Visual perception during movements of the eyes and head

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Visual perception is an integral part of conscious experience, and so it is not surprising that nearly half the human brain is devoted to the processing of visual images. Equally important for accurate visual perception is the ability to move the eyes, head, and body. Such movements allow us to explore our surroundings thoroughly, but they also introduce abrupt changes in the incoming visual images. Nevertheless, our perception of the visual world is quite stable, indicating that the visual processing centres of the brain contain mechanisms that compensate for such disturbances. Understanding how the brain accomplishes this feat is one of the most important questions in neuroscience, as it bears on the more general question of how the brain uses feedback from its own motor commands to achieve accurate and stable sensory processing. Indeed the issue of feedback motor control is of general interest in a number of domains, ranging from robotics to the design of human-machine interfaces.