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Effects of monoaminergic drugs on training-induced motor cortex plasticity in older adults.
Abstract Primary motor cortex (M1) plasticity is involved in motor learning and stroke motor recovery, and enhanced by increasing monoaminergic transmission. Age impacts these processes but there is a paucity of systematic studies on the effects of monoaminergic drugs in older adults. Here, in ten older adults (age 61+ 4 years, 4 males), we determine the effects of a single oral dose of carbidopa/levodopa (DOPA), d-amphetamine (AMPH), methylphenidate (MEPH) and placebo (PLAC) on M1 excitability and motor training-induced M1 plasticity. M1 plasticity is defined as training related long lasting changes in M1 excitab...
Source: Brain Research - June 17, 2017 Category: Neurology Authors: Kesar TM, Belagaje SR, Pergami P, Haut MW, Hobbs G, Buetefisch CM Tags: Brain Res Source Type: research

Procedural learning as a measure of functional impairment in a mouse model of ischemic stroke.
Abstract Basal ganglia stroke is often associated with functional deficits in patients, including difficulties to learn and execute new motor skills (procedural learning). To measure procedural learning in a murine model of stroke (30min. right MCAO), we submitted C57Bl/6J mice to various sensorimotor tests, then to an operant procedure (Serial Order Learning) specifically assessing the ability to learn a simple motor sequence. Results showed that MCAO affected the performance in some of the sensorimotor tests (accelerated rotating rod and amphetamine rotation test) and the way animals learned a motor sequence. Th...
Source: Behavioural Brain Research - March 17, 2016 Category: Neurology Authors: Linden J, Beeck LV, Plumier JC, Ferrara A Tags: Behav Brain Res Source Type: research