped outside the pharyngeal boundaries. Zenker's diverticulum develops between the two muscular bellies (the thyropharyngeal part and the cricopharyngeal part) in a small gap called Clinical significance Zenker's diverticulumĬricopharyngeal spasm, or impaired relaxation of the inferior pharyngeal constrictor muscle are currently considered the main factors in development of a The inferior pharyngeal constrictor muscle is partially used during The inferior pharyngeal constrictor muscle, along with the other constrictors, contract upon the bolus, and convey it downward into the Pharynx, elevator muscles relax, and the pharynx descends. The inferior pharyngeal constrictor muscle has a broad role in moving the lower part of the The inferior pharyngeal constrictor muscle can merge with superior pharyngeal constrictor, or posterior part of Superior pharyngeal constrictor muscle and the The inferior pharyngeal constrictor muscle is supplied by branches from the It is sometimes referred to as the cricopharyngeal inlet. Upper esophageal sphincter (UES), which controls the opening of the cervical esophagus. The cricopharyngeal part is synonymous with the The inferior fibers are horizontal and continuous with the circular fibers of theĮsophagus the rest ascend, increasing in obliquity, and overlap the The thyropharyngeal part mainly uses type 2 fibres (anaerobic), while the cricopharyngeal part mainly uses type 1 fibres (aerobic). Pharyngeal raphe in the posterior median line of the From the cricoid cartilage, it arises in the interval between theĬricothyroid muscle in front, and the articular facet for the inferior horn of the thyroid cartilage behind.įrom these origins, the fibers spread backward and medially to insert with the muscle of the opposite side into the fibrous.Lamina, from the surface behind this nearly as far as the posterior border and from the On the thyroid cartilage, it arises from the.Thyroid cartilage ( thyropharyngeal part), and the second part arises from theĬricoid cartilage ( cricopharyngeal part). The first part (and more superior) arises from the The inferior pharyngeal constrictor muscle is composed of two parts. The inferior pharyngeal constrictor muscle is a
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