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• W1990753743 abstract "In adult rats and mice, ipsilateral projections to SI posteromedial barrel subfield (PMBSF) are demonstrated for mystacial vibrissae (sinus hairs). Mechanical stimulation, with angular deflections in the 2–5° range, elicits potentials in limited areas of SI whose geometric centers coincide for two homologous (contra- and ipsilateral) vibrissae. The cortical domains for two adjacent vibrissae ovelap one another slightly. Phase reversal of potentials and unit discharges are also present within the cortex. Ablation of the SI area contralateral to the SI area under study completely abolishes the ipsilatearally projected potentials. It is proposed that ipsilateral responses are mediated via the corpus callosum with an extra delay of 4–5 msec, thus giving each hemisphere the opportunity to compare vibrissal information originating from the two mystacial pads. Chez des rats et des souris adultes, on démontre l'existence de projections ipsilatérales en provenance des vibrisses mystaciales sur le cortex SI. Ces projections se font sur le champ postéro-médian de SI caractérisé par des structures spéciales de la couche IV (appelées ‘barils’). Des stimulations mécaniques de 2–5° d'angle des vibrisses provoquent des potentiels évoqués sur des aires limitées (quelques centaines de microns) de ce champ. Les centres géométriques de ces aires coïncident pour deux vibrisses mystaciales homologues (contra- et ipsilatérales). Les aires de projection de deux vibrisses adjacentes se recouvrent réciproquement sur leurs frontières. Le renversement de phase des potentiels dans l'épaisseur du cortex et des décharges unitaires sont aussi observés. L'ablation de l'aire SI contralatérale au cortex SI étudié complétement les potentiels ipsilatéraux. Il est conclu que les réponses du cortex à la stimulation des vibrisses ipsilatérales passent par le corps calleux, doù une latence supplémentaire de 4–5 msec. Ainsi chacun des hémisphères aurait la possibilité d'opérer une comparaison des informations en provenance des vibrisses de chaune des deux régions mystaciales." @default.
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• W1990753743 date "1979-06-01" @default.
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• W1990753743 title "Projections on the cortical somatic I barrel subfield from ipsilateral vibrissae in adult rodents" @default.
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• W1990753743 doi "https://doi.org/10.1016/0013-4694(79)90111-1" @default.
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