Respuesta :
The anterior rami (sometimes called roots) of the brachial plexus are simply the continuations of the anterior rami of spinal nerves.
What is Brachial Plexus?
The lower four cervical nerves' anterior rami and the first thoracic nerve come together to form the brachial plexus, a network of nerves (C5, C6, C7, C8, and T1). This plexus travels from the spinal cord, across the first rib, through the armpit, and into the cervico axillary canal in the neck. It supplies the chest, shoulder, arm, forearm, and hand with afferent and efferent nerve fibers.
Five roots, three trunks, six divisions (three anterior and three posterior), three cords, and five branches make up the brachial plexus. The plexus is divided into five "terminal" branches and countless other "pre-terminal" or "collateral" branches, including the subscapular nerve, thoracodorsal nerve, and long thoracic nerve.
In cadaver dissections, the M or W shape formed by the musculocutaneous nerve, lateral cord, median nerve, medial cord, and ulnar nerve is frequently used to identify a portion of the brachial plexus.
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