Table 2 Diagnostic criteria for neuropathic pain and neuritis

1. Pain with a distinct neuroanatomically plausible distribution, with motor impairment and/or sensory signs in the correspondent nerve;

2. Demonstration of any neural lesion in the electrophysiological examination results in correspondent nerve of pain area, except with demyelinating electrophysiological signs with criteria for neuritis

1. Neural pain in conjunction with motor impairment and/or sensory signs in the correspondent nerve;

2. Demonstration of neural lesion with demyelinating signs in the electrophysiological examination results, in correspondent nerve of pain area; If patients had already treated for neuritis in correspondent nerve of pain area previously, they were allocated to the neuropathic pain group

3. Satisfactory response of up to one month of corticoid therapy (pain relief or clinical improve)