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. 2020 May 24;19:34. doi: 10.1186/s12938-020-00773-4

Table 1.

Stimulation electrodes with different levels of invasiveness

Type Typical current Advantages Disadvantages
Invasive
 Implanted 25 mA High stimulation specificity Require surgery
Suitable for long-term use Placement cannot be modified after implantation
 Percutaneous 25 mA High stimulation specificity Require surgery
Suitable for short-term use
Non-invasive
 Transcutaneous (surface) 2 mA–120 mA Do not require surgery Unsuitable for stimulation of deep muscles
Easy to reposition Often require higher stimulation current