Anterior Triangle of the Neck
What is the Carotid Sinus and Body?
Carotid Sinus: Dilation of the proximal part of teh internal carotid. Primarily a baroreceptor. Innervated by glossopharyngeal and vagus nerves. Stimulated by changes in BP. Carotid Body: Oval mass on the medial side of the common carotid befurcation. Primarily a chemoreceptor. Innervated by Glossopharyngeal and vagus nerves. Stimulated by low levels of Oxygen
What are the contents of the Carotid Triangle?
Common Carotid artery ascends into this triangle and splits into internal and external carotids at the superior margin of the thyroid cartilage. Carotid Sinus and Carotid Body
What are the boundaries of the Submental Triangle?
Inferior - Hyoid Bone Lateral - Right and Left anterior bellies of Digastic Muscle Floor - Mylohyoid muscles Apex - Mandibula Symphysis
What is the Superior boundary of the Anterior Triangle?
Inferior Border of the Mandible
What are the boundaries of the Submandibular Triangle?
Inferior border of the Mandible and anterior and posterior bellies of the digastric muscles Floor is mylohyoid and hyoglossus muscles and the pharyngeal constrictor
What are the contents of the MuscularTriangle?
Infrahyoid muscles, thyroid and paraphyroid glands
What is the Apex of the Anterior Triangle?
Jugular notch of the manibrium
What is the Anterior boundary of the Anterior Triangle?
Midline of the neck
What is the Floor of the Anterior Triangle?
Pharynx, Larynx, and Thyroid gland
What is the Posterior boundary of the Anterior Triangle?
SCM
What is the Roof of the Anterior Triangle?
Subcutaneious tissues and platysma
What are the contents of the Submandibular Triangle?
Submandibular gland, lymph nodes, hypoglossal nerve, nerve to mylohyoid, and parts of facial artery and vein
What are the four triangles inside the Anterior Triangle?
Submental Submandibular Muscular Carotid
What are the contents of the Submental Triangle?
Submental Lymph Node and veins
What are the boundaries of the Carotid Triangle?
Superior - Posterior belly of the digastric. Inferior - Superior Belly of Omohyoid Posterior - Anterior Margin of SCM
What are the boundaries of the Muscular Triangle?
Superior - Superior belly of the Omohyoid Posterior - Anterior margin of SCM Anterior - Medial plane of neck
Where is the Submental Triangle?
Unpaired triangle inferior to the chin.
