The Parallel Brain: The Cognitive Neuroscience of the Corpus by Eran Zaidel, Marco Iacoboni

By Eran Zaidel, Marco Iacoboni

Hemispheric specialization is enthusiastic about each element of sensory, cognitive, and motor platforms integration. learn of the corpus callosum, the bands of tissue uniting the brain's hemispheres, is critical to figuring out neuroanatomy, neurophysiology, and behaviour. It additionally brings the instruments of hemispheric specialization to a primary challenge of cognitive neuroscience: modularity and intermodular communication.This ebook summarizes present learn at the human corpus callosum. It additionally presents a finished creation to cognitive neuroscience. instead of viewing the sphere during the quite a few structures of the mind/brain corresponding to belief, motion, emotion, reminiscence, language, and challenge fixing, it takes a case reports strategy. concentrating on the significant challenge of straightforward response time, it examines the main simple attainable series of perception-decision-action. the duty is to press a button with one hand once a patch of sunshine is detected within the peripheral field of regard. while the patch seems within the field of regard contrary the responding hand, there needs to be interhemispheric move sooner than reaction. yet move of what--a visible enter code? A cognitive choice code? A motor reaction code? Combining animal versions, basic human stories, and medical facts, the authors observe anatomical, physiological, and behavioral views to this query. The rising view is that the corpus callosum involves many parallel interhemispheric channels for verbal exchange and regulate, and that each move channel is context-dependent and modulated by means of awareness.

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Innocenti, G. , D. Aggoun-Zouaoui, and P. Lehmann, 1995. Cellular aspects of callosal connections and their development. Neuropsychologia 33:961–987. Innocenti, G. , and P. Berbel, 1991. Analysis of an experimental cortical network: II. Connections of visual areas 17 and 18 after neonatal injections of ibotenic acid. J. Neural Transplant. Plast. 2:29–54. Innocenti, G. , and L. Fiore, 1976. Morphological correlates of visual field transformation in the corpus callosum. Neurosci. Lett. 4:245–252. Innocenti, G.

These results brought evidence compatible with the view that competition with other corticocortical a¤erents might regulate the selection of callosal connections. Nevertheless, a reorganization of the thalamocortical connections as a cause could not be excluded. The formation of callosal connections after experimental manipulations that a¤ect hemispheric symmetry might provide tools for understanding the development of interhemispheric interactions in lateralized brains such as the human (Rosen, Sherman, and Gallaburda, 1989).

Wiesel, 1989. Columnar specificity of intrinsic horizontal and corticocortical connections in cat visual cortex. J. Neurosci. 9:2432–2442. Halloran, M. , and K. Kalil, 1994. Dynamic behaviors of growth cones extending in the corpus callosum of living cortical brain slices observed with video microscopy. J. Neurosci. 14:2161–2177. , C. Milleret, and G. Innocenti, 1994. Morphology of callosal axons interconnecting areas 17 and 18 of the cat. Eur. J. Neurosci. 6:898–917. Hubel, D. , and T. N. Wiesel, 1967.

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