Dynamic facial reanimation using free gracilis transfer in children has an acceptable success rate, yields improved commissure excursion, and improves QOL in the pediatric population. It should be considered first-line therapy for children with lack of a meaningful smile secondary to facial paralysis.

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Introduction Rodent whisking behavior is supported by the buccal and mandibular branches of the facial nerve, a description of how these branches converge and contribute to whisker movement is lacking. Methods Eight rats underwent isolated transection of either the buccal or mandibular branch and subsequent opposite branch transection. Whisking function was analyzed following both transections. Anatomical measurements, and video recording of stimulation to individual branches, were taken from both facial nerves in 10 rats. Results Normal to near-normal whisking was demonstrated after isolated branch transection. Following transection of both branches whisking was eliminated. The buccal and mandibular branches form a convergence just proximal to the whisker-pad, named the “distal pes.” Distal to this convergence, we identified consistent anatomy that demonstrated cross-innervation. Conclusion The overlap of efferent supply to the whisker pad must be considered when studying facial nerve regeneration in the rat facial nerve model.

Platysmectomy is straightforward and seems effective in treating neck synkinesis associated with chronic hypertonic platysmal activity.