title: On the incidence of the biceps brachii third head in Brazilian white and blacks.
abstract: The incidence of a third head of the biceps brachii muscle has been reported in several articles, and there is a general idea that it is a race-dependent variation. The aim of this investigation was to study the biceps brachii muscle with regard to the incidence of its third head in a mixed white and black Brazilian population. A total of 200 upper arms from adult white and black cadavers (100 whites and 100 blacks) fixed in a 10% formol solution were examined and compared. It was observed that for white subjects the incidence of the third head was 20% against 9% for the black subjects: a statistically significant difference. We suggest that other factors, in addition to racial ones, might play a part in determining the incidence of the biceps brachii third head in a population.
authors.affiliation: Department of Anatomy, Campinas State University, UNICAMP, Sao Paulo, Brazil.
authors.forename: H
authors.initials: H
authors.lastname: Santo Neto
authors.forename: J A
authors.initials: JA
authors.lastname: Camilli
authors.forename: J C
authors.initials: JC
authors.lastname: Andrade
authors.forename: J
authors.initials: J
authors.lastname: Meciano Filho
authors.forename: M J
authors.initials: MJ
authors.lastname: Marques
mesh_terms: D000328:Adult; D001132:Arm / Q000033:anatomy & histology; D044383:Black People / Q000235:genetics*; D001938:Brazil; D006801:Humans; D018482:Muscle, Skeletal / Q000033:anatomy & histology*; D044465:White People / Q000235:genetics*