(C1-C4), sensory nerves, pass under the sternocleidomastoid "lets get things started"
Lesser occipital nerve
runs to occiput
Great auricular nerve
runs up to ear
Transverse cervical nerve
goes across neck
runs inferiorly to the clavicle
Deep posterior triangle branches of the thyrocervical trunk: "I tried teaching crazy sex" = inferior thyroid, transverse cervical, suprascapular arteries
Superior thyroid artery
comes off external carotid, inferior thyroid artery comes off thyrocervical trunk(from subclavian)
(2) Anterior Triangle
anterior to the sternoceidomastoid, lateral to the midline of neck
inferior to superior omohyoid, laryngeal prominence in center and strap muscles on sides
attach to hyoid bone,
bodies inferior to hyoid, sternohyoid, sternothyroid, thyrohyoid, and omohyoid all innervated by ansa cervicalis (C1, C2, and C3) except thyrohyoid which gets C1
bodies superior to hyoid
(2 bellies, anterior (ABD) and posterior (PBD)) innervated by CN VII (PBD) and CN V (ABD)
travels with posterior digastric, innervated by CN VII (pierces through the posterior digastric)
forms the floor of the oral cavity, innervated by CN V
lies deep to mylohyoid, innervated by a direct branch of C1
and hypoglossus both insert into tongue, innervated by CN XII
contains Carotid Sheath, a tubular structure containing the internal jugular vein, vagus nerve (CN X), and either the common carotid or internal carotid artery. The internal carotid provides no branches to the neck. Sympathetic trunk lies deep to carotid sheath.
between the anterior Digastric and the mandible. Contains submandibular gland.
a paired, U shaped salivary gland, wrapped around the myohyoid muscle.
unpaired; bounded inferiorly by hyoid bone and laterally by right and left anterior bellies of the Digastric muscles. Contains lymph nodes and little veins that join to form the Anterior Jugular vein
other than the Vagus, nerves of the anterior triangle are derived from ventral primary rami of cervical spine, cranial nerves, or cervical levels of the sympathetic trunk
(V3, mandibular branch of Trigeminal) has a branch for the ABD and mylohyoid..
CN VII facial
innervates the stylohyoid and PBD as it leaves the skull, innervates Platysma a little later.
CN X Vagus
gives rise to superior laryngeal nerve and recurrent laryngeal nerves while in the sheath.
CN XI spinal accessory
innervates the trapezius and Sternocleidomastoid.
CN XII hypoglossal
motor to intrinsic musculature of the tongue and all extrinsic tongue muscles except the palatoglossus. The Ansa Cervicalis of the cervical plexus appears to "hang from" CN XII.
"C3, 4, and 5, keeps the diaphragm alive", travel down on the anterior scalene muscle
Cervical sympathetic trunk
lies deep to the carotid sheath, on the anterior surface of the prevertebral fascia.
Consists mainly of ascending preganglionic sympathetic axons which originate from T1-T4.