Nerve lesions caused by traumatic events to the lower extremity's peripheral nerves are rated using Section 16.4 of the sixth edition of the AMA Guides to the Evaluation of Permanent Impairment (AMA Guides). Results from sensory and motor nerve tests are used to assign the impairment class within Table 16-12, Peripheral Nerve Impairment (6th ed, 534). The default rating may be modified with the functional history and clinical studies modifiers, but not the physical examination modifier, because it is used to assign the impairment class and define the degree of neurologic severity. Impairment for both sensory and motor deficits are assigned and then combined at the lower extremity level.

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