Although geometric morphometrics is currently the most promising method to analyze endocasts, there are alternatives. Durrleman and colleagues propose an approach based on deformations between surfaces. This method can help with non-linearity of the ontogenetic processes, lack of morphological references, or continuity of the anatomical tissues. The approach is definitely more complex and less intuitive than geometric morphometrics. This may mean sometimes more analytical power, sometimes more analytical bias. The case-study is the endocranial ontogeny in chimps and bonobos: some shared patterns, but interesting differences too.
Posts Tagged 'primate brain'
Tags: chimpanzee, endocranial ontogeny, Pan paniscus, Pan troglodytes, primate brain, shape analysis
Tags: chimpanzee, hemispheric asymmetries, macaque, primate brain, sulci
Stephanie Bogart and colleagues have published an interesting study on sulci asymmetries in chimps and macaques, on NeuroImage. Quantifying cortical depth and surface area, they found consistent population-level brain asymmetries in chimpanzees but not in macaques. The paper is a good review on many issues related to brain asymmetries and evolution in primates. Asymmetries that, however, are the results of mechanisms and processes which are still poorly known.
There is a special issue of Progress in Brain Research entitled “Evolution of the Primate Brain”, edited by Hofman and Falk. There are papers by Sherwood, De Sousa, Zollikofer, Schoenemann, Kaas, Cherniak, Buxhoeveden, and many others. Topics include hominin brain evolution, encephalization, cranial ontogeny, brain and language, intelligence, neural wiring, histology, prefrontal cortex, cerebellum, insula, lateralization, genetics, and much more. Have a look:
Evolution of the Primate Brain
Progress in Brain Research 195: 2-478 (2012)