Assessing corollary discharge in humans using noninvasive neurophysiological methods
نویسندگان
چکیده
منابع مشابه
Visual perception and corollary discharge.
Perception depends not only on sensory input but also on the state of the brain receiving that input. A classic example is perception of a stable visual world in spite of the saccadic eye movements that shift the images on the retina. A long-standing hypothesis is that the brain compensates for the disruption of visual input by using advance knowledge of the impending saccade, an internally gen...
متن کاملCorollary discharge circuits in the primate brain.
Movements are necessary to engage the world, but every movement results in sensorimotor ambiguity. Self-movements cause changes to sensory inflow as well as changes in the positions of objects relative to motor effectors (eyes and limbs). Hence the brain needs to monitor self-movements, and one way this is accomplished is by routing copies of movement commands to appropriate structures. These s...
متن کاملRole of corollary discharge in space constancy.
Visual fixation can be maintained in spite of finger pressure on the monocularly viewing eye. We measured the amount of extraocular muscle effort required to counter the eyepress as the secondary deviation of the occluded fellow eye. Using this method, without drugs or neurolog ical lesions, we have shown that corollary discharge (CD) governs perception of position of a luminous point in darkn...
متن کاملDisrupted Saccadic Corollary Discharge in Schizophrenia.
UNLABELLED Disruptions in corollary discharge (CD), motor signals that send information to sensory areas and allow for prediction of sensory states, are argued to underlie the perceived loss of agency in schizophrenia. Behavioral and neurophysiological evidence for CD in primates comes largely from the saccadic double-step task, which requires participants to make two visually triggered saccadi...
متن کاملThe cellular basis of a corollary discharge.
How do animals discriminate self-generated from external stimuli during behavior and prevent desensitization of their sensory pathways? A fundamental concept in neuroscience states that neural signals, termed corollary discharges or efference copies, are forwarded from motor to sensory areas. Neurons mediating these signals have proved difficult to identify. We show that a single, multisegmenta...
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ژورنال
عنوان ژورنال: Nature Protocols
سال: 2010
ISSN: 1754-2189,1750-2799
DOI: 10.1038/nprot.2010.67