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Laboratory 31. Pharynx
Step 10. The Pharyngeal Constrictor Muscles

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The superior pharyngeal constrictor muscle [cross-section] attaches to the lower part of the posterior border of the medial pterygoid plate, to the pterygomandibular raphe, to the highest part of the mylohyoid line on the inner surface of the mandible, and to the root of the tongue between the genioglossus and hyoglossus muscles. Most of the fibers of this muscle insert into the median pharyngeal raphe. The inferior portion of the superior constrictor muscle is overlapped superficially by the fibers of the middle pharyngeal constrictor muscle. In the superior and posterior aspect of the pharyngeal wall, fibers of the superior constrictor muscle insert only onto the pharyngeal tubercle of the occipital bone. The superior and lateral aspect of the pharyngeal wall is devoid of muscle fibers and is formed only by a thickening of the pharyngobasilar fascia.

Links and References:
Grant's: 8.57
Netter: 61
Rohen/Yokochi: 161