Anatomy of the neck Flashcards
What level is the hyoid bone
C3
What is fascia
Membranous connective tissue
Where is the sheath located
Posterior to the sternocleidomastoid
Which infra hyoid muscles are innervated by the Sansa cervicalis
Both bellies of omohyoid, stylohyoid, sternothyoid
What are the infra hyoid muscles
Found below hyoid bone
Superior belly of Omohyoid Inferior belly of Omohyoid Sternohyoid Sternothyoid Thyrohyoid
What are the supra hyoid muscles
Found above hyoid bone
Anterior belly of digastric Posterior belly of digastric Mylohyoid Geniohyoid Stylohyoid
What are the 4 anterior triangles of the neck
Carotid
Submental
Submandibular
Muscular
What is the posterior triangle of the neck
Posterior triangle
- split into two by the inferior belly of the omohyoid muscle: occipital and subclavian
Where is investing
The roof of the neck
Where is the visceral fascia
The floor of the neck
What happens with the common carotid
Bifurcates within the anterior triangle into the internal and external carotid branches
Boundaries of the carotid triangle
Superior: Posterior belly of digastric
Inferior: Superior belly of omohyoid
Lateral: Medial border of sternocleidomastoid
Roof: Skin, superficial and platysma
Floor: Thyrohyoid muscle, hyoglossus and constrictor muscles of the pharynx
Contents of the carotid triangle
Common carotid artery - bifurcates, internal jugular veins and hypoglossal and vagus nerves
Boundaries of the submental triangle
Inferior: Hyoid bone
Medially: Midline of neck
Laterally: Anterior belly of digastric
Contents of the submental triangle
Submental lymph nodes
Floor is formed from the mylohyoid muscle
Boundaries of submandibular triangle
Superior: Body of the mandible
Anterior: Anterior belly of digastric
Posterior: Posterior belly of digastric
Contents of submandibular triangle
Submandibular lymph nodes, internal and external carotid arteries and hypoglossal nerve, facial artery and vein pass through here
Boundaries of the muscular triangle
Superior: Hyoid bone
Medial: Midline of the neck
Supero - laterally: Superior belly of omohyoid
Infero - laterally: Inferior portion of sternocleidomastoid
Contents of muscular triangle
Infra hyoid muscle, pharynx and the thyroid and parathyroid glands
Posterior triangle of the neck
Posterior triangle, split into two by the inferior belly of omohyoid
Boundaries of the posterior triangle
Anterior: Posterior border of sternocleidomastoid
Posterior: Anterior border of trapezius
Inferior: Middle 1/3 of the clavicle
Contents of the posterior triangle
External jugular vein, pierces through investing fascia and empties into the subclavian vein
