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Anatomic Variants

There are lots of normal variants when it comes to nerve macro and microanatomy. 
These include:
• The roots that contribute to a specific peripheral nerve.
• The specific nerves that provide innervation to the end organ.
• The number of branches to a specific end organ.
Peripheral nerve anatomy is not a hard and fast science, individuals and their nerves vary and this must be kept in mind when evaluating and treating patients.