GROSS ANATOMY
BRACHIAL PLEXUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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C5
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C6
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C7
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C8
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T1
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Detailed explanation-1: -The brachial plexus is formed by the anterior primary rami of C5 through T1 and provides sensory and motor innervation of the upper extremity.
Detailed explanation-2: -The brachial plexus (plexus brachialis) is a somatic nerve plexus formed by intercommunications among the ventral rami (roots) of the lower 4 cervical nerves (C5-C8) and the first thoracic nerve (T1).
Detailed explanation-3: -Ventral rami of the C5 through T1 spinal nerves constitute the roots of the brachial plexus. They come together to give rise to three trunks: superior (C5-C6), middle (C7), and inferior (C8-T1). These trunks subsequently divide into six divisions, located anteriorly and posteriorly.
Detailed explanation-4: -The ulnar nerve is a terminal branch of the medial cord of the brachial plexus that contains fibers of C8 and T1 spinal nerves.
Detailed explanation-5: -The cervical plexus is made up of nerves originating from the cervical spine’s ventral rami from C1 to C4.