Lecture5: Posterior Triangle Of The Neck Flashcards
What is the Origin of the sternomastoid?
Sternum and clavicle
Where does the sternomastoid attach to at the skull?
The mastoid process
What is the sternomastoid’s nerve supply?
Spinal accessory nerve XI
What is Torticollis and what does it lead to?
It’s a sternomastoid spasm, leads to abnormal head posture
Which pulse palpates along the sternomastoid?
Carotid pulse
Which border of the sternomastoid does the carotid pulse palpate?
Anterior
Where does the Platysma muscle lay?
In the superficial cervical fascia
Where does the Platysma muscle obtain it’s innervation?
Facial nerve
Which layer of the deep cervical fascia surrounds all the neck structures?
Investing Layer
Where does the investing layer divide? (Between which 2 muscles?)
Trapezius and sternomastoid
What does the pretracheal layer surround?
The thyroid gland and infrahyoid muscles
What does the prevertebral layer surround?
The vertebral column and associated muscles
What does the carotid sheath surround?
The neurovascular bundle of the neck
What is the base of the posterior triangle?
Clavicle (middle 1/3)
What is the apex of the posterior triangle?
The occipital bone
What is the posterior border of the posterior triangle?
Trapezius
What surrounds the posterior triangle anteriorly?
Sternomastoid
What are the nerves of the posterior triangle?
Spinal accessory nerve, and branches of the brachial plexus nerve and trunks of it
What are the vessels of the posterior triangle?
External jugular vein, and subclavian artery and vein
