This book discusses evolution of the human brain, the origin of speech and language. It covers past and present perspectives on the contentious issue of the acquisition of the language capacity. Divided into two parts, this insightful work covers several characteristics of the human brain including the language-specific network, the size of the human brain, its lateralization of functions and interhemispheric integration, in particular the phonological loop. Aboitiz argues that it is the phonological loop that allowed us to increase our vocal memory capacity and to generate a shared semantic space that gave rise to modern language. The second part examines the neuroanatomy of the monkey brain, vocal learning birds like parrots, emergent evidence of vocal learning capacities in mammals, mirror neurons, and the ecological and social context in which speech evolved in our early ancestors. This book's interdisciplinary topic will appeal to scholars of psychology, neuroscience, linguistics, biology and history.

Attention is a key psychological construct in the understanding of human cognition, and the target of enormous efforts to elucidate its physiological mechanisms, as the wealth of literature-both primary and secondary-attests (for recent compilations see Itti, Rees, & Tsotsos, 2005; Paletta & Rome, 2008; Posner, 2004). But in addition to asking what attention actually is, decomposing and analyzing its varieties, or delimiting its neurobiological mechanisms and effects, in this volume we want to explore attention somewhat differently. We believe that a full-fledged theory of attention must consider its workings in the context of motivated, goal-directed, and environmentally constrained organisms. That attention is related to goal-directed behavior is not news. What the contri- tions to this volume do suggest, however, is the existence of fundamental links between attention and two key processes that are crucial for adapted conduct: go- directed behavior and cognitive control. Importantly, they show that these relations can be explored at multiple levels, including neurodynamical, neurochemical, evo- tionary, and clinical aspects, and that in doing so multiple methodological challenges arise that are worth considering and pursuing. The reader will find here, therefore, a selection of contributions that range from basic mechanisms of attention at the n- ronal level to developmental aspects of cognitive control and its impairments. Another trend that will become evident is that, in different ways, the authors stress the need to understand these issues as they unfold in natural behavior (both healthy and pathological), thus arguing for a more ecological approach to these questions.

Attention is a key psychological construct in the understanding of human cognition, and the target of enormous efforts to elucidate its physiological mechanisms, as the wealth of literature-both primary and secondary-attests (for recent compilations see Itti, Rees, & Tsotsos, 2005; Paletta & Rome, 2008; Posner, 2004). But in addition to asking what attention actually is, decomposing and analyzing its varieties, or delimiting its neurobiological mechanisms and effects, in this volume we want to explore attention somewhat differently. We believe that a full-fledged theory of attention must consider its workings in the context of motivated, goal-directed, and environmentally constrained organisms. That attention is related to goal-directed behavior is not news. What the contri- tions to this volume do suggest, however, is the existence of fundamental links between attention and two key processes that are crucial for adapted conduct: go- directed behavior and cognitive control. Importantly, they show that these relations can be explored at multiple levels, including neurodynamical, neurochemical, evo- tionary, and clinical aspects, and that in doing so multiple methodological challenges arise that are worth considering and pursuing. The reader will find here, therefore, a selection of contributions that range from basic mechanisms of attention at the n- ronal level to developmental aspects of cognitive control and its impairments. Another trend that will become evident is that, in different ways, the authors stress the need to understand these issues as they unfold in natural behavior (both healthy and pathological), thus arguing for a more ecological approach to these questions.

There is little doubt that the vertebrate brain is the most complex structure we know. As with any complex structure, there is the immediate question about its origins. How could such a complex design develop from the simplest multicellular animals? This problem has pervaded the study of evolutionary biology since its beginnings. Although Darwin (1859, 1871) proposed an impecable mechanism (natural selection) for the gradual transformation of species including human origins, even he sometimes expressed certain doubts about the origin of highly complex structures. This issue has been highly debated both within science and outside it.

The authors follow an approach that has been termed "developmental evolutionary genetics," which seeks to establish a correspondence between embryological processes and the phylogenetic history of an organism. Modern understanding of these hypotheses acknowledges that in fact, early embryos are readily distinguishable among them, and that human embryos are human embryos during all development; they do not pass from a jellyfish stage to a fish stage and so on (Garstang 1922; Gould 1977; Richardson et al. 1997). However, it is also recognized that embryos pass through successive stages in which they acquire the characters proper to each of the nested phylogenetic categories to which they belong. Thus, there is a general concordance between embryonic stages and the phylogenetic history.