What is the manifestation of incomplete motor regeneration in Bell palsy (idiopathic facial paralysis) (IFP)?

Updated: Jun 14, 2019
  • Author: Danette C Taylor, DO, MS, FACN; Chief Editor: Selim R Benbadis, MD  more...
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Answer

The largest portion of the facial nerve is composed of efferent fibers that stimulate muscles of facial expression. Suboptimal regeneration of this portion results in paresis of all or some of these facial muscles. This manifests as (1) oral incompetence, (2) epiphora (excessive tearing), and (3) nasal obstruction.


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