Clinical article
The facial nerve function coefficient: Analysis of 100 normal subjects

https://doi.org/10.1016/0278-2391(92)90392-DGet rights and content

Abstract

The Facial Nerve Function Index (FNFI) is a measure of asymmetrical facial movement and is a quick and easy method of monitoring the improvement of function in patients with facial nerve palsy. However, purely as a consequence of the way the index is formulated, and not primarily because of any tendency to biological asymmetry favoring one particular direction in the population, the FNFI has a highly skewed distribution. To remove the inherent asymmetry of the index, a modified index, the Facial Nerve Function Coefficient (FNFC), for which a symmetrical distribution is obtained, is proposed. A reference range for this index was derived.

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Senior Registrar, Department of Oral and Maxillofacial Surgery.

Research Technician, Department of Oral Surgery.

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