منابع مشابه
Short intracortical and surround inhibition are selectively reduced during movement initiation in focal hand dystonia.
In patients with focal hand dystonia (FHD), pathological overflow activation occurs in muscles not involved in the movement. Surround inhibition is a neural mechanism that can sharpen desired movement by inhibiting unwanted movement in adjacent muscles. To further establish the phenomenon of surround inhibition and to determine whether short intracortical inhibition (SICI) reflecting inhibition...
متن کاملCenter-Surround Inhibition in Working Memory
Directing visual attention toward a particular feature or location in the environment suppresses processing of nearby stimuli [1-4]. Echoing the center-surround organization of retinal ganglion cell receptive fields [5], and biasing of competitive local neuronal dynamics in favor of task-relevant stimuli [6], this "inhibitory surround" attention mechanism accentuates the demarcation between tas...
متن کاملSurround inhibition in the human motor system
.................................................................................................................... 3 ACKNOWLEDGEMENTS ........................................................................................... 4 STATEMENT OF PARTICIPATION IN STUDIES DESCRIBED .......................... 5 TABLE OF CONTENTS ...........................................................................
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BACKGROUND Detection of visual contours (strings of small oriented elements) is markedly poor in schizophrenia. This has previously been attributed to an inability to group local information across space into a global percept. Here, we show that this failure actually originates from a combination of poor encoding of local orientation and abnormal processing of visual context. METHODS We measu...
متن کاملContour detection operators based on surround inhibition
We propose a biologically motivated computational step, called non-classical receptive field (non-CRF) inhibition, to improve contour detection in images of natural scenes. We augment a Gabor energy operator with non-CRF inhibition. The resulting contour operator responds strongly to isolated lines, edges, and contours but exhibits a weaker or no response to edges that make part of texture. As ...
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ژورنال
عنوان ژورنال: Experimental Brain Research
سال: 2012
ISSN: 0014-4819,1432-1106
DOI: 10.1007/s00221-012-3102-z