By Anil Lalwani
Read Online or Download CURRENT Diagnosis and Treatment in Otolaryngology--Head and Neck Surgery: Second Edition (LANGE CURRENT Series) PDF
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Additional resources for CURRENT Diagnosis and Treatment in Otolaryngology--Head and Neck Surgery: Second Edition (LANGE CURRENT Series)
In its lateral wall, the cartilage of the eustachian tube creates a bulge, the torus tubarius, below which is the opening of the tube. Above and behind this bulge lies a depression called the pharyngeal recess. A collection of lymphoid tissue, the pharyngeal tonsil, lies in the posterior wall and the roof of the nasopharynx. Additional lymphoid tissue, the tubal tonsil, is found around the opening of the eustachian tube. A fold of mucous membrane created by the salpingopharyngeus muscle extends down from the torus tubarius.
It communicates with the laryngopharynx above through the laryngeal aditus and with the trachea below. Its lateral walls have two infoldings of mucous membrane, the vestibular folds above and the vocal folds below. The space between the two vestibular folds is called the rima vestibuli, and the space between the two vocal folds is called the rima glottidis. The part of the larynx that extends from the aditus to the rima vestibuli is called the vestibule of the larynx, and the part that lies between the rima vestibuli and the rima glottidis is called the ventricle of the larynx.
Internal thoracic artery—The internal thoracic artery leaves the root of the neck and passes into the thorax, where it supplies blood to the anterior chest wall and eventually to the upper part of the anterior abdominal wall through its superior epigastric branch. 3. Thyrocervical trunk—The thyrocervical trunk gives off the following branches: (1) the inferior thyroid artery, which supplies blood to the thyroid gland; (2) the transverse cervical artery, which passes backward across the neck to supply blood to the trapezius and rhomboid muscles; and (3) the suprascapular artery, which courses laterally across the neck toward the suprascapular notch and participates in the elaborate anastomosis of vessels that surround the scapula.