Article

Prefrontal cortex activation supports the emergence of early stone age toolmaking skill

Details

Citation

Putt SSJ, Wijeakumar S & Spencer JP (2019) Prefrontal cortex activation supports the emergence of early stone age toolmaking skill. NeuroImage, 199, pp. 57-69. https://doi.org/10.1016/j.neuroimage.2019.05.056

Abstract
Trends toward encephalization and technological complexity ∼1.8 million years ago may signify cognitive development in the genus Homo. Using functional near-infrared spectroscopy, we measured relative brain activity of 33 human subjects at three different points as they learned to make replicative Oldowan and Acheulian Early Stone Age tools. Here we show that the more complex early Acheulian industry recruits left dorsolateral prefrontal cortex when skills related to this task are first being learned. Individuals with increased activity in this area are the most proficient at the Acheulian task. The Oldowan task, on the other hand, transitions to automatic processing in less than 4 h of training. Individuals with increased sensorimotor activity demonstrate the most skill at this task. We argue that enhanced working memory abilities received positive selection in response to technological needs during the early Pleistocene, setting Homo on the path to becoming human.

Keywords
Cognitive Neuroscience; Neurology

Journal
NeuroImage: Volume 199

StatusPublished
FundersLeakey FoundationLeakey Foundation, Wenner-Gren FoundationWenner-Gren Foundation, Sigma XiSigma Xi, John Templeton FoundationJohn Templeton Foundation and AAUWAAUW
Publication date01/10/2019
Publication date online22/05/2019
Date accepted by journal21/05/2019
URLhttp://hdl.handle.net/1893/29617
PublisherElsevier BV
ISSN1053-8119