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Spontaneous trigeminal-facial reinnervation.

M D DeLacure¹, C T Sasaki, L G Petcu

¹Section of Otolaryngology, Yale University School of Medicine, New Haven, Conn. 06510.

Archives of Otolaryngology--Head & Neck Surgery

|September 1, 1990

Summary

Spontaneous recovery of denervated facial muscles can occur through trigeminal-facial nerve cross-innervation. This documented case explores the mechanisms behind this rare neurological phenomenon.

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Area of Science:

Neurology
Neuroscience
Clinical Medicine

Background:

Spontaneous recovery of denervated facial muscles is anecdotally reported but lacks comprehensive documentation.
Potential mechanisms include nerve cross-innervation and myoneurotization, where regenerating nerves reinnervate denervated muscles.

Observation:

Presents a clinical case with clear evidence of trigeminal-facial nerve cross-innervation.
Highlights the phenomenon of regenerating peripheral motor nerve branches reaching denervated muscle motor end plates.

Findings:

Provides unequivocal clinical evidence supporting trigeminal-facial cross-innervation as a cause for facial muscle recovery.
Reviews existing literature on the mechanisms of myoneurotization and nerve regeneration in facial palsy.

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Implications:

Suggests a potential pathway for functional recovery in cases of facial nerve injury.
Enhances understanding of peripheral nerve plasticity and reinnervation strategies.
Informs clinical approaches to managing facial nerve deficits and exploring novel therapeutic interventions.