Triangles of the neck Flashcards
What are the two main triangles of the neck?
Anterior triangle
Posterior triangle
What are the borders of the anterior triangle of the neck?
Superior
Medial
Lateral
Roof
What is the superior border of the anterior triangle of the neck?
Inferior border of mandible
What is the medial border of the anterior triangle of the neck?
Imaginary line down middle of neck
What is the lateral border of the anterior triangle of the neck?
Medial border of sternocleidomastoid
What is the roof of the anterior triangle of the neck?
Investing layer of deep cervical fascia
What are the contents of the anterior triangle of the neck?
Supra-hyoid muscles
Infra-hyoid muscles
Carotid sheath
What do the structures contained in the anterior triangle of the neck travel between?
The head
and the thorax
What can the anterior triangle of the neck be narrowed down into?
Carotid triangle
What are the borders of the carotid triangle?
Lateral
Superior
Inferior
What forms the lateral border of the carotid triangle?
Medial border of sternocleidomastoid
What forms the superior border of the carotid triangle?
Anterior belly of digastric
What forms the inferior border of the carotid triangle?
Superior belly of omohyoid
What does the carotid traingle contain?
Carotid sheath
What does the common carotid artery do in the carotid triangle?
Bifurcates into internal and external carotid arteries
What are the borders of the posterior triangle of the neck?
Medial
Lateral
Inferior
What is the medial border of the posterior triangle of the neck?
Lateral border of sternocleidomastoid
What is the lateral border of the posterior triangle of the neck?
Medial border of trapezius
What is the inferior border of the posterior traingle oft the neck?
Middle third of clavicle
What are the contents of the posterior triangle of the neck?
Inferior belly of omohyoid Anterior scalene Middle scalene Posterior scalene Levator scapulae
Subclavian artery
Subclavian vein
External jugular vein
Brachial plexus trunks
Accessoy nerve
Phrenic nerve
How does the inferior belly of omohyoid pass through the posterior triangle of the neck?
Travels in an infero-lateral direction
Where is the subclavian artery located in the posterior triangle of the neck?
Between the anterior and middle scalene muscles
When does the external jugular vein enter the posterior triangle?
After it has passed over sternocleidomastoid
How does the external jugular vein enter the posterior triangle?
Pierces investing layer of fascia
to drain into subclavian vein
Where are the roots of the brachial plexus located in the posterior triangle of the neck?
Between the anterior and middle scalene muscles
Where is the phrenic nerve located in the posterior triangle of the neck?
Superficial to the anterior scalene muscle
What do the structures contained in the posterior triangle of the neck travel between?
Neck/thorax
and upper limb
