N-Methyl-D-Aspartate receptors (NMDARs) play important physiological as well as pathological roles in the central nervous system (CNS). While NMDAR competitive antagonists, such as D-2-Amino-5-Phosphopentanoic acid (AP5) have been shown to impair learning and memory, the non-competitive antagonist, memantine, is paradoxically beneficial in mild to moderate Alzheimer's disease (AD) patients. It ...

Prophylactic migraine treatment has always been a challenge. Efficacy and tolerability are two main issues in current approved migraine prevention regimens. Since some migraine patients fail approved preventative agents, experts are always seeking newer agents. Memantine, a glutaminergic antagonist, could potentially be one of these agents. Objective of current study is assessing the efficacy o...

We studied the effects of acetylcholinesterase inhibitors, donepezil and galantamine, and an N-methyl-D-aspartate (NMDA) receptor blocker, memantine, on sleep-wake architecture in rats. Screw electrodes were chronically implanted into the frontal and parietal cortex for the electroencephalography (EEG). EEG was recorded with a bio-potential amplifier for 8 h from 09:30 to 17:30. Vibration was r...

PURPOSE This pilot prospective study sought to determine whether dynamic contrast enhanced MRI (DCE-MRI) could be used as a clinical imaging biomarker of tissue toxicity from whole brain radiotherapy (WBRT). METHOD 14 patients who received WBRT were imaged using dynamic contrast enhanced DCE-MRI prior to and at 8-weeks, 16-weeks and 24-weeks after the initiation of WBRT. Twelve of the patient...

INTRODUCTION The brain glutamate neurotransmitter system and its NMDA (N-methyl-D-aspartate) receptors in the nucleus accumbens play an important role in the incidence of sensitivity and addiction. The present study examined the inhibitory effect of glutamate NMDA receptors in the nucleus accumbens in response to chronic stress. METHODS After the unilateral and bilateral placement of cannula(...

Memantine and neramexane are noncompetitive NMDA receptor antagonists which have been investigated for their promising effects in aiding memory in people with dementia. Memantine is approved for the treatment of Alzheimer's disease, and neramexane is currently under development for this indication. Therefore, the present study provided a comparative assessment of the effects of equimolar doses ...

Aim: The aim of this study is to evaluate the effect of memantine on negative symptoms in patients with schizophrenia and schizoaffective. Methods: This is a double- blind randomized clinical trial. 58 patients participated in the study, 29 patients were randomly assigned to the memantine group and 29 patients to the placebo group. For assessing negative signs, and we used scale for the assess...

Introduction: Morphine withdrawal syndrome is mediated via several central and peripheral neurological pathways. In the present study we investigated the role of N-methyl-D aspartic acid (NMDA) glutamate receptor on naloxone-induced withdrawal syndrome in morphine-conditioned mice. Materials and Methods: We designed two separate experiments. In experiment one, 30 male NMRI mice were divide...

We investigated a possible drug efficacy enhancement obtained by combining inactive doses of galantamine and memantine in the scopolamine-induced amnesia model in mice. We evaluated the effects of the two drugs, either alone or in combination, using the spontaneous alternation and object recognition tasks. In both tests, combination of low doses of galantamine (0.1 mg/kg, s.c.) and memantine (0...

BACKGROUND Myoclonus can be a clinical manifestation of numerous neurodegenerative disorders and an adverse drug reaction to medications used in their treatment. CASE REPORT Herein, we report memantine-induced myoclonus in a patient with Alzheimer disease. The myoclonus seen in our patient was generalized (proximal limbs and trunk), present at rest and with action, and stimulus sensitive. A s...