A Methodology Study Of Brain Imaging Of Pain-Killers In Post-Traumatic Neuropathic Pain Patients

A Methodology Study To Assess The Feasibility Of Using Functional Magnetic Resonance Imaging (fRMI) To Quantify The Effects Of Analgesic Drugs In Post-Traumatic Neuropathic Pain Subjects

This study is a methodology study designed to discover whether a brain imaging technology is a better way of compare the relative sensitivities of fMRI and subjective psychometric assessments of pain to multiple doses of pregabalin and tramadol SR in a cross-over clinical study design.

Inclusion Criteria:

• Diagnosis of neuropathic pain associated with brush allodynia in specific dermatomes.
• Brush allodynia score of ≥4 and calculated average pain score of ≥3 on an 11-point numerical rating scale by the completion of down-titration of existing medications.
• Right-handed

Exclusion Criteria:

• Subjects with trigeminal neuralgia, central pain (due to cerebrovascular lesions, multiple sclerosis and/or traumatic spinal cord injuries including spinal surgery).
• Phantom limb pain, painful diabetic neuropathy.
• Subjects with any other co-existing pain which he/she or a qualified pain physician cannot differentiate from NeP of peripheral origin.
• Subjects with diabetes mellitus and with an HbA1C value of >10% upon measurement at screening.