Search results for "MATURATION"
showing 2 items of 102 documents
Flash visual evoked potentials: maturation from birth to 15 years of age
2011
Flash visual evoked potentials: maturation from birth to 15 years of age. annual meeting of the association-for-research-in-vision-and-ophthalmology (ARVO)
Tooth replacement rates in early chondrichthyans: a qualitative approach
2009
The continuous replacement of teeth throughout their lifetime is a common characteristic of most chondrichthyans. This process was already present in the earliest representatives of the group. It has been well established that different species of extant sharks show rapid tooth replacement rates; however, some authors have suggested that in early chondrichthyans this rate might have been much slower. Here we present a qualitative approach to analyse tooth replacement rates in the Early Devonian shark Leonodus carlsi, the earliest tooth-bearing shark known to date. For this, we have examined 1,103 isolated teeth from Celtiberia, Spain. Our study provides strong evidences of an extremely slow…