Jean-Lionel Bagot

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In order to enhance the effect of spatial frequency on the hemispheric asymmetry of visual evoked potentials (VEP), the response amplitudes to ON-OFF modulated gratings were compared with the responses to pattern reversal stimulation. Sinusoidal gratings of different spatial frequencies were presented to six righthanders. VEPs were recorded from temporal(More)
Recent suggestions on the involvement of the spatial frequency of visual stimuli in the hemispheric lateralization were investigated by recording steady-state evoked potentials in two groups of subjects: five right-handers and five left-handers. Sinusoidal gratings at spatial frequency of 0.5, 1, 3, 4, 6, 8, 10, 12 or 16 cpd were phase reversed at 4 Hz or(More)
BACKGROUND Chemotherapy, hormone therapy, and new targeted therapies for cancer lead to adverse effects which are often difficult to relieve using classical homeopathy. Besides diminishing the quality of life of the patient, they can force the oncologist to reduce or even to cease treatment prematurely, which represents a loss of opportunity for the(More)
Steady-state evoked potentials were recorded in eight adult subjects from occipital and temporal leads of both hemispheres to investigate the effect of temporal frequency on the hemispheric specialization for basic visual information. A 3 cycles deg-1 grating was phase-reversed at different temporal frequencies (from 4 to 18 Hz), and the frequency spectrum(More)
This study presents two distinct effects produced by manipulation of the background illumination on the directional sensitivity to colour- and orientation-carried motion. The two motion percepts were produced with two of a class of stimuli extensively used by the first and last authors in apparent-motion studies. The stimuli were designed to produce motion(More)
A single-eye irradiation of 10 Gy (0.8 Gy. min-1) induces impairments of the electrical responses of the rabbit retina in dark adaptation. These are associated with reversible alteration of the photoreceptors and the preganglionic neurons and a disturbance of all the mechanisms of adaptation. Possible relationships between these functional alterations and(More)
UNLABELLED The olfactory and gustatory stimulations with NaCl (10(-5)-10(-2) M/1) bring about certain typical modifications of the preoptic cells activity in the case of "Parr" and "Parr smolt". The "on" or "off" or "on and off" effects are very marked. Unlike the "Smolt" stage is accompanied by an important decrease of the preoptic cells activity,(More)
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