EL CONDUCTO AUDITIVO EXTERNO Y EL ANILLO TIMPÁNICO EN PRIMATES HUMANOS Y NO HUMANOS

Abstract

The none human adult primats holds three different types of auditory bulla and ectotympanic (tympanic ring) in the temporal bone: 1) lemuriform type, 2) lorisiform an platyrrhine type, and 3) tarsioid an catarrhine type (Moore 1981).

The infant human primats presents a tympanic ring since three months of gestation as approximately two years of age, which to ossify throughout ontogenetic process, to shape external acoustic duct (CAE), which held the adult human primats in the temporal bone. Bothcharacteristics are very similar to each other.

The paleoprimatologists say that the three characteristic types in the primats are considered as one of the diagnostic features, which determine that order, since they can be recognized and used in order to interpret the fossil series of primats (Fernández Torres 1993).

It is interesting to learn the reason of the similarity and to search some filogenetic relation between the current species of primats and pattern infant-human.