الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The brachial plexus is a somatic nerve plexus, most commonly originates from
the anterior divisions (ventral rami) of the lower four cervical spinal nerves (C5- C8) and
the first thoracic spinal nerve (T1). The major role of the brachial plexus is to provide
nerve supply to the upper extremity, but also it has sensory and motor branches to the
upper thoracic wall and some cervical structures. (10) As the nerve roots exit the cervical
and thoracic foramina they unite and branch in a well described pattern in the following
order: roots, trunks, divisions, cords, terminal branches and peripheral nerves.