Glutamatergic system stimulationthe nucleus accumbens shell, may affect anxiety-related behaviors, aversive learning and memory. Glutamate receptors are differentially distributed in preand postsynaptic sites contributing to neuronal communications.The present study aimed to examine the possible involvement of the NAc shell presynaptic NMDA receptors on NMDA induced responses, using the elevate...

I affirm that I have written the dissertation myself and have not used any sources and aids other than those indicated. 21/10/2005 ______________________________________________ SUMMARY Spatial locations of objects can be represented in the brain with respect to different classes of reference frames, either relative to or independent of the subject's position. This fMRI study compared brain act...

Neuroimaging studies of functional activation often only reflect differentiated involvement of brain regions compared between task performance and control states. Signals common for both states are typically not revealed. Previous motor learning studies have shown that extensive motor skill training can induce profound changes in regional activity in both task and control states. To address the...

introduction: alzheimer’s disease (ad) is a enfeeble neurodegenerative disorder characterized by increased β-amyloid (aβ) deposition and neuronal dysfunction leading to impaired learning and recall. among proposed risk factors, impaired cholinergic transmission is a main cause for incidence of disease. methods: in the present study, effects of the intracerebroventricularly administration of an ...

Morphine’s effects on learning and memory processes are well known to depend on synaptic plasticity in the hippocampus. Whereas the role of the hippocampus in morphine-induced amnesia and state-dependent learning is established, the biochemical and molecular mechanisms underlying these processes are poorly understood. The present study intended to investigate whether administration of morphine ...

gastrointestinal (gi) and hepatic manifestations are not uncommon in patients with systemic lupus erythematosus (sle). they include nonspecific symptoms as well as serious, life-threatening complications necessitating urgent, aggressive therapy. in addition to direct involvement of the gi system by the disease, many drug-induced side effects and opportunistic infections have gi and hepatic mani...

The effect of division of attention between the evaluation of multichannel audio quality degradations and involvement in a visual task (playing a computer game) was investigated. Time-variant impairments (drop-outs) were used to provide degradations in audio quality. It was observed that involvement in a visual task may significantly change the results obtained during the evaluation of audio im...