In animal studies, pre-operative conditioning with electrical stimulation (ES) of the injured peripheral nerves promoted peripheral nerve regeneration in both sensory and motor fibres. We propose to conduct a clinical trial comparing 3 different treatments of complete digital nerve laceration before and after surgical repair. Participants will be randomized to one of three treatment arms: i) pre and post operative electrical stimulation, ii) pre-operative electrical stimulation alone , or iii) control group that receives sham pre and post-operative electrical stimulation. We will evaluate the effect of pre-operative electrical stimulation on axonal regeneration, as well as determine whether there is an additive effect of pre and post-operative electrical stimulation on sensory nerve axonal regeneration.