Capítulos de libros

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Browsing Capítulos de libros by Author "Aboitiz, Francisco"

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    Attending to the Stream of Consciousness: a Methodological Challenge
    (Springer-Verlag, 2009) Cosmelli, Diego; Aboitiz, Francisco; Cosmelli, Diego
    Attention is usually conceptualized, and empirically approached, as a matter of selection, information reduction, and performance enhancement. In this context, a wealth of experimental approaches have been developed to study sustained attention, selective attention, orienting, divided attention, conflict resolution, and so on. However, much less importance has been traditionally accorded to a more intimate yet pervasive aspect of attention: how it continuously shifts and moves within the stream of consciousness — the ongoing flow of perceptions, thoughts, images, and feelings we all experience during any normal day. In this chapter we survey some of the traditional ways in which attention is experimentally studied while pointing out some limitations and potential interests these approaches have for the study of attention in the stream of consciousness. We highlight, based on a phenomenological approach to its dynamics, one crucial aspect of attention that has been systematically neglected, and that could have important consequences for its study. Taking into account the spontaneous nature of attentional shifts during the stream of consciousness leads us to consider recent developments in brain imaging, experimental psychology, and signal analysis that are beginning to establish a framework for the scientific study of this elusive phenomenon.
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    Chapter 13 : Origin and evolution of human speech : emergence from a trimodal auditory, visual and vocal network
    (2019) Michon Desbiey, Maëva; López Hernández, Vladimir; Aboitiz, Francisco
    In recent years, there have been important additions to the classical model of speech processing as originally depicted by the Broca–Wernicke model consisting of an anterior, productive region and a posterior, perceptive region, both connected via the arcuate fasciculus. The modern view implies a separation into a dorsal and a ventral pathway conveying different kinds of linguistic information, which parallels the organization of the visual system. Furthermore, this organization is highly conserved in evolution and can be seen as the neural scaffolding from which the speech networks originated. In this chapter we emphasize that the speech networks are embedded in a multimodal system encompassing audio-vocal and visuo-vocal connections, which can be referred to an ancestral audio-visuo-motor pathway present in nonhuman primates. Likewise, we propose a trimodal repertoire for speech processing and acquisition involving auditory, visual and motor representations of the basic elements of speech: phoneme, observation of mouth movements, and articulatory processes. Finally, we discuss this proposal in the context of a scenario for early speech acquisition in infants and in human evolution.
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    Dynamics of a neuromodulator: I. The role of dopaminergic signaling in goal-directed behavior
    (Springer-Verlag, 2009) Aboitiz, Francisco; Aboitiz, Francisco; Cosmelli, Diego