ABSTRACT
Psychiatric manifestations are common in patients with Wilson's Disease(WD), and they are usually correlated with neurological symptoms. However, psychotic presentation without neurological symptoms has rarely been reported. We present a case of WD involving a 34-year-old gentleman who was diagnosed at the age of 22, but due to lack of medication for approximately 5 months was admitted in a psychiatric ward with delusional thoughts of grandeur and persecution, echopraxia and echolalia. No neurological impairment, ophthalmic manifestations or liver abnormalities were identified. Through this report, we aim to discuss the pathophysiology and the treatment of psychosis in WD, and its association with neurological, liver and ophthalmic manifestations.
ABSTRACT
Subtle disturbances of visual and motor function are known features of schizophrenia and can greatly impact quality of life; however, few studies investigate these abnormalities using simple visuomotor stimuli. In healthy people, electrophysiological data show that beta band oscillations in sensorimotor cortex decrease during movement execution (event-related beta desynchronisation (ERBD)), then increase above baseline for a short time after the movement (post-movement beta rebound (PMBR)); whilst in visual cortex, gamma oscillations are increased throughout stimulus presentation. In this study, we used a self-paced visuomotor paradigm and magnetoencephalography (MEG) to contrast these responses in patients with schizophrenia and control volunteers. We found significant reductions in the peak-to-peak change in amplitude from ERBD to PMBR in schizophrenia compared with controls. This effect was strongest in patients who made fewer movements, whereas beta was not modulated by movement in controls. There was no significant difference in the amplitude of visual gamma between patients and controls. These data demonstrate that clear abnormalities in basic sensorimotor processing in schizophrenia can be observed using a very simple MEG paradigm.
