title: Prevalence of Galen's anastomosis: an anatomical and comparative study.
abstract: An anatomical study of 50 fresh adult human cadavers was performed in order to verify prevalence of Galen's anastomosis (GA) and to evaluate whether factors such as gender, ethnicity, side of the neck, and individual stature may interfere with GA prevalence. The results were analysed using the Chi-square test, Student t-test, and F-Snedecor test. GA was observed in 87 of 100 dissections. There was no statistically significant difference regarding GA prevalence between groups separated by ethnicity (p = 0.853), gender (p = 0.198), side of the neck (p = 0.766), or individual height (p = 0.199). Therefore, the GA was a frequent anatomical finding, and this result was not influenced by any studied factor. Comparing our data with previous studies, we also concluded that the GA seems to play an important role in the innervation of the larynx, even though its function remains unclear. Also, it is reasonable to consider GA a constant anatomical constituent.
authors.affiliation: Department of Surgery, Clinical Hospital of the Faculty of Medicine, University of São Paulo, São Paulo, Brazil. juliofurlan@idirect.com
authors.forename: Julio C
authors.initials: JC
authors.lastname: Furlan
authors.forename: Lenine G
authors.initials: LG
authors.lastname: Brandão
authors.forename: Alberto R
authors.initials: AR
authors.lastname: Ferraz
mesh_terms: D001827:Body Height; D005006:Ethnicity; D005260:Female; D006801:Humans; D007823:Laryngeal Nerves / Q000033:anatomy & histology*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012009:Recurrent Laryngeal Nerve / Q000033:anatomy & histology; D012737:Sex Factors