Dr. Ahmed Ibrahim Mohammed Ibrahim Abo-Ahmed :: Publications:

The laryngeal muscles of the balady rabbit were studied macroscopically on twenty healthy adult specimens of different sexes. Ten rabbits were used for studying the extrinsic laryngeal muscles and the others were used for studying the intrinsic laryngeal muscles. The results of the present study revealed that the extrinsic laryngeal muscles included sternothyroid, thyrohyoid and hyoepiglottic muscles. While, the intrinsic laryngeal muscles included cricothyroid, dorsal cricoarytenoid, lateral cricoarytenoid, transverse arytenoid and thyroarytenoid muscles. The sternothyroid muscle was long, originated from the dorsal surface of the rostral half of the sternum and inserted in the longitudinal and transverse ridges of the thyroid lamina. The thyrohyoid muscle was short. It arose from the lateral surface of the thyroid lamina at the longitudinal and transverse ridges and inserted on the medial side of the thyrohyoid bone. The hyoepiglottic muscle was a narrow thin cylindrical muscle. It originated from the dorsal surface of the body of the hyoid bone then passed caudally to be inserted in the basal part of the lingual surface of the epiglottic cartilage. The cricothyroid muscle was quadrilateral in shape. It arose from the longitudinal groove on the cricoid arch and inserted on the caudal border and the longitudinal ridge of thyroid lamina. The dorsal cricoarytenoid muscle was small, covered the dorsal surface of the cricoid lamina. The lateral cricoarytenoid muscle arose from the cricoid arch and inserted on the base of the arytenoid cartilage. The transverse arytenoid muscle consisted of two lateral portions between the two arytenoid cartilages. The thyroarytenoid muscle was nearly triangular and undivided. It originated from the dorsal surface of the body of the thyroid cartilage and inserted in the base of the arytenoid cartilage.