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The whisker representations in the somatosensory barrel cortex of mice are modulated by sensory inputs associated with animal motor behavior which shows circadian rhythmicity. In a C57/BL mouse strain kept under a light/dark (LD 12:12) regime, we observed daily structural changes in the barrel cortex, correlated with the locomotor activity level. Stereological analysis of serial electron microscopic...
Mice show circadian rhythms in behaviour and metabolic processes but also in neuronal plasticity associated with the sensory input to the whisker representations in the somatosensory (barrel) cortex. We analyzed daily structural changes in the barrel cortex of the C57/BL mice in a light/dark (LD 12:12) regime and in constant darkness (DD). Using serial EM sections of the barrel cortex of mice sacrificed...
Investigations on the effects of the 5-HT agonists and antagonists on the phase of the circadian locomotor activity rhythm of animals kept in constant light conditions (LL) are rare. Therefore the influence of R-(+)-OH-DPAT (5-HT1A receptors agonist) and metergoline (5-HT1/2/7 receptors antagonist) on the phase shift of the locomotor-activity rhythm alone and when combined with dark pulses in mice...
The study employed electrical lesions of dorsal raphe nucleus (DRN) to determine the functional significance of those nuclei in the regulation of wheel-running activity rhythm in mice in light/dark (LD 12:12), constant light (LL), and constant dark (DD) conditions. The wheel-running records showed that raphe nucleus lesions resulted in few days? decrease in common activity and amplitude in LD. The...
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