Neural reuse in the evolution and development of the brain: evidence for developmental homology?
This article lays out some of the empirical evidence for the importance of neural reuse-the reuse of existing (inherited and/or early developing) neural circuitry for multiple behavioral purposes-in defining the overall functional structure of the brain. We then discuss in some detail one particular instance of such reuse: the involvement of a local neural circuit in finger awareness, number representation, and other diverse functions. Finally, we consider whether and how the notion of a developmental homology can help us understand the relationships between the cognitive functions that develop out of shared neural supports.
Department of Psychology, Franklin & Marshall College, P.O. Box 3003, Lancaster, PA 17604-3003, USA. michael.anderson@fandm.edu
Michael L
ML
Anderson
Marcie
M
Penner-Wilger
D005075:Biological Evolution; D001921:Brain / Q000502:physiology*; D003071:Cognition / Q000502:physiology*; D006801:Humans; D008959:Models, Neurological; D009415:Nerve Net / Q000502:physiology; D009473:Neuronal Plasticity / Q000502:physiology*