[15] The posterior rami provide spine muscle and trunk skin sensation. The most complex nerve plexus is the brachial plexus, consisting of cervical nerves 5 through 8 (C5 to C8) and thoracic nerve ...

An increased risk of lymph contamination exists at this sampling site 3. Anatomy. The brachial vein is a plexus of vessels at the ventromedial (flexor) surface of the radiohumeral joint (elbow ...