Details

Autor(en) / Beteiligte

• Beaudet, Amélie

Titel

The Emergence of Language in the Hominin Lineage: Perspectives from Fossil Endocasts

Ist Teil von

• Frontiers in human neuroscience, 2017-08, Vol.11, p.427-427

Ort / Verlag

Switzerland: Frontiers Research Foundation

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• [...]besides being largely questioned in the extant primate taxa (rev. in Bruner, 2017b), recent reinvestigation of the fossil record has revealed a more complex history of the reorganization of the frontal lobes, and more particularly of the inferior frontal gyrus and Broca's cap, deeply rooted in the early representatives of the hominin lineage. In terms of structural organization, the identification of two differential patterns in the extant ape and human frontal lobes, characterized, respectively, by the presence of the fronto-orbital sulcus and of the horizontal and ascending branches of the lateral fissure, was previously considered as an effective trait for identifying the derived condition of the Broca's cap in the fossil record (rev. in Falk, 2014). Imaging techniques and 3D modeling of the virtual endocast supported the assumption of the presence of frontal asymmetries in non-human fossil hominins by mapping shape asymmetries (Braga and Thackeray, 2007; Beaudet et al., 2014). [...]landmark-based analyses of the asymmetries of the third frontal convolution in fossil and extant hominids demonstrated a gradual increase in the degree of expression of asymmetries in the human lineage and emphasize the need of not only describing the occurrence but also quantifying the “magnitude” of endocranial asymmetries (Balzeau et al., 2014). [...]we might predict that fresh evidence will certainly emerge from the systematic reinvestigation of the fossil record with the assistance of imaging techniques and 3D modeling methods.