Spinal Nerves Part 3 Flashcards
Which superficial branch of the cervical plexus carries fibers from C2 and C3 and divides into anterior/posterior branches after entering the parotid gland?
great auricular nerve
What CN does the anterior branch of the great auricular nerve combine with to supply the skin over the parotid gland?
Facial nerve
What does the posterior branch of the great auricular nerve supply?
skin over the mastoid process
What superficial branch of the cervical plexus carries fibers from C2 and C3 and divides into ascending/descending branches which both supply the platysma muscle?
Transverse cutaneous nerve
What nerves arise from the trunk formed by the trunks from C3 and C4?
medial, intermediate, and lateral supraclavicular nerves
What is supplied by the medial supraclavicular nerve?
the skin inferior to the sternal end of the clavicle, as far inferior as the second rib
What is supplied by the intermediate supraclavicular nerve?
the skin over the deltoid and pectoralis major, as far inferior as the second rib
What is supplied by the lateral supraclavicular nerve?
the skin over the superior and lateral aspects of the shoulder
What are the deep branches of the cervical plexus divided into?
a medial series and a lateral series
Which series of the deep branches of the cervical plexus passes into the posterior triangle?
lateral series
Which series of the deep branches of the cervical plexus consists of a number of communicating and muscular branches?
Bothe the medial and lateral series
Which CN may receive some communicating branches carrying fibers from C2-C4?
spinal accessory nerve
What 4 muscles are associated with the muscular branches of the lateral series of the deep branches of the cerivcal plexus?
SCM, Trapezius, Levator scapula and Middle scalene
Which muscle supplied by the lateral series of the deep branches of the cervical plexus receives proprioceptive and sensory fibers from C2-C4?
SCM
What kind of fibers does the the trapezius receive from C2 (and perhaps C3)?
proprioception fibers
What kind of innervation does the levator scapula receive fromm C3 and C4?
motor and sensory
Where do the middle scalenes receive fibers from?
C3 and C4
Which series of the deep branches of the cervical plexus passes into the anterior triangle?
media series
T/F: the medial series has communicating branches between the vagus and the loop between C1 and C2.
True
What are the communicating branches of the medial series between the superior cervical ganglion to the upper four cervical nerves?
3 or 4 gray rami communicans
T/F: fibers from C2 communicate with the hypoglossal nerve then separate to form the superior root of the ansa cervicalis.
False; this is true of the fibers from C1
Where are muscular branches of the medial series sent?
rectus capitis lateralis (C1), rectus capitis anterior (C1, C2), longus capitis (C1-C3), and longus colli (C2-C4)
What do branches of C2 and C3 combine to form?
the inferior root of the ansa cervicalis
What does the ansa cervicalis supply?
sternohyoid, sternothyroid, and both bellies of the omohyoid
What levels form the phrenic nerve and which level contributes the most fibers?
C3, C4, and C5 with C4 contributing the most fibers
T/F: the phrenic nerve descends trhough the neck, posterior to the anterior scalene muscle.
False; should say anterior to the anterior scalen muscle
Where does the phrenic nerve receive postganglionic sympathetic fibers from?
all 3 cervical ganglia
What does the phrenic nerve supply?
the diaphragm
What typically results when a subluxation impinges or irritates the phrenic nerve?
hiccups
