Learn More
BACKGROUND Although recent neuroimaging and therapeutic transcranial magnetic cortex stimulation (TMS) studies suggest imbalance between left and right dorsolateral prefrontal cortex (DLPFC) in major depressive disorder (MDD) the fundamental neuropsychological characterization of left DLPFC hypoactivity and right DLPFC hyperactivity in MDD remains poorly(More)
Studies using functional magnetic resonance imaging (fMRI) show predominant negative blood oxygenation level-dependent (BOLD) responses (NBRs) in regions of the default-mode network such as the pregenual anterior cingulate cortex, the ventromedial prefrontal cortex, and the posterior cingulate cortex. Patients with major depressive disorder (MDD) show(More)
Patients with major depressive disorder (MDD) often show a tendency to strongly introspect and reflect upon their self, which has been described as increased self-focus. Although subcortical-cortical midline structures have been associated with reflection and introspection of oneself in healthy subjects, the neural correlates of the abnormally increased(More)
OBJECTIVE The study investigated relationships between rapid cerebral hemodynamic modulation and attentional performance. Based on former results on complex cognitive functioning, a specific association between the first seconds of the hemodynamic response and performance was hypothesized. METHODS Using transcranial Doppler sonography, blood flow(More)
Transcranial Doppler sonography (TCD) was applied in normal subjects to investigate the effect of prefrontal functions like the Tower of Hanoi (TOH) task and the Wisconsin Card Sorting test (WCST) on cerebral hemodynamics. In 20 healthy volunteers, left and right middle cerebral artery (MCA) and anterior cerebral artery (ACA) were insonated. The TOH task(More)
The early course of neuropsychological dysfunction in schizophrenia and the impact of treatment on these deficits need to be better specified. A sample of 45 patients with schizophrenia underwent five neuropsychological evaluations from prior to treatment with antipsychotic treatment through a 2-year follow-up period. A comparison sample of 33 matched(More)
OBJECTIVES Functional imaging studies in major depressive disorder (MDD) indicate abnormal resting state neural activity and negative blood oxygenation level-dependent (BOLD) responses (NBRs) in regions of the default-mode network (DMN). METHODS Since activity in DMN regions has been associated with self-relatedness, we investigated neural activity in(More)
Patients with first-episode schizophrenia show significant cognitive impairments even at this early phase of their illness. Antipsychotic medication improves clinical symptomatology, but the effectiveness of this treatment on neuropsychological deficits remains unclear. We investigated clinical symptom and neuropsychological performance change in 34(More)
OBJECTIVE Although there is evidence of specific associations between neuronal activity and early cerebral blood flow (CBF), little is known on a logical furtherance of this linkage, namely the association between early measures of cerebral hemodynamics and complex behavior. The present study examined the linkage between hemodynamic modulation in basal(More)
OBJECTIVE Patients with schizophrenia show deficits in planning, and the Stockings of Cambridge (SOC) is a task that assesses planning performance. This study was undertaken to investigate rapid changes of cerebral hemodynamics during separate phases of SOC in schizophrenia and normals by means of functional transcranial Doppler sonography (fTCD). METHODS(More)