Effectiveness of Transcranial Direct Current Stimulation for TKR

Effectiveness of Transcranial Direct Current Stimulation for Postoperative Pain in Total Knee Replacement Surgery

Transcranial direct current stimulation (tDCS) is a technique of noninvasive cortical stimulation allowing significant modification of brain function used. Clinical application of this technique could be helpful for pain, Parkinson's disease, dystonia, cerebral palsy and dementia etc. And tDCS is safe with only mild, transient adverse effects. But there is few studies focused to postoperative states.

The aim of this project is to reveal the effect of tDCS for postoperative pain after total knee replacement surgery,

Inclusion Criteria:

• Subjects who have scheduled elective spine surgery.

Exclusion Criteria:

• Who has Cognitive dysfunction before surgery.
• Who already has delirium before surgery.
• Who has pain disorder ( like CRPS)
• Who cannot reveal the one's pain.