Triangles of Neck (TMA) Flashcards
What are the borders of anterior triangle of the neck?
- inferior mandible
- anterior sternocleidomastoid
- Sagittal line down midline of neck
What covers the roof of the anterior triangle of the neck?
Investing fascia
What covers the floor of the of the anterior triangle of the neck?
Visceral fascia
Name the 4 suprahyoid muscles
Stylohyoid
Mylohyoid
Geniohyoid
Digastric
[S]uck [M]y [G]rand [D]ick
Name the 4 infrahyoid muscles
Thyrohyoid
Omohyoid
Sternohyoid
Sternothyroid
What does the common carotid artery bifurcate to (in the anterior triangle of the neck)
External and internal carotid branches
Where can the internal jugular vein be found?
In the anterior triangle of the neck
Which cranial nerves pass through the anterior triangle of the neck
Facial [VII] 7 Glossopharyngeal [IX] 9 Vagus [X] 10 Accessory [XI] 11 Hypoglossal [XII] 12
Name the 4 subdivisions of the anterior triangle
Carotid triangle
Submental triangle
Submandibular triangle
Muscular triangle
Borders of the carotid triangle
Superior - posterior Belly of digastric
Lateral - medial sternocleidomastoid
Inferior - superior Belly of omohyoid
Main structures of carotid triangle
- Common carotid artery bifurcate to ext. and int. carotid artery
- Internal jugular vein
- Hypoglossal (CN:12) and vagus nerve (CN:10)
- BONUS*
- dilated portion of common carotid/internal carotid = BARORECEPTORS = detect stretch as measure of blood pressure
- CN:12 feeds this info to brain
Superior border of carotid triangle
Posterior Belly of digastric
Lateral border of carotid triangle
Medial sternocleidomastoid
Inferior border of carotid triangle
Superior belly of omohyoid muscle
Borders of the submental triangle
Inferior - hyoid
Medial - midline of neck
Lateral - anterior belly of digastric
Inferior border of submental triangle
Hyoid
Medial border of submental triangle
Midline of neck
Lateral border of submental triangle
Anterior belly of digastric muscle
What forms the base of the submental triangle
Mylohgyoid muscle
From mandible to hyoid
What are the main structure in the submental triangle
Submental lymph nodes.
To drain lymph from floor of the mouth and tongue
Borders of the submandibular triangle
Superior - body of mandible
Anterior - anterior belly of digastric
Posterior - posterior belly of digastric
Superior border of submandibular triangle
Body of mandible
Anterior border of submandibular triangle
Anterior belly of digastric
Posterior border of submandibular triangle
Posterior belly of digastric muscle
What main structures does the submandibular triangle contain
- submandibular gland (salivary)
- Lymph nodes
- Facial artery
What are the borders of the muscular triangle
Superior - hyoid
Medial - midline of neck
Supero-laterally - superior belly of omohyoid
Infero-laterally - inferior part of sternocleidomastoid
Superior border of muscular triangle
Hyoid
Medial border of muscular triangle
Midline of neck
Supero-lateral border of muscular triangle
Superior belly of omohyoid muscle
Infero-lateral border of the muscular triangle
Inferior part of sternocleidomastoid
What are the main structures in the muscular triangle
- infrahyoid muscles
- pharynx
- thyroid
- parathyroid
