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BACKGROUND Patients with amnestic mild cognitive impairment (MCI) have greater risk of conversion to Alzheimer disease (AD). Increased brain amyloid burden in AD and MCI has been demonstrated with PET using [(11)C] Pittsburgh compound B (PiB) as a tracer. OBJECTIVE To evaluate change in β-amyloid deposition in with MCI during 2-year follow-up. METHODS(More)
BACKGROUND Early stage patients with Parkinson's disease (PD) show cognitive impairment in frontal lobe functions and memory tests. Hippocampal atrophy is seen in medicated patients with advanced PD. OBJECTIVES To examine whether prefrontal or hippocampal atrophy are already present in early stage PD, and whether such atrophy is associated with cognitive(More)
Post mortem studies have revealed a loss of dopamine D2 receptors in the temporal lobes in Alzheimer's disease (AD). Moreover, the role of hippocampal D2 receptors on memory performance has been suggested in experimental studies. However, there are no previous in vivo studies on extrastriatal D2 receptors in AD. Our aim was to examine in vivo whether(More)
(2003). The amygdala and schizophrenia: a volumetric magnetic resonance imaging study in first-episode, neuroleptic-naive patients. (2003). Regional brain morphology and duration of illness in never-medicated first-episode patients with schizophrenia. Schizophrenia research 64:79-81. A volumetric MRI study of the entorhinal cortex in first episode(More)
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