Browsing by Author "SOTOMOYANO, R"
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- ItemEARLY MALNUTRITION AND CHANGES IN THE INDUCED RELEASE OF NORADRENALINE IN THE PREFRONTAL CORTEX OF ADULT-RATS(1987) SOTOMOYANO, R; HERNANDEZ, A; PEREZ, H; RUIZ, S; DIAZVELIZ, G; BELMAR, J
- ItemEFFECT OF CLONIDINE EARLY IN LIFE ON BRAIN MORPHOFUNCTIONAL DEFICITS INDUCED BY NEONATAL MALNUTRITION IN THE RAT(1989) SOTOMOYANO, R; HERNANDEZ, A; PEREZ, H; RUIZ, S; GALLEGUILLOS, X; BELMAR, J
- ItemFUNCTIONAL ALTERATIONS INDUCED BY PRENATAL MALNUTRITION IN CALLOSAL CONNECTIONS AND INTERHEMISPHERIC ASYMMETRY AS REVEALED BY TRANSCALLOSAL AND VISUAL EVOKED-RESPONSES IN THE RAT(1993) SOTOMOYANO, R; HERNANDEZ, A; PEREZ, H; RUIZ, S; CARRENO, P; BELMAR, J
- ItemYOHIMBINE EARLY IN LIFE ALTERS FUNCTIONAL-PROPERTIES OF INTERHEMISPHERIC CONNECTIONS OF RAT VISUAL-CORTEX(1991) SOTOMOYANO, R; HERNANDEZ, A; PEREZ, H; RUIZ, S; GALLEGUILLOS, X; BELMAR, JIt has been shown that noradrenaline (NA) is an important regulator of normal regressive processes occurring during synaptogenesis such as cell death, axonal pruning and synaptic elimination. The present study was designed to investigate whether enhanced NA release induced by chronic yohimbine administration early in life may alter in the rat the normal pattern of functional interhemispheric connections of the visual cortex. Yohimbine administration to rats between days 5 and 16 of postnatal life (2.5 mg/kg, IP, daily) resulted in changes in the pattern of transcallosal responses evoked in the visual cortex, characterized by a reduction in the peak-to-peak amplitude as well as a reduction of the extent of projecting fields of maximal activity, when examined at 30-35 days following termination of the drug treatment regimen. The results indicate that yohimbine treatment early in life induces functional alterations in the interhemispheric connectivity of the visual areas, probably by disrupting the normal trophic role of NA during synaptogenesis.