The topographical anatomy of the head and neck of the horse / [O. Charnock Bradley].
- Orlando Charnock Bradley
- Date:
- 1923
Licence: In copyright
Credit: The topographical anatomy of the head and neck of the horse / [O. Charnock Bradley]. Source: Wellcome Collection.
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![of the artery. In addition, the transverse facial, reHe.K and buccinator veins communicate with the facial. At the ])resent moment, however, no attempt should be made to follow these three vessels, but their connection with the facial mav be determined by slisfhtlv raisins' the border of the masseter muscle. At the border of the mandible the facial vein becomes the external maxillarv. The parotid duct (Ductus parotideusj.—The formation of the parotid duct by the union of radicles at the anterior ventral angle of the gland has already been noted, as has also its course across the tendon of the sterno-cephalic muscle into the space between the two halves of the mandible. The association of the duct with the external maxillary vein and artery—the duct being the most ventral of the three structures—has been observed. The duct leaves the space by following the margin of the mandible for a short distance, and then turns upwards on to the face. Its course up the face is at first between the edge of the masseter muscle and the facial vein ; but it soon bends forwards between the buccinator muscle and the facial vessels, and disappears by piercing the muscle obliquely. Later, the opening of the duct will be found within the cheek at the summit of a low papilla (papilla salivalis) on a level with the anterior part of the third upper cheek tooth (fourth maxillary premolar). A, TRANSVERSA FACIEI.—The transverse facial artery arises from the superficial temporal underneath the parotid gland, and, in the present dissection, appears between the gland and the border of the ramus of the mandible just below the condyloid process of the bone. The vessel runs at first on the surface of the masseter muscle close to the facial crest, but before the level of the orbit has been reached it sinks into the substance of the muscle. Terminal twigs anasto¬ mose with small branches of the facial artery. V. TRANSVERSA FACIEI.—The transverse facial vein follows the upper border of the artery of the same name. The anterior part of the vein pierces the masseter muscle very obliquely and joins the facial vein. This union will be revealed when the masseter comes to be examined. A. MASSETERICA.—-The masseteric artery will be found at the anterior border of the parotid gland, running along the posterior border of the masseter muscle, into which it disappears. It is a branch of the external carotid artery, and reaches the face by bending round the margin of the mandible, just above the insertion of the sterno-cephalic](https://iiif.wellcomecollection.org/image/b29820066_0055.jp2/full/800%2C/0/default.jpg)
