Practical anatomy: a manual of dissections / by Christopher Heath.

  • Christopher Heath
Date:
1870
Catalogue details

Licence: Public Domain Mark

Credit: Practical anatomy: a manual of dissections / by Christopher Heath. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

    475/600 (page 465)
    on the dorsum of the tongue, and behind the papiJIae circum- valla/a' are numerous compound racemose lingual glands which lubricate the posterior portion of the organ. Beneath the mucous membrane is a fibrous layer or corion, which gives attachment to many of the muscular fibres. In the centre of the tongue and dividing it into two symmetrical halves is a fibrous septum, the existence of which is marked b}^ a raphe in the median line. The Intrinsic Muscles are the Lingualis Superior, the Lingualis Trausversus, and the Lingualis Inferior. [Thej^ can be well seen, with the lingual artery, in a slice of beef's tongue on the table.] The Lingualis Superior extends along the surface of the tongue immediatel}^ beneath the mucous membrane, being connected with the septum internally. The Lingualis Trausversus constitutes the chief bulk of the tongue, and is placed beneath the lingualis superior. Its fibres are attached to the median septum ancl pass outwards to the mucous membrane, giving passage to the ascending fibres of the lingualis inferior. The Lingualis hiferior is to be seen on the under surface of the tongue by reinoving the hj'-o-glossus. It is larger than the lingualis superior and extends along the under surface of the tongue, giving ascending fibres which pass between those of the transverse muscle, and being closely connected with the st^do-glossus muscle. Glands of the Frsenum (Blandin).—By removing the mucous membrane on the under surface of the tongue near the tip a couple of oval glands may be seen. They are similar in structure to the sublingual glands, although dis- tinct from them, and are sometimes united in front, forming a single mass of an arched form (Deville). The Nerves (Fig- 182, p. 390) of the tongue have been already examined, but may now be followed out minutely. They are the Hypoglossal nerve (9th) [12th, S.] to the muscular structure of the tongue; the Lingual nerve (5th) to the fungiform and filiform papilla on the dorsum and apex of the tongue; the Glosso-p)ha7'ijngeal nerve (8th) [9th, S.] to the circumvallate papillae at the base of the tongue and to the surface behind them. The Larynx, The Larynx or organ of voice is closely connected with the hyoid bone and tongue. On tracing the mucous