IFIBA   22255
INSTITUTO DE FISICA DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
From a single decision to a multi-step algorithm
Autor/es:
STANISLAS DEHAENE; MARIANO SIGMAN
Revista:
CURRENT OPINION IN NEUROBIOLOGY
Editorial:
CURRENT BIOLOGY LTD
Referencias:
Año: 2012 p. 1 - 9
ISSN:
0959-4388
Resumen:
Humans can perform sequential and recursive computations, as when calculating 23 x 74. However, this comes at a cost: flexible computations are slow and effortful. We argue that this competence involves serial chains of successive decisions, each based on the accumulation of evidence up to a threshold and forwarding the result to the subsequent step. Such serial ?programs? require a specific neurobiological architecture, approximating the operation of a slow serial Turing machine. We review recent progress in understanding how the brain implements such multi-step decisions and briefly examine how they might be realized in models of primate cortex.