Brachial Plexus Reconstruction
The brachial plexus is the elaborate network of nerves arising from the cervical spine that controls every function of the arm — from shoulder strength to fingertip sensation. When it is injured, the consequences are profound. When it is reconstructed by a specialist, meaningful recovery is achievable.
The Brachial Plexus — The Most Complex Nerve Network in the Body
The brachial plexus is formed by five nerve roots emerging from the cervical and upper thoracic spinal cord — C5, C6, C7, C8, and T1. These roots combine into three trunks (upper, middle, lower), each of which divides into anterior and posterior divisions. The divisions reorganize into three cords (lateral, posterior, medial), which then give rise to the five major terminal branches that supply the entire upper extremity.
Understanding which part of the brachial plexus is injured — and at what level — is the critical first step in planning reconstruction. Upper root injuries (C5-C6) affect shoulder abduction, elbow flexion, and forearm rotation. Lower root injuries (C8-T1) affect hand intrinsics and grip. Complete injuries (all roots) produce global arm paralysis. Each pattern has a specific reconstruction strategy.
Upper Trunk — "Erb's Palsy"
Loss of shoulder abduction, elbow flexion, forearm supination, and wrist extension. The classic "waiter's tip" posture. Most common pattern; best prognosis with surgery.
Middle Trunk
Elbow and wrist extension weakness. Often injured alongside upper or lower trunk. Isolated middle trunk injuries are less common.
Lower Trunk — "Klumpke's Palsy"
Loss of hand intrinsic muscles, finger flexion, and wrist flexion. Causes claw hand deformity. Grip and fine motor function severely impaired. Horner's syndrome may accompany T1 avulsion.
Complete Brachial Plexus Injury
Total arm paralysis and anaesthesia from shoulder to fingertip. The most devastating pattern. All five roots may be avulsed from the cord, ruling out direct repair. Nerve transfer surgery remains the only viable reconstruction pathway.
What Each Level Controls
Deltoid & Biceps
Shoulder abduction (deltoid), elbow flexion (biceps), forearm supination. Injury causes inability to raise the arm or flex the elbow.
Wrist Extensors & Biceps
Wrist extension, elbow flexion and supination, sensation over thumb and index finger. Often injured alongside C5 in upper trunk injuries.
Triceps & Wrist Flexors
Elbow extension, wrist and finger extension, middle finger sensation. Isolated C7 injuries affect extension more than flexion.
Finger Flexors
Finger and thumb flexion, intrinsic hand muscles, ring and little finger sensation. Loss causes significant grip weakness.
Hand Intrinsics
Intrinsic hand muscles (lumbricals, interossei), fine motor control, little finger sensation. T1 avulsion may cause Horner's syndrome (ptosis, miosis, anhidrosis).
Four Types of Brachial Plexus Injury
Not all brachial plexus injuries are equal. The type of injury — determined by the mechanism, the force involved, and the level of nerve damage — is the single most important factor in determining which reconstruction approaches are feasible and what outcomes can be expected.
Neuropraxia
The nerve is compressed or stretched but the axons remain intact. Conduction is temporarily blocked but the nerve structure is preserved. Recovery occurs spontaneously within days to weeks — surgery is not required.
Common after contact sports injuries or "stingers." Symptoms are transient and should resolve completely. If they persist beyond 6 weeks, further evaluation is indicated.
Usually recovers spontaneouslyAxonotmesis
The axon is disrupted but the surrounding connective tissue (endoneurium, perineurium) remains intact. The nerve can regenerate along its original pathway, but recovery is slow and may be incomplete — particularly for proximal injuries.
Watchful waiting is appropriate for 3–4 months. If motor recovery is absent or inadequate at that point, surgical exploration and possible reconstruction is indicated.
May recover; surgery if incompleteNeurotmesis / Rupture
The nerve is completely disrupted — axon, endoneurium, perineurium, and epineurium are all torn. Spontaneous recovery does not occur. Surgical reconstruction — nerve grafting, nerve transfer, or a combination — is required to restore function.
Surgery should be performed within 3–6 months of injury for best outcomes. Intraoperative electrophysiology guides which portions of the plexus remain viable for grafting versus transfer.
Surgery required — grafting / transferAvulsion
The nerve root is torn directly from the spinal cord. This is the most devastating injury — the proximal stump no longer exists at the cord level, making direct repair or grafting at the root impossible. Nerve transfer from distant donor sources is the only viable reconstruction pathway.
Diagnosed on MRI neurography (pseudomeningoceles) and confirmed at surgery. Avulsions are common in high-energy trauma and often involve multiple roots simultaneously.
Nerve transfer only — most complexSymptoms by Injury Level
Brachial plexus injury symptoms vary dramatically depending on which nerve roots are affected. The pattern of weakness, sensory loss, and reflexes tells the examining surgeon exactly where the injury is located — guiding the reconstruction strategy before imaging is even performed.
C5 – C6 (Upper Trunk)
C8 – T1 (Lower Trunk)
C5 – T1 (All Roots)
Reconstruction Approaches for Brachial Plexus Injury
Brachial plexus reconstruction is not a single operation — it is a carefully sequenced programme of surgical interventions, each targeting a specific functional goal. Dr. Michaeli designs an individualized reconstruction strategy for every patient based on the injury pattern, available donor nerves, timing, and functional priorities.
Neurolysis
For injuries in continuity where scar tissue is compressing an intact but dysfunctional nerve, neurolysis (surgical release of the nerve from scar) can restore conduction and allow spontaneous recovery to proceed.
Continuity lesions · Grade II–IIINerve Grafting
For ruptured nerve roots with a gap between viable proximal and distal stumps, sural nerve cable grafts bridge the defect and provide a scaffold for axon regeneration. Multiple cable grafts reconstruct large-diameter brachial plexus elements.
Ruptures · Gaps with proximal stumpNerve Transfer (Neurotization)
The cornerstone of avulsion reconstruction. Expendable donor nerves — intercostal, phrenic, spinal accessory, Oberlin fascicle, contralateral C7 — are rerouted to reinnervate specific targets, bypassing inaccessible avulsion levels.
Avulsions · Proximal injuriesCombined Grafting + Transfer
Most complete brachial plexus reconstructions use multiple techniques simultaneously — grafting available ruptured roots while using nerve transfers for avulsed levels. Each nerve is addressed with the most appropriate technique for that specific injury type.
Complete injuries · Mixed patternsFree Functioning Muscle Transfer
For late presentations (over 12–18 months) where denervated muscles are beyond reinnervation, a free muscle flap — gracilis is most common — is transplanted with microsurgical vascular and nerve anastomosis to restore a specific function (typically elbow flexion or finger extension).
Late reconstruction · Irreversible atrophySecondary Tendon & Muscle Transfers
When nerve reconstruction achieves reinnervation of some muscles but not others, secondary orthopaedic procedures — tendon transfers, joint fusions, osteotomies — realign the functional musculature to maximise the use of available motor power.
Secondary procedures · Maximise functionThe Window for Reconstruction Is Not Indefinite
Unlike fractures or soft tissue injuries, peripheral nerve reconstruction has a biological time limit. Motor end-plates — the muscle receptors waiting to accept reinnervating axons — undergo irreversible fibrotic degeneration over time without nerve supply. Once this occurs, no amount of surgical nerve reconstruction can restore motor function to that muscle, regardless of how successfully the nerve regenerates.
This makes prompt specialist evaluation non-negotiable for brachial plexus injuries. Every month of delay narrows the surgical options and reduces the ceiling of functional recovery.
Seek Specialist Evaluation Immediately
Do not wait for symptoms to "settle." A neurological examination and MRI neurography should be arranged within weeks of injury — not months.
Avulsions Require Urgent Surgery
Root avulsions will never recover spontaneously. Once diagnosed, surgical planning for nerve transfer should begin without delay to preserve the end-plate window.
Watchful Waiting Has Limits
For potential axonotmesis, re-evaluate at 3–4 months. If no EMG signs of reinnervation are present, proceed to surgical exploration rather than continuing to wait.
Prioritise Proximal Function First
In complete injuries, address elbow flexion and shoulder stability first — these provide the most functional independence. Distal reconstruction follows in staged procedures.
The Evaluation & Reconstruction Process
Brachial plexus reconstruction requires the most thorough pre-operative evaluation of any nerve surgery. The decision between neurolysis, grafting, nerve transfer, free muscle transfer, or combinations thereof is made only after a comprehensive assessment of the injury pattern, available donors, and patient goals.
Specialist Consultation
Full neurological examination, history of injury mechanism, review of prior imaging. Neurological grading of each root level assessed clinically.
EMG & NCS
Electrodiagnostic testing grades injury severity, identifies which roots are axonotmetic vs avulsed, and establishes reinnervation baseline.
MRI Neurography
High-resolution MRI identifies pseudomeningoceles (avulsion signs), visualizes the nerve roots and plexus, and maps the injury zone in detail.
Surgical Plan
A personalized reconstruction strategy is designed — selecting techniques for each root and prioritizing functional goals in sequence.
Surgery & Follow-Up
Intraoperative electrophysiology guides final decisions. Post-operative physiotherapy, EMG monitoring, and staged secondary procedures follow.
Outcomes by Injury Pattern
Brachial plexus reconstruction outcomes depend heavily on injury type, timing, patient age, and the technique used. The figures below represent published ranges for well-performed, timely surgery by experienced peripheral nerve surgeons. Honest goal-setting is fundamental to every patient consultation.
Recovery After Brachial Plexus Reconstruction
Consistent Physiotherapy
Passive range of motion must be maintained throughout the reinnervation period to prevent joint stiffness and contracture.
Electrical Muscle Stimulation
Neuromuscular electrical stimulation preserves muscle bulk and delays end-plate atrophy during the long waiting period for reinnervation.
Regular EMG Monitoring
Serial EMG/NCS tracks the advancing Tinel's sign and early reinnervation — confirming surgical success and guiding therapy progression.
Cortical Re-mapping Therapy
Mental imagery, mirror therapy, and biofeedback support cortical re-mapping — particularly important for nerve transfers using donor nerves with different original cortical representations.
Patience — Recovery Takes Years
Brachial plexus recovery is measured in years, not months. Continued improvement can occur for up to 3–4 years after surgery. Functional gains do not plateau early.
Post-Operative Wound Healing & Immobilisation
The arm is protected in a sling or splint depending on the operative approach. Wound healing is the priority. Passive range-of-motion exercises begin immediately to prevent joint stiffness. No voluntary muscle activity is expected at this stage.
Protected PhaseActive Physiotherapy & Neuromuscular Stimulation
Intensive physiotherapy begins — focusing on passive and active-assisted range of motion, positioning, and muscle stimulation. The advancing Tinel's sign is monitored at each follow-up visit to confirm axon regeneration is progressing along the reconstructed pathway.
Active RehabFirst Signs of Voluntary Motor Activity
Depending on the injury level and reconstruction type, the first voluntary muscle contractions become detectable — often a flicker in the biceps or deltoid. This is a landmark milestone. Active strengthening exercises are progressively introduced alongside passive maintenance.
Reinnervation MilestoneProgressive Strengthening & Functional Training
Motor strength builds progressively as reinnervation matures. Functional training introduces task-specific exercises — reaching, lifting, hand-to-mouth — targeting the specific goals prioritised in the surgical plan. Secondary procedures may be performed during this period if indicated.
Strengthening PhaseMaximum Functional Recovery & Secondary Surgery
Nerve reconstruction continues to mature — meaningful improvements in strength and coordination can occur up to 3–4 years post-operatively. Secondary tendon transfers, joint procedures, or free muscle transfers may be scheduled to augment function once primary nerve reconstruction has reached its ceiling.
Long-Term Recovery
Dr. Oren Michaeli
Peripheral Nerve & Brachial Plexus Surgeon · New Jersey & New York
Brachial plexus reconstruction is among the most technically challenging and emotionally significant surgeries in peripheral nerve medicine — requiring deep anatomical knowledge, microsurgical precision, and the strategic judgement to design the right reconstruction sequence for each unique injury pattern. Dr. Oren Michaeli's practice is named for this complexity: The Peripheral Nerve & Brachial Plexus Center exists specifically to serve patients with the most demanding nerve injuries.
Patients travel from New Jersey, New York, Long Island, and across the eastern United States — including many who have been told that their injury is inoperable or that nothing further can be done. Dr. Michaeli's expertise in nerve transfer surgery, combined reconstruction planning, and secondary reconstructive procedures means there is almost always an option worth exploring.
Insurance & Coverage
We accept most major commercial insurance plans. Contact our office to verify your specific benefits.
A Devastating Injury.
A Specialist Who Can Help.
Brachial plexus injuries are life-altering — but they are not the end of the story. Modern nerve reconstruction offers meaningful recovery for patients who receive specialist care in time. Don't wait. A consultation with Dr. Michaeli may change everything.