Spatial Frequency-Dependent Asymmetry of Visual Evoked Potential Amplitudes
| العنوان: | Spatial Frequency-Dependent Asymmetry of Visual Evoked Potential Amplitudes |
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| المؤلفون: | Karl Van Orden, John F. House |
| المصدر: | Perceptual and Motor Skills. 82:1011-1018 |
| بيانات النشر: | SAGE Publications, 1996. |
| سنة النشر: | 1996 |
| مصطلحات موضوعية: | Adult, Male, Adolescent, genetic structures, media_common.quotation_subject, Experimental and Cognitive Psychology, Stimulus (physiology), Asymmetry, Sinusoidal grating, Nuclear magnetic resonance, Reference Values, Orientation, medicine, Humans, Attention, Evoked potential, Dominance, Cerebral, media_common, Cerebral Cortex, Communication, business.industry, Middle Aged, Sensory Systems, Visual cortex, medicine.anatomical_structure, Amplitude, Pattern Recognition, Visual, Scalp, Evoked Potentials, Visual, Spatial frequency, business, Psychology |
| الوصف: | The extent to which pattern reversal evoked potential amplitudes are distributed symmetrically over the scalp was investigated as a function of stimulus spatial frequency. Nine right-handed male subjects viewed sinusoidal grating stimuli of 4.0 and 0.5 c/deg phase reversed every 900 msec. A visual half-field configuration enabled selective stimulation of the right- or left-hemisphere visual cortex. Evoked responses were recorded from the 2 cm above the inion (Oz) and at 7 and 13 cm lateral to Oz. Analyses of normalized evoked response amplitudes showed a significant asymmetry for the 4.0 c/deg stimulus; right-hemisphere amplitudes declined as a function of distance from the midline, while left-hemisphere amplitudes were greatest at the 7 cm recording site. No hemispheric differences were observed for the 0.5 c/deg stimulus; amplitudes for both hemispheres declined as a function of distance from the midline. The data are discussed in terms of hemispheric differences in morphology and functional asymmetries at early levels of sensory processing. |
| تدمد: | 1558-688X 0031-5125 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffb1dfb88e844c4e07025775825aeffc https://doi.org/10.2466/pms.1996.82.3.1011 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....ffb1dfb88e844c4e07025775825aeffc |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1558688X 00315125 |
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