The Constrictor pharyngis superior (Superior constrictor) is a quadrilateral muscle, thinner and paler than the Inferior pharyngealconstrictor muscle and Middle pharyngealconstrictor muscle.
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.
The Constrictor pharyngis medius (Middle constrictor) is a fanshaped muscle, smaller than the Inferior pharyngealconstrictor muscle.
It arises from the whole length of the upper border of the greater cornu of the hyoid bone, from the lesser cornu, and from the stylohyoid ligament.
The fibers diverge from their origin: the lower ones descend beneath the Constrictor inferior, the middle fibers pass transversely, and the upper fibers ascend and overlap the Constrictor superior.
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