A simple test examining involuntary eye movements may provide an objective way to tell whether individuals have attention-deficit/hyperactive disorder (ADHD) and whether stimulant medication will be an effective treatment, new research suggests. Investigators from Tel Aviv University in Tel Hashomer, Israel, observed increased microsaccades and blink rates in adults with ADHD, which normalized with methylphenidate treatment. “Striking” Predictive Effect “The rationale behind our study was following recent studies ― of ours and others ― which found that the rate of microsaccades is inversely correlated with the level of attention,” Dr. Fried told Medscape Medical News. In this latest study, the investigators recorded involuntary eye movements in 22 adults with ADHD with and without methylphenidate and 22 control individuals while they performed the test of variables of attention (TOVA). They found that unmedicated ADHD patients had significantly higher rates of eye blinks and microsaccades compared with control participants. This effect was largest in the peristimulus period, “where eye movements should be suppressed because they could interfere with the task,” the researchers write. In addition, stimulant medication had a “striking effect” on involuntary eye movements, with full normalization of the microsaccade rate to the control level and partial normalization of blink rates, mainly in the peristimulus interval, they report.
0 15 diciembre, 2014
Posted in Psiquiatría y psicología by qubitoz