Modulation Effect of Transcranial Alternating Current Stimulation (tACS) on Chronic Low Back Pain

Inclusion Criteria: 1. Volunteers 18-60 years of age 2. Meet the Classification Criteria of the chronic LBP (having low back pain for more than 6 months) 3. At least 4/10 clinical pain on the 0-10 LBP NRS 4. At least a 10th grade English-reading level; English can be a second language provided that the patients understand all questions used in the assessment measures 5. Meeting the MRI / MEG / EEG screening criteria Exclusion Criteria: 1. Specific causes of back pain (eg, cancer, fractures, spinal stenosis, infections) 2. Complicated back problems (eg, prior back surgery, medicolegal issues…