This study examined whether Parkinson's disease (PD 1) and schizophrenia (SCZ 2) share
a hypo dopaminergic dysfunction of the prefrontal cortex leading to cognitive impairments in …

BACKGROUND: Frontostriatal and cognitive dysfunctions in Parkinson's disease (PD) are
hypothesized to be linked predominately to dopaminergic dysfunction within neural …

Processing speed is the most impaired neuropsychological domain in schizophrenia and a
robust predictor of functional outcome. Determining the specific cognitive operations …

Cognitive slowing, or bradyphrenia, is a hallmark symptom of subcortical disorders (SCDs),
which otherwise are clinically characterized by their pathognomonic motor symptoms and …

Schizophrenic patients generally perform poorly on tasks that address executive functions.
According to several imaging studies, the dorsolateral prefrontal cortex is hypoactive in …

The basal ganglia have received increasing attention with regard to their role in time pacing,
motor function and other components of cognition. The aim of this study was to test whether …

Cognitive and behavioral abnormalities are frequent in Parkinson's disease (PD) but their
anatomical correlates are still uncertain. We assessed a cohort of 59 PD patients with and …

Introduction Bradyphrenia is a key cognitive feature in Parkinson's disease (PD). There is no
consensus on whether information processing speed is impaired or not beyond motor …

Functional magnetic resonance imaging was used to compare cortical activation patterns in
healthy volunteers with those in patients with schizophrenia during a modified verbal Stroop …

INTRODUCTION: Studies of prefrontal cortical (PFC) function in schizophrenia have been
inconsistent, with studies showing both increased and decreased PFC activation compared …