Cervical and Brachial Plexuses
great auricular nerve
Y-shaped nerve on the side of the neck the runs on either side of the ear
medial cord of brachial plexus
junction that lies on the length of the lower trunk
lateral cord of brachial plexus
junction that lies on the length of the upper trunk
ulnar nerve
left side of the M, near the body
phrenic nerve
long nerve that runs from the clavicle to the inside wall of the ribcage, looks like suspenders
median nerve
long nerve that sits in the middle of the M, between ulnar and musculocutaneous nerves (9)
posterior divisions of brachial plexus
lower section of the probe when placed under the lateral and medial cords
lower subscapular nerve
lowest nerve of the three along the medial (near body) side of the posterior cord
posterior cord of brachial plexus
middle junction that lies on the length of the middle trunk
thoracodorsal nerve
middle nerve of the three along the medial (near body) side of the posterior cord
medial cutaneous nerves
nerves that stem from above the ulnar nerve on the medial side near the body, cut (15 and 16)
BQ: what is the function of the great auricular nerve?
provides sensory to external ear and skin in front of it
BQ: what is the function of the supraclavicular nerves?
provides sensory to the top of the shoulder
musculocutaneous nerve
right side of the M, near the arm
long thoracic nerve of brachial plexus
runs above C-8 and T-1 and then dips underneath
lateral pectoral nerve
skinny attachment before the M starts on the lateral side near the outside of the arm
BQ: what is the function of the musculocutaneous nerve?
supplies biceps brachii, brachialis, and coracobrachialis
lateral root of median nerve
the left cord of the V within the center of the M-shape, near the outside of the arm
medial root of median nerve
the right cord of the V within the center of the M-shape, near the inside of the arm
anterior divisions of brachial plexus
the top section of the probe when placed under the lateral and medial cords
BQ: what does the radial nerve supply?
the triceps brachii
BQ: what nerve is the funny bone?
the ulnar nerve
radial nerve
thicker nerve on the posterior cord that splits from the axillary nerve and lies on the medial side near the body (11)
axillary nerve
thinner nerve on the posterior cord on the opposite side of the three nerves on the medial side, lies near the outside of the arm
upper trunk of brachial plexus
union where C-5 and C-6 meet
lower trunk of brachial plexus
union where C-8 and T-1 meet
middle trunk of brachial plexus
union, extension of root C-7
upper subscapular nerve
uppermost nerve of the three along the medial (near body) side of the posterior cord
supraclavicular nerves
upside down Y-shape on neck and shoulder area, thicker and deeper than the great auricular nerve
suprascapular nerve of brachial plexus
where upper trunk attaches to upper arm
roots of brachial plexus
C-5 is top most/most lateral C-6 is under C-5 C-7 is under C-6 C-8 is under C-7 T-1 is the lowest/most medial
