ShoulderandAxilla
6
Plate416
BrachialPlexus:Schema
Medial pectoral nerve (C8, T1)
Medial brachial cutaneous nerve (T1)
Medial antebrachial cutaneous nerve
(C8, T1)
Upper subscapular nerve (C5, 6)
Thoracodorsal (middle subscapular) nerve (
C6
, 7,
8)
Lower subscapular nerve (C5, 6)
Inconstant contribution
Inconstant contribution
Musculocutaneous
nerve (C5, 6, 7)
Axillary
nerve (C5, 6)
Radial nerve
(C5, 6, 7,
8,
T1
)
Median nerve
(
C5
, 6, 7,
8, T1)
Ulnar nerve
(
C7
, 8, T1)
Contribution
from C4
(prefixed)
Dorsal
ramus
Contribution
from T2
(postfixed)
To longus colli
and scalene
muscles
(C5, 6, 7,
8)
1st intercostal nerve
Long thoracic
nerve (C5, 6, 7)
Suprascapular
nerve (C5, 6)
To subclavius
nerve (C5, 6)
Lateral pectoral
nerve (C5, 6, 7)
Terminal
branches
3 cords
3 anterior divisions
3 posterior divisions
3 trunks
5 roots
(ventral rami of
spinal nerves)
Dorsal scapular
nerve (C5)
To phrenic
nerve
Note: Usual composition shown.
Prefixed plexus has large C4
contribution but lacks T1.
Postfixed plexus lacks C5 but
has T2 contribution.
1st rib
Superior
Middle
Inferior
Lateral
Posterior
Medial
C5
C6
C7
C8
T1
See±also±
Plates 410, 460, 461
±
