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Health condition · Clinically reviewed

Function loss from an old nerve injury, assessment, reconstruction and rehabilitation.

Weeks, months or years after a nerve injury, useful function can often still be restored. A specialist peripheral nerve MDT is the right place to start.

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A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against BSSH, BAPRAS, NHS specialist peripheral nerve service pathways and peer-reviewed sources.

  • 03

    Current for 2026

    Reflects modern UK peripheral nerve reconstruction, nerve transfer and neuromodulation options.

Key facts

Old nerve injury at a glance.

The essentials in plain English - what it is, why timing matters and how UK peripheral nerve teams approach late presentations.

  • What it is

    Chronic loss of motor, sensory or autonomic function after a peripheral nerve injury that was not fully repaired at the time.

  • Common scenarios

    Old trauma, obstetric brachial plexus injury, iatrogenic surgical injury, missed compartment syndrome and perioperative positioning injury.

  • Classification

    Seddon (neurapraxia, axonotmesis, neurotmesis) and Sunderland (I to V) grade both the anatomy and the recovery potential.

  • Timing matters

    Primary repair works best within 72 hours. After 6 to 12 months the motor endplate begins to fibrose and repair options narrow.

  • It is rarely too late

    Even years on, nerve transfers, tendon transfers, free functioning muscle transfer and neuromodulation can restore useful function.

  • Specialist care

    UK peripheral nerve MDTs at Queen Square, Manchester, Nottingham and other commissioned centres coordinate reconstruction, therapy and pain care.

Why this guide matters

Late does not mean untreatable.

Old nerve injuries are often dismissed as fixed. In modern UK practice, many can still be improved - the three points below shape the rest of the page.

  • Time to muscle matters most

    Once the motor endplate has fibrosed - typically after 18 months - direct nerve repair no longer works. Reconstruction planning is about beating that clock or working around it.

  • The MDT sees more than a scan

    A commissioned peripheral nerve team combines neurophysiology, high-resolution imaging, surgery, therapy and pain care - a scan alone rarely settles the plan.

  • Reconstruction is a menu, not a switch

    Nerve grafts, nerve transfers, tendon transfers, free muscle transfer, FES, TMR and neuromodulation - the right mix depends on the injury and on you.

How the diagnosis is made

From injury history to a reconstruction plan.

The steps a UK peripheral nerve service will normally follow, in order - so you know what to expect and why.

  1. 01

    Assessing

    Injury history and timeline

    Mechanism, date, initial treatment, any repair attempted and how function has changed since. Duration is the single biggest prognostic factor.

  2. 02

    Assessing

    Motor and sensory examination

    A structured neurological exam - power, tone, wasting, fasciculation, dermatomal sensation, reflexes, Tinel sign over the lesion and joint range.

  3. 03

    Assessing

    Functional impact

    Hand grip, fine motor tasks, gait, ability to work, drive and self-care. This anchors what any reconstruction is trying to restore.

  4. 04

    Confirming

    Nerve conduction studies and EMG

    Specialist neurophysiology localises the lesion, grades severity and looks for reinnervation activity that predicts spontaneous recovery.

  5. 05

    Confirming

    MRI and high-resolution nerve ultrasound

    Specialist musculoskeletal imaging shows nerve continuity, neuroma, scar tissue and muscle atrophy - guiding whether reconstruction is feasible.

  6. 06

    Planning

    Specialist peripheral nerve referral

    A commissioned UK peripheral nerve service brings plastic surgery, orthopaedics, neurology, pain and rehabilitation together in one MDT.

  7. 07

    Planning

    Shared reconstruction plan

    Realistic goals, expected recovery timeline and the sequence of surgical and non-surgical steps - agreed with you before anything begins.

Typical timeline: first specialist visit to an agreed plan in weeks, not years.

Symptoms

What chronic nerve loss looks like.

A mix of motor, sensory, autonomic and pain features - plus the everyday functional cost. Some patterns need urgent escalation.

  • Weakness and wasting

    A lower motor neurone pattern - flaccid weakness, visible muscle atrophy and sometimes fasciculation in the affected group.

  • Sensory loss or numbness

    Loss of touch, pinprick or proprioception in a dermatomal or peripheral nerve distribution.

  • Neuropathic pain

    Burning, shooting, electric-shock or crawling pain, often with hyperalgesia and allodynia in the injured territory.

  • Tinel sign at the injury site

    Tapping over the nerve triggers tingling down its distribution - a useful clinical marker of a neuroma or regenerating axons.

  • Autonomic changes

    Dry, shiny or discoloured skin, temperature difference and altered sweating in the affected area.

  • Joint contracture

    Fixed shortening across joints that have not moved through range - a preventable but common late complication.

  • Functional impairment

    Difficulty with grip, pinch, buttons, writing, walking or foot clearance - the everyday cost of the deficit.

  • Red flag - cauda equina or acute compression

    New bladder or bowel change, saddle anaesthesia or rapidly progressive weakness needs same-day emergency assessment.

Treatment

How UK peripheral nerve teams restore function.

A layered plan - specialist assessment, therapy and orthotics first, then nerve or tendon reconstruction and pain care as needed.

  • Specialist peripheral nerve assessment

    Referral to a commissioned UK peripheral nerve MDT - the single most important step for anyone with an old, untreated nerve injury.

  • Orthotics and splinting

    Ankle-foot orthoses for foot drop, wrist and finger splints for radial or ulnar palsy - support function and prevent contracture while nerves recover.

  • Specialist hand and nerve therapy

    Specialist physiotherapy and occupational therapy - graded motor imagery, sensory re-education, desensitisation and task-specific retraining.

  • Functional electrical stimulation

    FES uses gentle electrical pulses to activate weak or partially reinnervated muscles - useful for foot drop and shoulder subluxation. See our FES guide.

  • Nerve grafts

    A donor nerve segment (usually sural or medial antebrachial cutaneous) bridges a gap where scarred nerve has been excised.

  • Nerve transfers

    A working donor nerve or fascicle is redirected to power a paralysed muscle. Oberlin transfer for elbow flexion is a classic example. Specialist commissioned service.

  • Free functioning muscle transfer

    A gracilis muscle is transplanted with its own vessels and nerve to restore movement when native muscle has fibrosed - specialist reconstruction.

  • Tendon transfers

    A working tendon is rerouted to replace a lost function - reliable, well-tested and often the best option late after injury.

  • Osteotomy and joint arthrodesis

    For fixed deformity or an unstable joint, corrective bone surgery or fusion restores a stable, functional position.

  • Neuroma and TMR

    Painful neuromas can be resected and the nerve end redirected. Targeted muscle reinnervation reroutes the nerve into a nearby muscle to prevent recurrence and control prosthetics.

  • Neuromodulation for chronic pain

    Spinal cord and dorsal root ganglion stimulators can quiet stubborn neuropathic pain when medication and injections have not been enough.

  • Prosthetics and osseointegration

    For amputation-related loss, modern myoelectric prosthetics and osseointegrated limbs restore function - through specialist commissioned centres.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or peripheral nerve team knows your injury and history and can tell you which parts apply to you. If in doubt, get seen.

  • British Society for Surgery of the Hand (BSSH). Standards for peripheral nerve surgery.

  • BAPRAS. Guidance on peripheral nerve reconstruction and free functioning muscle transfer.

  • NHS England. Specialised services for complex peripheral nerve injury (commissioned centres).

  • NICE NG193. Chronic pain (primary and secondary) in over 16s.

  • Sunderland S. Nerves and nerve injuries - classification framework in continuing use.

  • Brachial Plexus Injury Association (BPIA). Patient information and support.

Red flags

When nerve loss needs urgent attention.

Most chronic nerve deficits are managed on an outpatient basis. These are the situations that need faster review.

  • Acute compartment syndrome

    Severe, disproportionate pain with a tense limb after injury or surgery - a surgical emergency. Old missed compartment syndrome is a leading cause of late nerve dysfunction.

  • Cauda equina syndrome

    New bladder or bowel change, saddle anaesthesia or bilateral leg weakness - same-day emergency assessment.

  • Rapidly progressive weakness

    Any deficit that is worsening quickly, rather than stable or slowly improving, needs urgent neurology review.

  • Untreated obstetric brachial plexus injury

    Infants with persistent Erb palsy at three months should be seen by a specialist brachial plexus team - early surgery changes outcome.

  • Suspected iatrogenic nerve injury

    New deficit after surgery (carotid, hernia, hip or knee replacement, lymphadenectomy) - early neurophysiology and specialist review, not watchful waiting.

  • Neuropathic pain out of proportion

    Severe burning pain with skin changes, temperature difference and swelling may be CRPS - needs specialist pain input early.

  • Loss of protective sensation

    Insensate hand or foot is at risk of unnoticed burns, ulcers and joint damage - a specific safety plan is essential.

  • Perioperative positioning injury

    A new ulnar, common peroneal or brachial plexus deficit after theatre needs prompt documentation, neurophysiology and specialist review.

  • Psychological distress

    Chronic pain and functional loss carry a real mental-health burden - screen for low mood and PTSD and involve psychology early.

Living with it

A long game, with real gains along the way.

Four principles that make the biggest difference day to day - protecting what you have, doing the therapy, pacing pain and staying on the specialist radar.

A quiet reminder

Consistency beats intensity, every time.

Small, steady habits kept up over months do more for nerve recovery than a heroic week that does not last.

  1. 01 Protect

    Skin, joints and range

    Daily skin checks, moisturiser, avoiding burns and passive range-of-motion work stop preventable contractures and injuries.

  2. 02 Practise

    Therapy is the engine

    Reconstruction only works with the therapy that follows. Consistent hand or gait rehabilitation over months is what turns anatomy into function.

  3. 03 Pace

    Neuropathic pain has good days and bad

    Sleep, gentle activity, medication reviews and psychological support all matter. A pain-management team helps you build a realistic plan.

  4. 04 Ask

    It is rarely too late to be reviewed

    Even years after injury, a specialist opinion can find options - nerve transfer, tendon transfer, FES or neuromodulation - that a general clinic will not.

Frequently asked

Everything we get asked about old nerve injuries.

Quick answers on timing, classification, nerve transfers, chronic pain and UK specialist centres.

  • What is function loss from an old nerve injury?

    It is chronic weakness, numbness, pain or deformity that persists months or years after a peripheral nerve was damaged and either was not repaired, was repaired incompletely or did not recover. Common scenarios include old trauma, obstetric brachial plexus injury, iatrogenic surgical injury and missed compartment syndrome.

  • Is it too late to have surgery if my injury was years ago?

    Often not. Direct nerve repair or grafting works best within 6 to 12 months, but nerve transfers, tendon transfers, free functioning muscle transfer, targeted muscle reinnervation and neuromodulation remain useful late. A specialist peripheral nerve MDT is the right place to work out what is still possible.

  • What is the difference between Seddon and Sunderland classification?

    Seddon divides injury into neurapraxia (bruising, full recovery), axonotmesis (axon damage, partial recovery) and neurotmesis (complete transection, no spontaneous recovery). Sunderland refines this into grades I to V based on which layers of the nerve are disrupted. Both help predict recovery and guide whether to operate.

  • What is a nerve transfer, and how is it different from a nerve graft?

    A nerve graft bridges a gap in a damaged nerve with a donor nerve segment - useful when the ends are still healthy. A nerve transfer redirects a working nearby nerve or fascicle to power a paralysed muscle - useful when the injury is high, old or extensive. Both are done in specialist commissioned centres.

  • Can anything help long-standing neuropathic pain?

    Yes. A stepped approach uses neuropathic pain medication, specialist physiotherapy, psychological support, targeted injections, and - for stubborn cases - spinal cord or dorsal root ganglion stimulation. If a painful neuroma is driving symptoms, resection with TMR can help.

  • Where in the UK are peripheral nerve injuries treated?

    Complex peripheral nerve injury is commissioned by NHS England and delivered by specialist centres including Queen Square (London), Manchester, Nottingham and other regional units. Charities such as the Brachial Plexus Injury Association also offer patient support and information.

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