Mark Legault

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The nucleus accumbens septi receives inputs from dopaminergic neurons of the ventral tegmental area (VTA) and glutamatergic neurons of the ventral subiculum (VS). The convergence of these inputs in the NAS is important for the normal expression of exploratory locomotion; stimulation of the VS by injection of the glutamate receptor agonist(More)
Dual-probe microdialysis (with HPLC and electrochemical detection) in freely moving rats and single-unit recording in anesthetized rats were used to study the extent to which impulse flow through the ventral tegmental area (VTA) contributes to elevations in nucleus accumbens (NAS) dopamine (DA) evoked by stimulation of the ventral subiculum (VS). During(More)
In vivo microdialysis in freely moving rats was used to monitor novelty-evoked elevations in extracellular dopamine in the nucleus accumbens septi (NAS) and to examine the role of the ventral subiculum of the hippocampus and glutamatergic transmission in the ventral tegmental area (VTA) on these elevations. Exposure to novel stimuli evoked investigatory(More)
Neurotensin (NT) increases neurotransmission within the mesolimbic dopamine system by enhancing the firing rate of dopaminergic (DAergic) neurons and by acting at the nerve terminal level. The signal transduction pathways involved in these effects have not been characterized, but NT receptors are coupled to the phospholipase C pathway and Ca(2+)(More)
OBJECTIVE Data were analyzed from 2 prospective, double-blind, placebo-controlled trials of escitalopram in obsessive-compulsive disorder (OCD) to characterize the baseline levels of functional disability and impairment in health-related quality of life (HRQoL) and to assess the relationship between treatment outcomes (response or relapse) and disability or(More)
OBJECTIVE An observational study showed that combining memantine with a cholinesterase inhibitor (ChEI) treatment significantly delayed admission to nursing homes in patients with Alzheimer disease (AD). Our study aimed to evaluate the economic impact of the concomitant use of memantine and a ChEI, compared with a ChEI alone, in a Canadian population of(More)
BACKGROUND The present trial was designed to assess the efficacy and safety of escitalopram prescribed to patients seeking treatment of major depressive disorder (MDD) in a Canadian primary-care setting. METHODS Investigators (mainly primary-care physicians) enrolled patients with MDD from their daily practice. Patients were treated with escitalopram(More)
OBJECTIVE To evaluate the effectiveness and tolerability of escitalopram (10-20 mg/day) in adult outpatients suffering from major depressive disorder in naturalistic settings. METHODS An open-label, 3-month, surveillance study was conducted in 434 investigative sites in Greece enrolling 5175 patients. Clinical Global Impression-Severity (CGI-S) scale and(More)