Superficial Triangles and Cervical Viscera Flashcards
The 3 important landmarks of the neck
C6 (sixth cervical vertebra)
greater horn of the hyoid bone (greater cornu)
anterior scalene muscle
important structure in suboccipital triangle
vertebral artery
vertebral artery enters the transverse process of what vertebra
C6
Phrenic N roots
C3, C4, C5
hangman’s fracture risks damaging
phrenic nerve
hangman fracture = fracture of C2
________N runs on the anterior surface of what muscle
Phrenic N, anterior scalene.
Lateral Neck Layer 1 contents
platysma m.
external jugular vein
Lateral Neck Layer 2 contains
SCM
CN XI
3 structures you want to preserve in a Radical Nec dissection
SCM
IJV
CN XI
SCM innervated by
CN XI
Posterior triangle borders
SCM
Trapezius
middle 1/3 of clavicle
EJV is formed by the conjunction of what veins
posterior auricular v
retromandibular v
Spinal Accessory N
CN XI
innervates SCM and Trapezius
enters triangle slightly above midpoint of SCM
contributions from C2-C3 (SCM) C3-C4 (trapezius)
2 places we care about branchial fistulas and cysts being distributed
along SCM
along midline - development of thyroid, thyroglossal duct cyst
What does the IJV drain
the brain
Contents of the Root of the Neck
Carotid Sheath (IJV, common carotid, vagus N) subclavian v phrenic n anterior scalene subclavian a brachial plexus
contents of the carotid sheath
common carotid a
IJV
vagus n.
Structures of the lateral root of the neck
suprascapular artery and subclavian vein
transverse cervical artery
suprascapular artery
Structures in the mid portion of the root of the neck
centered on the anterior scalene and its relationships with subclavian v transverse cervical a suprascapular a subclavian a brachial plexus
Root of the neck medial to anterior scalene
carotid sheath, thoracic duct, costocervical trunk, inf thyroid artery, ascending cervical a, recurrent laryngeal n, sympathetic chain, vertebral a and ganglion
structures that run anterior to anterior scalene m (2)
subclavian v
phrenic n.
Structures that run posterior to anterior scalene m
subclavian a
brachial plexus
How do you tell the difference between external carotid and internal carotid
external has branches in the neck
first branch is superior thyroid.
Anterior triangle of then neck contains what triangles (4)
muscular triangle
carotid triangle
submandibular triangle
submental triangle