Submandibular trigonum
A region of the lateral neck is referred to in anatomy as the Trigonum submandibulare (Latin for "triangle under the lower jaw") or lower jaw triangle . It belongs to the anterior cervical region . The upper boundaries of this region are the lower jaw and in front and behind the two bellies of the digastric muscle . At the rear, this region merges into the retromandibular fossa (“pit behind the lower jaw”). The lower jaw triangle is delimited from the central child triangle ( Trigonum submentale ) by the anterior belly of the digastric muscle.
The largest structure in this triangle is the submandibular gland (mandibular salivary gland ). The delimitation of the region from the sublingual region ( regio sublingualis ) is essentially formed by the mylohyoideus muscle , which thus mainly forms the diaphragm oris (Greek / Latin: "partition of the mouth"). Through the submandibular trigonum, the facial artery runs upwards over the edge of the lower jaw into the cheek region; its pulse can be felt in the middle of the lower jaw. The nervus lingualis , the mylohyoid nerve (a branch of the inferior alveolar nerve ) and the hypoglossal nerve can be found in this region .
literature
- TH Schiebler: Anatomy: Histology, history of development, macroscopic and microscopic anatomy, topography . Springer-Verlag, 9th edition 2006, ISBN 978-3-5402-6525-2 , p. 445.