On the incidence of the biceps brachii third head in Brazilian white and blacks.
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.
Santo Neto
H
H
Department of Anatomy, Campinas State University, UNICAMP, Sao Paulo, Brazil.
Camilli
J A
JA
Andrade
J C
JC
Meciano Filho
J
J
Marques
M J
MJ
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*