SPINAL NERVES. 638 upper limb. The nerves which form the plexus are all smaller in size, and their mode of communication is the following. The fifth and sixth nerves unite near their exit from the spine into a common trunk ; the seventh nerve joins this trunk near the outer border of the Middle… … The brachial plexus communi- cates with the cervical plexus by a branch from the fourth to the fifth nerve, and with the phrenic nerve by a branch from the fifth cervical, which joins that nerve on the Anterior Scalenus muscle. The cervical and first dorsal nerves are also joined by filaments from…
Human anatomy
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