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A D V E R T I S E M E N T
A D V E R T I S E M E N T
The base of the submandibular triangle consists of the flat mylohyoid and hyoglossus muscles framed by the stylohyoid muscle and the bellies of the digastric muscle. The lingual branch of the trigeminal nerve (V) and the hypoglossal nerve (XII) pass anterior between the two deep flat muscles. The submandibular ganglion lies below the lingual nerve. The facial branch of the external carotid artery passes deep to the stylohyoid muscle and posterior belly of the digastric, crosses the submandibular triangle and crosses the inferior margin of the mandible. The marginal mandibular branch of the facial nerve (VII) lies a variable distance below the margin of the mandible and is superficial to the facial vessels.
A D V E R T I S E M E N T
The submandibular salivary gland folds around the posterior margin of the mylohyoid muscle (cut away). The deep lobe and submandibular (Wharton's) duct lie beneath the muscle. The duct passes beneath the sublingual salivary gland to reach the sublingual caruncle in the anterior floor of the mouth. The junction of the two lobes is connected to the submandibular ganglion above. The facial artery runs deep to the bulk of the gland, often embedded in the gland substance.
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A D V E R T I S E M E N T
The superficial lobe of the submandibular gland fills the submandibular triangle and overlaps the bellies of the digastric muscle. Lymph nodes normally present in the triangle are not depicted. The gland is surrounded by a pseudocapsule of loose areolar fascia.
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This page was last modified on 1/14/1999.
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