![]() ![]() The pharyngeal branch of the vagus nerve via the pharyngeal plexus supplies the superior pharyngeal constrictor muscle. The constrictors contract upon the bolus and transmit it down inside the esophagus.Immediately, the bolus of food is attached in the pharynx: The stylopharyngeus muscle separated its lower margin from the middle constrictor.It acts to propel a bolus downwards along. It is innervated by a branch of the vagus nerve through the pharyngeal plexus. Below the base of the skull, a crescent gap occurs above the muscle in which the auditory tube and the levator as well as tensor veli palatini muscles arise. edit on Wikidata The middle pharyngeal constrictor originates from the greater cornu and lesser cornu of the hyoid bone, and the stylohyoid ligament.Six muscles are predominantly responsible for the voluntary actions of the pharynx: three pharyngeal constrictor muscles that. ![]() It extends from the skull base to the lower border of the cricoid cartilage. The highest fibres are attached to the pharyngeal tubercle of the occipital bone and the lowest fibres are covered from the middle constrictor. The pharynx is a fibromuscular tube that is semicircular in cross section and is situated directly anterior to the vertebral column.Motor and sensory innervation are mainly via branches of the vagus and glossopharyngeal nerves. Figure 5: Posterior view of pharyngeal muscles. Cross section Figure 3: Base of the tongue, superior view. The lymphatics drain directly into the deep cervical nodes, either directly or through the retropharyngeal or paratracheal nodes. Print Figure 1: Cross section of pharynx, esophagus, and larynx. The muscular fibres spread out backwards, and are attached into a raphe outspreading down the posterior wall of the pharynx within the median plane, for the most part. The pharyngeal veins drain into the internal jugular vein.The muscles fibers diverge from their origin: the more inferior fibres descend deep to the inferior pharyngeal constrictor muscle the middle portion of fibres pass transversely the more superior fibers ascend and overlap the superior pharyngeal constrictor muscle. Glossopharyngeus part – From the mucous membrane of the Hoor of the mouth. The middle pharyngeal constrictor is a sheet-like, fan-shaped muscle.Mylopharyngeus part – From the mylohyoid line of the mandible.Buccopharyngeus part – From the pterygomandibular raphe.The superior belly of the omohyoid, one of the four infrahyoid. Pterygopharyngeus part – From the inferior half of the posterior border of the medial lamina of the pterygoid process. The junction between the body of the hyoid bone and the greater cornu is its insertion site.superior pharyngeal constrictor muscle arises continuously: INSERTION Middle portion of pharyngeal raphe. The superior pharyngeal constrictor muscle is innervated by the pharyngeal branch of the vagus nerve via the pharyngeal plexus.The superior constrictor muscle a.k.a. ORIGIN Lower third of stylohyoid ligament, lesser cornu and superior border of greater cornu of hyoid bone. The interval between the upper border of the muscle and the base of the skull is closed by the pharyngeal aponeurosis, and is known as the sinus of Morgagni.Īs 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. The superior fibers arch beneath the levator veli palatini muscle and the Eustachian tube. The fibers curve backward to be inserted into the median raphe, being also prolonged by means of an aponeurosis to the pharyngeal spine on the basilar part of the occipital bone. Origin soft palate (palatine aponeurosis) Insertion. Origin styloid process Insertion pharyngeal wall between superior + middle constrictor. and by a few fibers from the side of the tongue ( Glossopharyngeal part) Origin hyoid + stylohyoid ligament Insertion pharyngeal raphe (fusion of pharyngeal constrictor muscles with partner on contralateral side). middle pharyngeal constrictor origin: hyoid/stylohyoid ligament insertion: pharyngeal raphe innervation: vagus (via pharyngeal plexus) function: constricts wall of pharynx during swallowing stylopharyngeus origin: styloid process insertion: thyroid cartilage with palatopharyngeus innervation: glossopharyngeal nerve (IX) function: elevate. from the alveolar process of the mandible above the posterior end of the mylohyoid line ( Myolopharyngeal part) from the pterygomandibular raphe ( Buccopharyngeal part) the lower third of the posterior margin of the medial pterygoid plate and its hamulus ( Pterygopharyngeal part) The Pharyngeal raphe is a raphe that serves as the origin and insertion for several of the pharyngeal constrictors (thyropharyngeal part of the inferior pharyngeal constrictor muscle, Middle pharyngeal constrictor muscle, Superior pharyngeal constrictor muscle). The four parts of this muscle arise from: ![]()
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