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At the beginning of the 20th century, German biologist Jakob von Uexkull created the concept of "Umwelt" to denote the environment as experienced by a subject. This concept of environment differs from the idea of passive surroundings and is defined not just by physical surroundings, but is rather a "subjective universe," a space weighted with meaning. Today, neuroscience provides a new way to look at the brain s capability to create a representation of the world. At the same time behavioural specialists are demonstrating that animals have a richer mental universe than previously known....

Groping around a familiar room in the dark, or learning to read again after a traumatic brain injury; navigating a virtual landscape through an avatar, or envisioning a scene through the eyes of a character--all of these are expressions of one fundamental property of life, Alain Berthoz argues. They are instances of vicariance, when the brain sidesteps an impasse by substituting one process or function for another. In The Vicarious Brain, Creator of Worlds, Berthoz shows that this capacity is the foundation of the human ability to think creatively and function in a complex...

At the beginning of the 20th century, German biologist Jakob von Uexkull created the concept of "Umwelt" to denote the environment as experienced by a subject. This concept of environment differs from the idea of passive surroundings and is defined not just by physical surroundings, but is rather a "subjective universe," a space weighted with meaning. Today, neuroscience provides a new way to look at the brain s capability to create a representation of the world. At the same time behavioural specialists are demonstrating that animals have a richer mental universe than previously known....

The neuroscientist Alain Berthoz experimented on Russian astronauts in space to answer these questions: How does weightlessness affect motion? How are motion and three-dimensional space perceived? In this erudite and witty book, Berthoz describes how human beings on earth perceive and control bodily movement. Reviewing a wealth of research in neurophysiology and experimental psychology, he argues for a rethinking of the traditional separation between action and perception, and for the division of perception into five senses.

In Berthoz's view, perception and cognition are inherently...