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Updated: May 11, 2026

Standardized Induction and Assessment of Long-term Potentiation-like Cortical Plasticity Using Transcranial Magnetic Stimulation
Published on: November 7, 2025
Lengthening temporalis myoplasty and brain plasticity: a functional magnetic resonance imaging study
1Maxillo-facial and plastic surgery unit, Caen university hospital, avenue de la Côte-de-Nâcre, Caen cedex, France. rachid-cmf@hotmail.fr
Background:
Lengthening temporalis myoplasty (LTM) is a technique developed since ten years for facial paralysis. A spontaneous smile is acquired after this surgery explains by brain plasticity and the aim of the study is to confirm this plasticity by functional magnetic resonance imaging.
Materials And Methods:
A functional magnetic resonance imaging (fMRI) was performed at various time points in ten patients who were operated on LTM during one year.
Results:
Two different areas were found to be involved in chewing and smiling. We observed changes in the areas involved in smiling and chewing three months after surgery, and these changes persisted for at least one year.
Conclusions:
Our findings thus confirm that brain plasticity underlies the clinical observation of acquisition of a spontaneous smile.
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Brain Imaging
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).
Long-term Potentiation