| The RNS System | |
|---|---|
| Where stimulation is delivered | 
                         
                        
                            Seizure source1(in the brain)  | 
                
| Monitors & responds to brain activity | Yes | 
| Records EEG data for your doctor to review | Yes | 
| Stimulation side-effects | No chronic stimulation side-effects3 | 
| VNS Therapy | |
|---|---|
| Where stimulation is delivered | 
                         
                        
                            Vagus nerve2(in the neck)  | 
                
| Monitors & responds to brain activity | No | 
| Records EEG data for your doctor to review | No | 
| Stimulation side-effects | Potential voice changes and hoarseness4 | 
            
                    
                    
          