Chan-Hyung Kim

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Attention deficit hyperactivity disorder (ADHD) is a psychiatric disorder in childhood that is known to be associated with dopamine dysregulation. In this study, we investigated dopamine transporter (DAT) density in children with ADHD using iodine-123 labelled N-(3-iodopropen-2-yl)-2β-carbomethoxy-3β-(4-chlorophenyl) tropane ([123I]IPT) single-photon(More)
The current study is a preliminary test of a virtual reality (VR) anxiety-provoking tool using a sample of participants with obsessive-compulsive disorder (OCD). The tasks were administrated to 33 participants with OCD and 30 healthy control participants. In the VR task, participants navigated through a virtual environment using a joystick and head-mounted(More)
Catechol-O-methyltransferase (COMT) and monoamine oxidase A (MAOA) are both involved in the degradation of various biogenic amines which have been hypothesized to have a relationship with personality traits. The present study investigated the possible relationships between the genotypes of COMT Val158Met and MAOA-uVNTR polymorphisms and personality traits(More)
Insight and hopelessness have been reported to be associated with suicidality in schizophrenia. In addition, there is evidence that diminished insight is correlated with impairment in some domains of cognitive function in schizophrenia. The purpose of this study was to clarify the relative importance for suicidality in patients with schizophrenia of(More)
Atrial natriuretic peptide (ANP) is a cardiac peptide, the transcription of which is up-regulated in the ischaemic ventricle. However, the molecular mechanism of ANP induction is unclear. This study demonstrated that ANP mRNA expression in rat ventricular myocardium is induced in an early phase of ischaemia, preceded by hypoxia-inducible factor-1 (HIF-1)(More)
We studied the 2-year outcome of deep-brain stimulation at the ventral anterior limb of the internal capsule and ventral striatum for 4 patients with treatment-resistant OCD. There were prolonged improvement of obsessive-compulsive symptoms and depressive symptoms along with notable functional improvement in all participants with no battery depletion.
OBJECTIVES The objective of this study was to evaluate the efficacy and tolerability of blonanserin for the treatment of Korean patients with schizophrenia using a double-blind risperidone-compared design. METHODS Patients aged 18 to 65 years with schizophrenia were randomly assigned to blonanserin or risperidone treatment for 8 weeks. The efficacy was(More)
Obsessive-compulsive disorder (OCD) is a clinically heterogeneous disorder; nonetheless, most of the previous neuropsychological studies for assessing the involvement of memory dysfunction grouped together patients with different symptoms, thereby potentially accounting for the inconsistencies of results. The goals of this study were to compare the memory(More)
OBJECTIVE The present study investigated possible therapeutic effects and safety of sequentially combined low-frequency repetitive transcranial magnetic stimulation (rTMS) to the right dorsolateral prefrontal cortex and supplementary motor area in patients with treatment-resistant obsessive-compulsive disorder. METHOD Between February 2007 and January(More)
Dysfunctional emotional processing affects social functioning in patients with schizophrenia. However, the relationship between emotional perception and response in social interaction has not been elucidated. Twenty-seven patients with schizophrenia and 27 normal controls performed a virtual reality social encounter task in which they introduced themselves(More)