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This study addressed the question of the possible functional relevance of two different oscillatory activities, beta and gamma (15-40 and 60-90 Hz, respectively) for perception and memory processes in olfactory areas of mammals. Local field potentials were recorded near relay olfactory bulb neurons while rats performed an olfactory discrimination task.(More)
This study investigated how changes in nutritional motivation modulate odour-related oscillatory activities at several levels of the olfactory pathway in non-trained rats. Local field potential recordings were obtained in freely moving animals in the olfactory bulb (OB), anterior and posterior parts of the piriform cortex (APC and PPC respectively) and(More)
In the mammalian olfactory system, oscillations related to odour representation have been described in field potential activities. Previous results showed that in olfactory bulb (OB) of awake rats engaged in an olfactory learning, odour presentation produced a decrease of oscillations in gamma frequency range (60-90 Hz) associated with a power increase in(More)
The evoked potential recorded in the rat piriform cortex in response to electrical stimulation of the olfactory bulb is composed of an early component occasionally followed by a late component (60-70 ms). We previously showed that the late component occurrence was enhanced following an olfactory learning. In the present study carried out in naive rats, we(More)
This experiment determined the importance of functional coupling between structures of central olfactory pathways: the olfactory bulb (OB), anterior (APC), posterior (PPC) parts of the piriform cortex and lateral entorhinal cortex (EC). From local field potential signals obtained in awake rats, coupling during spontaneous activity was estimated with(More)
The cerebellar cortex is remarkable for its organizational regularity, out of which task-related neural networks should emerge. In Purkinje cells, both complex and simple spike network patterns are evident in sensorimotor behavior. However, task-related patterns of activity in the granule cell layer (GCL) have been less studied. We recorded local field(More)
In the case of disequilibrium, the capacity to step quickly is critical to avoid falling in elderly. This capacity can be simply assessed through the choice stepping reaction time test (CSRT), where elderly fallers (F) take longer to step than elderly non-fallers (NF). However, the reasons why elderly F elongate their stepping time remain unclear. The(More)
In this paper, we review a physiological task that is predominant in preventing humans from falling, but that simultaneously also challenges balance: taking a step. In particular, two variants of this task are presented and compared: the voluntary step versus a step induced by an external and unpredictable perturbation. We show that, while these contribute(More)
L'objet de cette étude est de proposer une version française validée de l'échelle de rumination de colère — Anger Rumination Scale [12]. L'apport principal de cette échelle est de s'intéresser à la nature des contenus cognitifs supports de la rumination liée à l'expérience émotionnelle de colère. La validité factorielle de la version française a été testée(More)
BACKGROUND The aim of this study was to propose a French version of the Anger Rumination Scale (ARS). The main contribution of this scale is to evaluate cognitive responses involved in rumination experience related to anger. The rumination experience is assessed through four scales: angry afterthoughts, thoughts of revenge, angry memories and understanding(More)