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Related Experiment Video

Updated: Mar 6, 2026

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer

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Published on: March 1, 2015

Platysma Motor Nerve Transfer for Restoring Marginal Mandibular Nerve Function.

Andres Rodriguez-Lorenzo¹, David Jensson¹, Wolfgang J Weninger¹

¹Department of Plastic and Maxillofacial Surgery, Uppsala University Hospital, Uppsala, Sweden; Department of Surgical Sciences, Uppsala University, Uppsala, Sweden; and Center of Anatomy and Cell Biology and Division of Plastic and Reconstructive Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria.

Plastic and Reconstructive Surgery. Global Open

|March 16, 2017

Summary

This summary is machine-generated.

Platysma motor nerve (PMN) transfer to the marginal mandibular nerve (MMN) offers a feasible solution for lower lip paralysis. This nerve transfer technique achieved successful functional recovery in a clinical case, demonstrating minimal donor-site morbidity.

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Facial Nerve Surgery in the Rat Model to Study Axonal Inhibition and Regeneration

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Published on: May 5, 2020

Area of Science:

Neurosurgery
Facial Nerve Reconstruction
Microsurgery

Background:

Marginal mandibular nerve (MMN) injuries cause lower lip paralysis and smile asymmetry.
Conventional nerve repairs can be challenging for long nerve gaps or delayed reconstructions.
Investigating platysma motor nerve (PMN) transfer to the MMN offers a potential solution for restoring lower lip function.

Purpose of the Study:

To assess the anatomical and technical feasibility of PMN to MMN transfer for MMN injury reconstruction.
To evaluate the clinical outcome of this nerve transfer in a patient with MMN paralysis.

Main Methods:

Dissection of ten adult cadavers to analyze MMN and PMN anatomy.
Measurement of PMN dissection length and its reach for coaptation with MMN.
Histomorphometric analysis of MMN and PMN branches.

Main Results:

Consistent MMN and PMN anatomy observed across dissections.
Tension-free coaptation of PMN to MMN was achievable in all cases.
Histomorphometry revealed sufficient myelinated fiber counts in both nerves; clinical case showed 3-year functional recovery.

Conclusions:

PMN to MMN transfer is an anatomically feasible procedure for isolated MMN injuries.
Direct nerve coaptation facilitated faster, complete recovery of lower lip function.
This technique minimizes donor-site morbidity and the need for central relearning.