. Anatomie, descriptif et appliquée. L'anatomie. La sixième OU ABDUCENT 993 nerf est rincé en tde ouverture à l'angle extérieur à des intervalles fréquents. Les points sont retirés du couvercle dans de huit à dix jours. Le nerf lingual est parfois divisée en vue de soulager la douleur de la maladie cancéreuse de la langue. Cela peut être fait dans cette partie de son cours où il se trouve ci-dessous et en arrière de la dernière molaire. Si une ligne est tracée à partir du milieu de la couronne de la dernière molaire à l'angle de la mandibule, il va traverser l'audace, qui se trouve à environ un demi-pouce derrière la dent,

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. Anatomy, descriptive and applied. Anatomy. THE SIXTH OR ABDUCENT NERVE 993 is flushed into tde opening at the external angle at frequent intervals. The stitches are removed from the lid in from eight to ten days. The lingual nerve is occasionally divided with the view of relieving the pain in cancerous disease of the tongue. This may be done in that part of its course where it lies below and behind the last molar tooth. If a line is drawn from the middle of the crown of the last molar tooth to the angle of the mandible, it will cross the nerve, which lies about half an inch behind the tooth, parallel to the bulging alveolar ridge on the inner side of the body of the bone. If the knife is entered three-quarters of an inch behind and below the last molar tooth and carried down to the bone, the nerve will be divided. Hilton divided it opposite the second molar tooth, where it is covered only by the mucous membrane, and Lucas pulls the tongue forward and over to the opposite side, when the nerve can be seen standing out as a firm cord under the mucous mem- brane by the side of the tongue and can be easily seized with a sharp hook and divided or a portion excised. This is a simple enough operation on the cadaver, but when the disease is extensive and has extended to the floor of the mouth, as is generally the case when division of the nerve is thought of, the operation is not practicable. THE SIXTH OR ABDUCENT NERVE (N. ABDUCENS) (Fig. 738). The sixth or abducent nerve supplies the External rectus muscle. Its super- ficial origin is by several filaments from the postpontile groove, between pons and pyramid. Its deep origin is from the upper part of the floor of the fourth ventricle, close to the median line, beneath the eminentia abducentis (Fig. 650). From the nucleus of the abducent nerve some fibres are supposed to pass through the medial longitudinal bundle to the oculomotor nucleus of the opposite side and into the oculomotor nerve, along which they are carried to

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