![]() ![]() To complete our picture of the pharynx we’ll look at a specimen that’s been divided in the midline. Styloglossus passes downwards and forwards alongside the superior constrictor, and enters the posterior part of the tongue, joining with hyoglossus. ![]() Stylopharyngeus runs down outside the superior constrictor, and passes into the wall of the pharynx between the superior and middle constrictors. The longer one is styloglossus, the shorter one is stylopharyngeus. This strip extends from the upper to the lower border of the cartilage in the middle line, and is distinguished from the laminæ by being more transparent and more flexible.To complete our picture of the upper part of the pharynx, we’ll put the styloid process back, along with two of its three muscles. The inferior cornu is short and thick it is directed downward, with a slight inclination forward and medialward, and presents, on the medial side of its tip, a small oval articular facet for articulation with the side of the cricoid cartilage.ĭuring infancy the laminæ of the thyroid cartilage are joined to each other by a narrow, lozenge-shaped strip, named the intrathyroid cartilage. The superior cornu is long and narrow, directed upward, backward, and medialward, and ends in a conical extremity, which gives attachment to the lateral hyothyroid ligament. It ends above, in the superior cornu, and below, in the inferior cornu. The posterior border, thick and rounded, receives the insertions of the Stylopharyngeus and Pharyngopalatinus. A small part of it in and near the middle line is connected to the cricoid cartilage by the middle cricothyroid ligament. The lower border is concave behind, and nearly straight in front, the two parts being separated by the inferior thyroid tubercle. The upper border is concave behind and convex in front it gives attachment to the corresponding half of the hyothyroid membrane In front, in the angle formed by the junction of the laminæ, are attached the stem of the epiglottis, the ventricular and vocal ligaments, the Thyreoarytænoidei, Thyreoepiglottici and Vocales muscles, and the thyroepiglottic ligament. The inner surface is smooth above and behind, it is slightly concave and covered by mucous membrane. This line gives attachment to the Sternothyreoideus, Thyreohyoideus, and Constrictor pharyngis inferior. The outer surface of each lamina presents an oblique line which runs downward and forward from the superior thyroid tubercle situated near the root of the superior cornu, to the inferior thyroid tubercle on the lower border. ![]() The laminæ are irregularly quadrilateral in shape, and their posterior angles are prolonged into processes termed the superior and inferior cornua. Immediately above it the laminæ are separated by a V-shaped notch, the superior thyroid notch. This prominence is most distinct at its upper part, and is larger in the male than in the female. It consists of two laminæ the anterior borders of which are fused with each other at an acute angle in the middle line of the neck, and form a subcutaneous projection named the laryngeal prominence ( pomum Adami). The Thyroid Cartilage ( cartilago thyreoidea) is the largest cartilage of the larynx. ![]()
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