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Acta Cirurgica Brasileira

versão On-line ISSN 1678-2674

Resumo

COSTA, Heloisa Juliana Zabeu Rossi et al. Quantitative histological analysis of the mandibular branch of the facial nerve in rats. Acta Cir. Bras. [online]. 2012, vol.27, n.11, pp.747-750. ISSN 1678-2674.  http://dx.doi.org/10.1590/S0102-86502012001100001.

PURPOSE: To establish a model to quantitative histological analysis of the mandibular branch of the facial nerve in rats. METHODS: Eleven Wistar rats had their right and left mandibular branches of the facial nerve surgically removed and were sacrificed afterwards. Quantitative histological analysis was performed with: a) partial number of axons; b) partial area of the transversal cut of the nerve (9000μm2); c) partial density. The averages of partial density were obtained. The statistical study was established by Wilcoxon test (p=0.05). RESULTS: In relation to density of axons, comparison between sides shows no statistically significant difference (p=0.248; p=0.533). Mean partial density of distal and proximal samples was, respectively, 0.18 ± 0.02 and 0.19 ± 0.02 axons/μm2.  Comparison between proximal and distal samples shows no statistically significant difference (p=0.859; p=0.182). CONCLUSION: This study has successfully established a model to histological quantitative analysis of the mandibular branch of the facial nerve in rats.

Palavras-chave : Facial Nerve; Histology; Rats.

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