It receives oxygen-rich blood from a secondary branch of the superior thyroid artery, which arises from the common carotid.īelow, drawing of deep muscle of neck, exhibiting the inferior pharyngeal constrictor. This pharyngeal muscle is innervated by the branches from the paryngeal plexus. The inferior pharyngeal constrictor narrows the lower part of pharynx during deglutition (swallowing). Its superior ascending portion overlaps the middle constrictor muscle. The communication between these nerves may. It is inserted into the pharyngeal raphé in the posterior median line of pharynx.Īlso called inferior constrictor muscle, it is covered by the buccopharyngeal fascia, which is a thin membrane that envelops the pharynx. The inferior constrictor is innervated by the pharyngeal plexus and the external and recurrent laryngeal nerves. The upper aspect of the middle constrictor partially covers the lower part of the superior pharyngeal constrictor. Muscle fibers insert at the median pharyngeal raphe and blend with the fibers of inferior and superior constrictors. Definition Pharyngeal constrictors and longitudinal muscles Attachments Arteries Nerves Function Sources + Show all Definition The pharynx is a muscular column that begins in the head posterior to the nasal cavity, travels inferiorly behind the oral cavity before finally merging with the larynx and esophagus. Then it extends backwards and upwards, in an oblique fashion, as it becomes wider. Previous anatomical studies have sought to ascertain the morphological and muscular properties of the inferior pharyngeal constrictor muscle adjacent to the. Middle pharyngeal constrictor - originates from both horns of the hyoid bone and the stylohyoid ligament. The inferior pharyngeal constrictor (IPC) originates from the thyroid and cricoid cartilages and inserts to the pharyngeal raphe. It is a submucosal plane, located between the mucosa and muscularis layers. The pharyngobasilar fascia lies between the levator and tensor veli palatini muscles 7. It originates from the lateral surface of cricoid cartilage, the side of the wing of thyroid cartilage, and the inferior cornu. inferiorly: superior pharyngeal constrictor muscle anteriorly: posterior border of medial pterygoid plate posteriorly: midline pharyngeal raphe Relations and/or Boundaries. Being broad, it lies across the lateral aspect of larynx and proximal portion of esophagus and trachea. Like the pharyngeal phase, this process is involuntary. The inferior pharyngeal constrictor is one of the three constrictor muscles of the human pharynx.
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