What does the transfer do?
It gives the facial muscles a new source of nerve signals.
The surgeon connects some or all of the hypoglossal nerve, which controls tongue movement, to the facial nerve.
Facial nerve reconstruction
Hypoglossal-Facial Nerve Transfer
Hypoglossal-facial nerve transfer connects a tongue-movement nerve to the facial nerve to help restore movement and resting symmetry after facial paralysis.
When might it be considered?
When facial nerve recovery is unlikely but the facial muscles can still respond to new nerve input.
The cause and duration of paralysis, muscle testing, and tongue function help determine suitability.
Is movement restored right away?
No. Nerve growth and retraining take months.
Improved resting support may develop before useful movement. A natural, spontaneous smile is not assured.
01 · Overview
A new nerve signal for facial movement
The facial nerve controls facial expression. When its original connection cannot recover, a nerve transfer may bring signals from another working nerve to the affected facial muscles. [1]
In a hypoglossal-facial transfer, the donor is the hypoglossal nerve, which normally moves the tongue. The surgeon may use a portion of this nerve, a side connection, or an intervening nerve graft to balance facial recovery with preservation of tongue function. [1]
This is different from a masseteric nerve transfer, which uses a chewing nerve, and from a muscle transfer, which brings in a new muscle. It treats facial paralysis—not a hand or wrist condition—and does not directly restore facial sensation. [1]
- Treatment area
- Facial nerve, with a donor nerve in the upper neck
- Anesthesia
- Usually general anesthesia
- Main requirement
- Facial muscles that remain suitable for reinnervation
- Recovery focus
- Incision healing followed by months of nerve recovery and retraining
Why does the length of time with paralysis matter?
Muscles can lose their ability to respond after prolonged loss of nerve input. Your surgeon reviews the timeline and may use electrical testing to decide whether a nerve transfer is still useful or whether another reconstruction would better fit your needs.
Will I need to move my tongue to move my face?
Early facial movement may require deliberate tongue activation. Rehabilitation helps you practice controlled facial movement with less obvious effort, but automatic emotional expression may remain limited.
02 · Concerns & Goals
What you may want help with
Facial paralysis can change how you look, speak, eat, and protect your eye. Your priorities help guide the surgical discussion.
A drooping face at rest
Reduced muscle tone can lower the corner of the mouth and change facial balance.
Difficulty with expression
Smiling and other expressions may feel uneven or difficult to produce.
Eating and speaking changes
Weak lip closure can contribute to drooling, food collecting in the cheek, or difficulty forming certain sounds.
Incomplete eye closure
An exposed eye needs its own protection plan. A nerve transfer does not provide immediate eye protection, and separate eyelid treatment may be needed.
03 · Options
How the approaches differ
These are surgical approaches to discuss, not interchangeable choices. Anatomy, prior surgery, and tongue function influence which connection is possible.
Partial hypoglossal transfer
Uses part of the tongue nerve rather than dividing it completely.
How it worksA portion of the donor nerve is connected to the facial nerve.
May suitSelected patients whose anatomy allows a partial transfer.
Main tradeoffIt aims to preserve tongue function, but tongue weakness and limited facial recovery remain possible.
End-to-side connection
Connects the facial nerve to the side of the tongue nerve.
How it worksThe surgeon prepares a side opening in the donor nerve while preserving its continuity.
May suitSelected patients in whom the facial nerve can reach the donor safely.
Main tradeoffThe connection may require substantial nerve mobilization, and recovery is variable.
Jump graft
Uses a nerve graft as a bridge.
How it worksA graft links the side of the hypoglossal nerve to the facial nerve.
May suitPatients whose planned connection benefits from extra reach.
Main tradeoffIt adds nerve junctions and may require a separate graft-harvest incision with local numbness.
Complete hypoglossal transfer
Uses the full donor nerve connection.
How it worksThe hypoglossal nerve is divided and connected to the facial nerve.
May suitSelected circumstances after careful discussion of tongue-related consequences.
Main tradeoffLoss of nerve supply to one side of the tongue can affect speech and swallowing; tongue-sparing approaches are often considered instead.
Technique names may overlap. Ask your surgeon exactly how much of the tongue nerve will be used and whether a graft is planned. [1].
Can this be combined with other procedures?
Yes. Eyelid procedures, static facial support, or other facial reanimation procedures may address needs that this transfer cannot meet alone. Each addition changes the recovery plan and risks.
Is a tongue-sparing technique risk-free?
No. Preserving part of the nerve may reduce tongue-related harm, but weakness, speech changes, swallowing problems, or an inadequate facial response can still occur.
04 · Results
What may improve and what may remain
Resting support
Improved muscle tone may help the face look more balanced at rest.
- The degree of improvement varies with muscle health and nerve recovery.
- Perfect symmetry is not a realistic expectation.
Movement and control
Useful movement requires nerve growth and practice.
- Early movement may be linked to tongue effort.
- Smiling, blinking, and mouth control may recover differently.
- Some patients have little useful movement despite surgery.
Long-term refinement
Rehabilitation and additional treatment may remain part of care.
- Unwanted linked movements or tightness may need treatment.
- Separate procedures may be considered for eyelid protection or facial balance.
Recovery is assessed over many months. Incision healing and return to daily routines do not mean nerve recovery is complete. [1]
05 · Recovery
Planning your recovery
Recovery at a glance
- Stay after surgery
- Determined by Your Surgeon
- Initial recovery at home
- Varies by Individual
- Return to desk work
- Varies by Procedure and Work Activity
- Light daily activities
- Based on Individual Recovery
- Strenuous exercise
- Based on Surgeon Clearance
Returning to work does not mean fully healed. Follow your surgeon’s instructions; strenuous activity requires clearance.
Your recovery plan depends on the nerve connection, any graft, and other procedures performed. Follow your surgical team's instructions rather than a general timeline.
Step 1 · Day of surgery
Treatment day
After anesthesia, the team monitors your incision, comfort, tongue movement, and swallowing. Whether you stay overnight depends on the operation and your health.
Step 2 · First days to weeks
Early healing
Swelling, bruising, and incision discomfort may occur. Your team checks wound healing and any changes in speech or eating.
Step 3 · Following months
Waiting for nerve growth
Visible facial movement is not expected immediately. Follow-up examinations help track recovery and determine when targeted retraining should begin.
Step 4 · Many months and beyond
Building control
Specialized facial therapy may help coordinate movement. Your team also watches for tightness, unwanted linked movements, and persistent functional needs.
Planning everyday activities
ActivityGeneral planning contextWhat affects the plan
Work and social routinesPlanning context: Return depends on comfort, fatigue, speech demands, and job duties.What affects it: Returning to work is not the same as complete healing or nerve recovery.
Eating and drinkingPlanning context: Tongue weakness or swallowing changes may alter your plan. [1]What affects it: Ask whether you need a swallowing assessment or temporary food-texture changes.
Exercise and liftingPlanning context: Restrictions depend on the incision and any additional procedures.What affects it: Your surgeon should specify when to resume strenuous activity.
Facial exercisesPlanning context: Start and progress under a clinician experienced in facial nerve rehabilitation. [1]What affects it: Training should match the stage of nerve recovery rather than rely on forceful repetition.
Ask your surgical team whether compresses are appropriate and exactly how to use them.
Before your procedure
- Bring a timeline of the paralysis and records of prior treatment or surgery.
- Review all medicines and supplements with the team; do not stop prescribed medicines on your own.
- Discuss nicotine use and the surgeon's requirements for stopping it.
- Report existing tongue weakness, choking, voice changes, or swallowing difficulty.
- Confirm your eye-protection plan if the eyelid does not close fully.
- Arrange transportation, help at home, and access to follow-up and facial rehabilitation.
What if my face does not move during early recovery?
A delay is expected because nerve fibers must grow to the muscles. Keep follow-up visits so your surgeon can distinguish expected waiting from a recovery that needs further assessment.
Will rehabilitation involve my tongue?
It may initially use gentle tongue activation to help recruit facial movement. Your therapist should tailor the exercises to your connection and progress, especially if speech or swallowing is affected.
06 · Safety
Risks and what your clinician assesses
Temporary swelling, bruising, numbness near the incision, and discomfort can occur. New swallowing difficulty, worsening weakness, or increasing swelling should be reported rather than assumed to be routine.
Tongue weakness
The donor side of the tongue may become weak or smaller. The risk depends partly on how much nerve is used.
Speech or swallowing changes
Tongue dysfunction can affect clear speech and moving food safely. Some patients need speech or swallowing therapy.
Limited facial recovery
Nerve growth may not produce enough useful movement, and asymmetry may persist.
Unwanted linked movement
Facial muscles may move together unintentionally, or tightness and tongue-linked facial movement may develop.
Wound and graft-site problems
Bleeding, infection, fluid collection, visible scars, or sensory changes can occur. A harvested nerve graft can leave numbness at its donor site.
Anesthesia and surgical complications
Anesthesia reactions, blood clots, or injury to nearby structures are possible. Your personal risks depend on your health and the planned operation.
Discuss these risks and your individual health history with your surgeon. [1]
What your clinician assesses
- Cause, duration, and completeness of facial paralysis
- Facial muscle viability and available facial nerve anatomy
- Tongue strength, speech, swallowing, and other cranial nerve function
- General health, prior surgery or radiation, and ability to participate in rehabilitation
07 · Costs
What makes up the Total Procedure & Care Cost
Compare written estimates for the same planned scope, including the nerve connection, any graft, additional facial procedures, and rehabilitation.
Surgeon
Surgical care
Surgeon services for the transfer and any agreed additional procedures.
Ask your surgeonAsk whether graft harvesting, assistant fees, and later revisions are included.
Facility
Anesthesia and facility
Anesthesia services, operating-room use, and any planned hospital stay.
Ask your surgeonAsk who bills separately and how an overnight stay affects the estimate.
Supplies
Supplies and follow-up
Postoperative supplies, visits, testing, and rehabilitation when included.
Ask your surgeonConfirm which therapy visits, medicines, and tests require separate payment.
TRC
Patient Services
Any separately listed scheduling, records, or care-coordination services.
Ask TRCAsk whether there is a charge, what it includes, and whether it is optional.
Your written estimate should explain the services included, any separate charges, and payment terms.
08 · Questions
Common questions
Is this a treatment for new Bell's palsy?
It is not usually an initial treatment for new Bell's palsy, which often improves without nerve transfer. New facial weakness needs prompt medical assessment to establish the cause and protect the eye.
Will my tongue still work normally?
Tongue-sparing approaches aim to preserve function, but normal function cannot be guaranteed. Discuss your existing speech and swallowing needs before choosing a technique.
Will this restore a spontaneous smile?
Not reliably. The new signal comes from a tongue-movement nerve rather than the original facial expression pathway. Deliberate activation and training may remain necessary.
Will insurance cover it?
Coverage depends on your plan, the medical reason for surgery, network status, and authorization requirements. Confirm coverage for surgery and rehabilitation separately.
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View in My TRC workspaceMy Aesthetic Plan
Prepare for your consultation
Bring these to help your consultation:
- Confirm the connection technique, graft plan, and any additional procedures.
- Get a written plan for eye protection, swallowing concerns, follow-up, and rehabilitation.
- Review the itemized estimate and insurance requirements before scheduling.
View My Aesthetic Plan
Choices stay in this visit until saving to your account completes. Nothing is sent to a clinician.
Sources
- [1]Mayo Clinic — facial reanimation and facial paralysis educationFacial reanimation using nerve transfers, hypoglossal donor considerations, muscle viability, alternative reconstructions, delayed recovery, and rehabilitation.
- [2]MedlinePlus — Facial paralysisCauses and evaluation of facial paralysis, eye protection needs, and urgent assessment of facial weakness associated with stroke symptoms.
Photographs are illustrative scenes, not patients, staff, facilities or outcomes. This information does not replace a personal assessment by your treating clinician.