Interhemispheric transfer of visual information in humans: spatial characteristics.
نویسندگان
چکیده
منابع مشابه
Mechanisms of interhemispheric transfer of visual information in rats.
Pattern discrimination learning in functionally hemidecorticate rats leads to formation of memory traces in the intact hemisphere. The interhemispheric transfer (IHT) of such lateralized engrams is more efficient when the untrained eye rather than the trained eye is used during interdepression training (10 trials) preceding the retention test with the contralateral hemisphere, probably because ...
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The goal of this study was to cast light on the existence of functional callosal channels for the interhemispheric transfer (IHT) of spatial and semantic information. To do so, we recorded event-related potentials in healthy humans while performing a primed odd-even discrimination task. Targets were visually presented numbers preceded by single-letter primes signaling the probable presentation ...
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We analyzed the coherence of electroencephalographic (EEG) signals recorded symmetrically from the two hemispheres, while subjects (n = 9) were viewing visual stimuli. Considering the many common features of the callosal connectivity in mammals, we expected that, as in our animal studies, interhemispheric coherence (ICoh) would increase only with bilateral iso-oriented gratings located close to...
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Normal human subjects underwent functional magnetic resonance imaging (fMRI) while performing a simple visual manual reaction-time (RT) task with lateralized brief stimuli, the so-called Poffenberger's paradigm. This paradigm was employed to measure interhemispheric transmission (IT) time by subtracting mean RT for the uncrossed hemifield-hand conditions, that is, those conditions not requiring...
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The interhemispheric transfer of information is a fundamental process in the human brain. When a visual stimulus appears eccentrically in one visual-hemifield, it will first activate the contralateral hemisphere but also the ipsilateral one with a slight delay due to the interhemispheric transfer. This interhemispheric transfer of visual information is believed to be faster from the right to th...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1987
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1987.sp016474