A prize essay on the anatomy of the tongue, larynx, and pharynx of the ox / by Joseph Sampson Gamgee.

  • Gamgee, Sampson, 1828-1886.
Date:
1850
Catalogue details

Licence: Public Domain Mark

Credit: A prize essay on the anatomy of the tongue, larynx, and pharynx of the ox / by Joseph Sampson Gamgee. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    anteriorly it is in contact with the glandular structure of the velum palati; and, internally, with the insertion of the stylo- pharyngeus. The hyo-pharyngeus (dilator) arises from the under surface of the greater cornu of the os-hyoides just above its middle. It bifurcates in its downward course ; one portion becomes implanted into the upper and anterior part of the thyroid caitilage, while the other slip of the muscle passes downwards and forwards to the under part of the pharynx. Tliis muscle is related internally to the glosso-pharyngeus nerve, and anterior constrictor of the pharynx ; inferiorly and externally with thehyoideus parvus, and the tendinous insertion of thehyoideus magnus. Of the three pairs of pharyngeal constrictors the first is the hyo-pharyngeus. This muscle may be distinguished into one main portion and several accessory fasciculi. The main portion of tlie muscle arises from the body of the os hyoides, and passes in a slightly oblique line upwards and forwards, to meet its fellow on a median line at the posterior part of the pharynx, where it receives some secondary fasciculi; one fasciculus proceeds upwards and back- wards from the posterior margin of the middle and greater cornu across the hyoideus parvus, and then bifurcates, one portion of which goes to the under surface of the hyo-pharyngeus, while the other continues along its anterior border. The three other fasciculi, arising from the lower surface of the greater cornu of the hyoid bone, continue to the under part of the hyo-pha- ryngeus. This muscle is related at its origin to the hyoideus parvus and magnus; and internally to the hyo-pharyngeus (dilator) and glosso- pharyngeal nerve. Thyro-pharyngeus.—From the upper and outer surface of the thyroid cartilage its fibres ascend to blend with those of the opposite muscle. From its relative situation with the two other constrictors, the thyro-pharyngeus is also called the constrictor pharyngeus medius. The crico-pharyngeus, or posterior constrictor of the pharynx, arises from the cricoid cartilage, and converges towards the raphe on the roof of the pharynx. It is in connexion posteriorly and laterally with the thyroid body ; and postero-superiorly with the