Overview
Spinal cord stimulation (SCS) is an implantable neuromodulation therapy that delivers mild electrical pulses to the spinal cord, modulating pain signals before they reach the brain. It is among the most extensively studied interventional pain treatments, with decades of evidence supporting its effectiveness for failed back surgery syndrome, complex regional pain syndrome (CRPS), neuropathic leg pain, and other chronic pain conditions. Modern SCS systems have advanced dramatically — offering high-frequency, burst, and closed-loop stimulation waveforms that provide effective relief without the paresthesia (tingling) of older devices. Dr. Migdale is fellowship-trained in SCS implantation and management.
How Spinal Cord Stimulation Works
SCS works through a process called neuromodulation — altering the way the nervous system processes and transmits pain signals. Electrical pulses delivered to the dorsal columns of the spinal cord activate large-diameter sensory fibers that inhibit pain-transmitting pathways — a mechanism described by the Gate Control Theory of Pain. Modern SCS systems also work through additional mechanisms including central sensitization modulation and descending pain inhibition pathway activation.
The Trial Period
Before permanent SCS implantation, a trial period of 5–10 days is standard practice. Trial leads are placed in the epidural space (adjacent to the spinal cord) under fluoroscopic guidance, connected to an external stimulator. During the trial, you go about your normal activities while evaluating the stimulation's effectiveness. If you achieve ≥50% pain relief during the trial, permanent implantation of the pulse generator (IPG) is considered successful and proceeds as a separate procedure.
Modern SCS Technology
Today's SCS systems are far more sophisticated than earlier generations. High-frequency stimulation (10 kHz, e.g. HF10 therapy) and burst stimulation patterns provide effective relief without the paresthesia of conventional stimulation — important for patients who find tingling uncomfortable or distracting. Closed-loop systems (e.g. Evoke) continuously measure spinal cord responses and automatically adjust stimulation in real time. MRI-conditional systems allow patients to have MRI scans after implantation.