We used in vivo microdialysis to investigate the effects of local perfusion with the AChE inhibitor neostigmine on the basal and haloperidol evoked increase in dialysate dopamine levels in the dorsolateral and fundus striata of the bilaterally implanted halothane anaesthetized rat. In the absence of neostigmine basal dopamine was consistently higher in the dorsolateral striatum compared with th...

Voluntary behaviour in mammals requires the integration of information from different parts of the cerebral cortex, notably the limbic, associative and sensorimotor areas, in a neural network that eventually controls the muscles. One region of the brain that has been proposed to subserve such a function are the basal ganglia which receive inputs from all cortical areas. Although information fro...

Ampicillin, a beta-lactam antibiotic, has been reported to induce astrocytic glutamate transporter-1 which plays a crucial role in protecting neurons against glutamate excitotoxicity. We investigated the effect of ampicillin on neuronal damage in the mouse hippocampus and neostriatum following transient global forebrain ischemia. Male C57BL/6 mice were anesthetized with halothane and subjected ...

Dendritic spines of rat neostriatal neurons were examined by light microscopy and high voltage stereo electron microscopy (HVEM) following selective staining by intracellular microinjection of horseradish peroxidase. Conventionally prepared material also was used for quantitative analysis of dendritic spines from serial thin sections of neostriatum. Stereo electron microscopy of semithin sectio...

The expression of brain-derived neurotrophic factor (BDNF) mRNA is increased significantly within the high vocal center (HVc) of male but not female zebra finches from posthatching day 30-35 on. The population of HVc cells expressing BDNF mRNA included 35% of the neurons projecting to the nucleus robustus of the archistriatum (RA). In the RA and in RA-projecting neurons of the lateral portion o...

Frontal and coronal sections of adult male and female canary brain were stained with a monoclonal antibody to vimentin using an immunoperoxidase technique; some sections were counterstained with cresyl violet. The position of radial glia cells was mapped using a computer-linked microscope. The telencephalon was found to have a rich set of radial glia. The long processes of these radial glia sho...

The neostriatum is strategically located in the forebrain and receives inputs from all cortical areas. The complexity of the corticostriatal pathways suggests that striatal neurons are in a unique position to process convergent inputs from cortex and through basal ganglia output nuclei to control subcortical nuclei and/or contribute to cortical dynamics via the thalamus. The most abundant neuro...

For a long time, it has been known that subarachnoid hemorrhage is likely to be followed by Korsakoff’s syndrome [13]. However, in many of the patients, the syndrome is transient. The remaining patients may show persistent anterograde memory deficits, as well as personality changes. This lasting syndrome is often referred to as ACoA (anterior communicating artery) syndrome because it is observe...

Spontaneous unit discharges were recorded extracellularly from globus pallidal (GP) neurons in rat slice preparations. The firing rates of GP neurons ranged from 2.0 to 24.0 spikes/s and their firing patterns were predominantly of two types: regular and irregular. Stimulation of the neostriatum evoked two distinct types of inhibition which were dependent on GP neuronal firing patterns, a brief ...

The presence of peers increases risk taking among adolescents but not adults. We posited that the presence of peers may promote adolescent risk taking by sensitizing brain regions associated with the anticipation of potential rewards. Using fMRI, we measured brain activity in adolescents, young adults, and adults as they made decisions in a simulated driving task. Participants completed one tas...