%0 Journal Article
%T The First Metacarpal is the Thumb First Phalange: EvoDevo Implications
%A Valenzuela
%A Carlos
%A Y
%A Berr¨ªos-Loyola
%A R
%A Canals
%A M
%J International Journal of Morphology
%D 2009
%I Scientific Electronic Library Online
%R 10.4067/S0717-95022009000400004
%X we examined the status of the first metacarpal bone whose shape, fetal and post-natal development correspond to those of the thumb proximal phalanx. galen already described this, circa 170 ce. our radiographic data confirm that the pre-axial (radial or anterior) side of the hand matures, later than the post-axial (ulnar or posterior) side, both, pre- and post-natally. a new perspective on thumb primate and human ontogeny is discussed and comparative observations on the evolutionary development (evodevo) of the thumb and the first toe are proposed along with a nomenclature honoring galen's original proposition.
%K bone maturity
%K thumb evodevo
%K first metacarpal
%K thumb's first phalanx.
%U http://www.scielo.cl/scielo.php?script=sci_abstract&pid=S0717-95022009000400004&lng=en&nrm=iso&tlng=en