Asymmetry of basal ganglia in children with attention deficit hyperactivity disorder.

Attention deficit hyperactivity disorder (ADHD) is a common neuropsychiatry disorder with several key symptoms, such as inattentiveness, impulsivity and hyperactivity. Neuropsychiatry studies have implicated the frontostriatal circuit in the pathological physiology of the disorder. Using magnetic resonance imaging (MRI), we examined the basal ganglia in 13 ADHD patients and eight unaffected comparison children. The volume of caudate, putamen and globus pallidus was measured. In the ADHD patients, we detected an increased left > right asymmetry of the basal ganglia. This reversal of asymmetry in the globus pallidus and caudate nucleus were statistically significant. These finding provide further evidence of morphological brain abnormalities in ADHD.

Is it possible to actively and purposely make use of plasticity and adaptability in the neurorehabilitation treatment of multiple sclerosis patients? A pilot project.

OBJECTIVE: To investigate whether neurorehabilitation is able to influence clinical parameters and brain function measured radiologically. DESIGN: A group of healthy probands was compared with two groups of multiple sclerosis (MS) patients, one of which received rehabilitative therapy. SETTING: Outpatient in a university hospital. SUBJECTS: Twenty-eight patients with multiple sclerosis (MS), 17 of whom received rehabilitative therapy, and 13 healthy controls. INTERVENTIONS: Two months of rehabilitative eclectic therapy based on principles of sensorimotor learning and adaptation. MAIN MEASURES: Multiple Sclerosis Functional Composite, Modified Fatigue Impact Scale, Beck Depression Inventory Score, Barthel Index, Environment Status Scale and Multiple Sclerosis Quality of Life--54, and functional magnetic resonance imaging (fMRI). RESULTS: Patients who underwent neurorehabilitation showed a greater drop in fatigue, depression, impairment, disability and handicap and more improvement in quality of life than those who did not receive therapy. Correlation of brain activity between the right and the left hemisphere is greater in healthy individuals than in MS patients. Neurorehabilitation resulted in a trend for increased correlation between the left and the right hemisphere in patients (approaching the standard). In comparison with control groups, signal amplitudes in anatomical areas did not show any significant changes. CONCLUSION: Clinical changes seen with neurorehabilitation were not associated with any detectable changes in fMRI observations.