What is the only triangle that isn’t bilaterally paired?
Submental
What are the contents of the carotid triangle?
Internal jugular vein, carotid artery, vagus nerve
Sternocleidomastoid
O: mastoid process of temporal bone
I: sternal head - anterior surface of manubrium of sternum
Clavicular head - superior surface of medial third of clavicle
N: spinal accessory nerve
A: unilateral - tilts head to same side bilateral - extends/flexes neck
Platysma
O: inferior border of mandible
I: fascia covering superior parts of pec major and deltoid
N: cervical branch of facial nerve
A: draws corners of mouth inferiorly and widens it as in expressions of sadness and fright
Trapezius
O: nuchal line, external occipital protuberance, nuchal ligament, spinous processes
I: clavicle, acromion, spine of scapula
N: spinal accessory
A: elevates, retracts, and rotates scapulae superiorly
3 layers of deep cervical fascia
- investing
- pretracheal
- prevertebral
Cervicodorsal trunk
Branch of the thyrocervical trunk
- bifurcates into superficial cervical artery & dorsal scapular artery
Suprascapular artery
Branch of the thyrocervical trunk
External jugular vein
Terminates in the subclavian vein
Subclavian vein
United w/ internal jugular vein to form brachiocephalic vein
External jugular vein terminates
In the subclavian vein
Subclavian vein unites with ? To form ?
United with internal jugular vein
Form brachiocephalic vein
Carotid sinus
Baroreceptor that reacts to changes in arterial BP
Cervicodorsal trunk
Branch of the thyrocervical trunk
- bifurcates into superficial cervical artery & dorsal scapular artery
Suprascapular artery
Branch of the thyrocervical trunk
External jugular vein
Terminates in the subclavian vein
Subclavian vein
United w/ internal jugular vein to form brachiocephalic vein
External jugular vein terminates
In the subclavian vein
Subclavian vein unites with ? To form ?
United with internal jugular vein
Form brachiocephalic vein
Carotid sinus
Baroreceptor that reacts to changes in arterial BP