Flashcards in Quiz 4: Cervical Plexus Deck (63)
The cervical plexus is formed by the anterior primary rami of ____ through ____ spinal nerves.
T/F: The nerve roots of the cervical plexus form a series of communicating loops.
Fibers from what communicate with the loop formed by C1 and C2?
Inferior Vagal Ganglion
Fibers from the spinal accessory nerve carry ____________ information.
Fibers from the spinal accessory nerve communicate with the loop formed by what?
C2 & C3 with C3 & C4
Fibers from sternocleidomastoid travel to _____.
Fibers from Trapezius travel to ______.
C3 & C4.
The hypoglossal nerve communicates with C1 fibers that will later separate from the hypoglossal nerve to become what?
Superior root of the ansa cervicalis
C1 fibers from the hypoglossal nerve supply what muscles?
Thyrohyoid & Geniohyoid
Usually three gray rami communicans carry ___________ __________ fibers to the loop between C1 & C2 and roots of C3 & C4.
What type of postganglionic sympathetic fibers, specifically, are carried in the gray rami communicans?
Vasomotor, Sudomotor and Pilomotor
What does vasomotor supply?
Muscular lining in blood vessels
What does sudomotor supply?
What does pilomotor supply?
What does the lesser occipital nerve supply?
-Skin on superior 1/3 of auricle
-Skin behind the ear
The Lesser Occipital Nerve carries fibers from what level(s)?
C2 (and occasionally C3)
Why is the lesser occipital nerve clinically significant?
May be implicated in cases of cervicogenic headache. Adjusting C1/C2 and occiput can help.
The Great Auricular Nerve carries fibers from what level?
C2 & C3
Where does the Great Auricular Nerve enter?
The parotid gland
What does the Great Auricular Nerve divide into?
Anterior and Posterior Branches
The anterior branch of the Great Auricular Nerve combines with what nerve?
Facial Nerve VII
What does the anterior branch of the Great Auricular Nerve (& CN VII) supply?
The skin over the parotid gland
What does the posterior branch of the Great Auricular Nerve supply?
Skin over the mastoid process.
Where does the Transverse Cutaneous Nerve of the neck carry fibers from?
C2 & C3
What two branches does the Transverse Cutaneous Nerve of the neck divide into?
What do the ascending and descending branches of the Transverse Cutaneous Nerve of the neck supply?
Skin over the platysma muscle
The trunks from C3 & C4 combine to form a trunk that gives rise to what?
Medial, Intermediate and Lateral Supraclavicular Nerves
What does the Medial Supraclavicular Nerve supply?
Skin inferior to the sternal end of the clavicle, as far inferior as the second rib.
What does the Intermediate Supraclavicular Nerve supply?
Skin over the deltoid and pectoralis major, as far inferior as the second rib.