If you have a nerve injury, whether at the spine or further out in a limb, at some point, someone may send you for a nerve conduction study. You will lie on a couch while a neurophysiologist delivers small electrical pulses to your skin and, a little later, puts a fine needle into one or two muscles. A few weeks after that, a report lands with your consultant. It is dense, full of numbers and abbreviations, and it is written for one clinician to read to another. Almost nobody explains it to the person whose nerve it describes. Just this morning, I read a note from a client who said, "I had a nerve conduction test, which indicated severe injury to the nerves." You might wonder, like me, what severe means, and what do I do about it?

Nerve repair surgery—whether nerve grafting, nerve transfer, or direct repair—offers hope for people with peripheral nerve injuries, including brachial plexus injuries. However, surgery is just the beginning of the recovery journey. After the surgeon has reconnected or rerouted nerves, there's a waiting period while regenerating nerve fibres grow toward their target muscles. This process is slow, measured in months rather than weeks.

During this waiting period, a critical question arises: what happens to the muscles? Without nerve signals, they begin to atrophy and deteriorate. If the muscle degenerates too severely before reinnervation occurs, even successful nerve regeneration may not restore function—the nerve reconnects, but finds a muscle no longer capable of responding.

This is where electrical stimulation plays a crucial role. By keeping muscles viable during the reinnervation window, stimulation can significantly improve the chances of functional recovery. In this article, I'll explain how nerve regeneration works, when to consider electrical stimulation, and what to expect throughout the process.

In this article we explain why functional electrical stimulation (FES) is an effective technique in enhancing functional recovery in patients with peripheral nerve injuries. The technique can improve muscle activation, prevent muscle atrophy, enhance muscular endurance and strength, and assist in nerve and axonal regeneration.

FES is a generally safe, non-pharmacologic intervention without significant side-effects, which adds an essential therapeutic option to neurological physiotherapy.

With muscle denervation the FES is designed to work directly with muscle fibre and not rely on the local nerve structure for success.

Further studies on FES are necessary to comprehend the scope, limitations, and best methodology. Programmes need to be customised for each user.