cervical plexus Flashcards
what do fibers from the inferior vagal ganglion communicate with?
the loop formed by C1 and C2
what forms the cervical plexus?
anterior rami of C1-C4 spinal nerves
what type of information is carried by spinal accessory nerve?
proprioceptive information
the spinal accessory nerve communicates with a loop formed by what nerves?
loop form C2 to C3 and a loop form C3 to C4
the sternocleidomastoid goes to which cervical nerves
C2
the trapezius goes to what cervical nerve
C3 and C4
which cervical nerve communicates with the hypoglossal nerve
C1 and C2
the superior root of the ansa cervicalis comes where?
the C1 and C2 nerves once they separate from the hypoglossal nerve
What do C1 fibers that remain with the hypoglossal nerve supply?
thyrohyoid and geniohyoid
what is carried by the three rami communicans of the superior cervical ganglion?
postganglionic sympathetic fibers (vasomotor, sudomotor, and pilomotor) to the loop between C1 and C2 and roots of C3 and C4
what supplies skin on the superior 1/3 of the auricle as well as the skin behind the ear?
the lesser occipital nerve carries fibers from C2 and occasionally C3
what nerves communicate with the greater occipital nerve and the great auricular nerve
the lesser occipital nerve
the lesser occipital nerve may be implicated in cases of what?
cervicogenic headache
what nerve enters the parotid gland and divides into anterior and posterior branches.
great auricular nerve carries fibers C2 and C3
the anterior branch of the great auricular nerve combine with the facial nerve supply what
skin over the parotid gland
the posterior branch of the great auricular nerve supplies what?
skin over the mastoid process
the skin over the platysma muscle is supplied by what nerve?
transverse cutaneous nerve of the neck with fibers from C2 and C3, which divide into ascending and descending branches
C3 and C4 trunks combine to form what nerve?
the medial, intermediate, and lateral supraclavicular nerves
what area is supplied by the medial supraclavicular nerve
skin inferior to the sternal end of the clavicle, as far as the second rib
what area is supplied by the intermediate supraclavicular nerve?
skin over the anterior deltoid and pectoralis major, as far as the second rib
what area is supplied by the lateral supraclavicular nerve
skin over the superior and lateral aspect of the shoulder
the deep branches of the cervical plexus is divided into what series
medial and lateral series
The lateral series passes into the posterior triangle and consists of what type of branches?
communicating and muscular branches
the spinal accessory nerve receives information from where?
communicating branches carrying fibers from C2-4
What are the muscular branches of the lateral series?
Sternocleidomastoid-proprioception from C2-4
Trapezius - proprioception from C2, perhaps C3
Levator scapula - innervated by C3-4, motor +sensory
Middle scalene - C3,C4
Where does the medial series pass into?
the anterior triangle
what are the communicating branches of the medial series?
- between the vagus and loop between C1 and C2
- 3 or 4 gray rami communicans from the superior cervical ganglion
- fibers from C1 communicating with the hypoglossal nerve
What are the muscular branches of the medial series?
- rectus capitis lateralis; C1
- rectus capitis anterior; C1, C2
- longus capitis C1-C3
- longus colli; C2-C4
what makes up the inferior branch of the ansa cervicalis?
fibers from C2 and C3
what is supplied by the ansa cervicalis?
sternohyoid, sternothyroid, both bellies of the omohyoid
what makes up the Phernic nerve?
C3, C4, C5 with C4 contributing the most
what is the path of the phernic nerve?
through the neck, anterior to the anterior scalene muscles
What type of information is carried by the phernic nerve?
postganglionic sympathetic fibers from the cervical ganglia
