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Neural ensemble processing of sensorimotor information during behavior was investigated by simultaneously recording up to 48 single neurons at multiple relays of the rat trigeminal somatosensory system. Cortical, thalamic, and brainstem neurons exhibited widespread 7- to 12-hertz synchronous oscillations, which began during attentive immobility and reliably(More)
The postnatal development of direct thalamocortical projections from the zona incerta of the ventral thalamus to the whisker representation area of the rat primary somatosensory cortex was investigated. Cytoarchitectonic analysis based on Nissl staining, cytochrome oxidase histochemistry and immunohistochemistry for glutamic acid decarboxylase, GABA,(More)
Neurons located in the zona incerta (ZI) of the ventral thalamus project to several regions of the central nervous system, including the neocortex, superior colliculus, and brainstem. However, whether these projections are functionally segregated remains unknown. This issue was addressed here by combining neuroanatomical tracers with immunohistochemical(More)
Peripheral sensory deprivation induces reorganization within the somatosensory cortex of adult animals. Although most studies have focused on the somatosensory cortex, changes at subcortical levels (for example the thalamus) could also play a fundamental role in sensory plasticity. To investigate this, we made chronic simultaneous recordings of large(More)
Anti-peptide antibodies that specifically recognize the alpha1 subunit of class A-D voltage-gated Ca2+ channels and a monoclonal antibody (MANC-1) to the alpha2 subunit of L-type Ca2+ channels were used to investigate the distribution of these Ca2+ channel subtypes in neurons and glia in models of brain injury, including kainic acid-induced epilepsy in the(More)
The intermediate filament nestin is highly expressed in multipotential stem cells of the developing central nervous system (CNS). During neuro- and gliogenesis, nestin is replaced by cell type-specific intermediate filaments, e.g. neurofilaments and glial fibrillary acidic protein (GFAP). In this study, we demonstrate that nestin expression is re-induced in(More)
The effects of norepinephrine (NE) and the alpha-1 agonist phenylephrine (PE) on synaptically evoked responses of electrophysiologically identified pyramidal neurons in layer V of rat somatosensory cortex were studied in brain slices using intracellular recording techniques. When added to the bathing medium NE (10 microM) tended to increase the synaptic(More)
Transformation of normal resting astrocytes to reactive astrocytes in the adult brain after injury has been well documented. Using double immunofluorescent labeling methods, we report that astrocytes in both the ischemically damaged and the retrogradely/anterogradely degenerating forebrain nuclei express not only the glial cell markers glial fibrillary(More)
Chronic treatment of gerbils with 1-aminocyclopropanecarboxylic acid (a high affinity, partial agonist at strychnine-insensitive glycine receptors) resulted in a 3-fold increase in survival, a significant improvement in neurological status, and an extensive protection of vulnerable brain regions following severe forebrain ischaemia. A bolus of(More)
1-Aminocyclopropanecarboxylic acid is a high affinity ligand with partial agonist properties at strychnine-insensitive glycine sites associated with the N-methyl-D-aspartate subtype of glutamate receptors. Since occupation of these sites appears required for operation of N-methyl-D-aspartate, receptor coupled cation channels, it was hypothesized that a(More)