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Biomedical subjects

Tomokazu Kidani

Publications and source records attributed to Tomokazu Kidani.

6 recordsLinked to original sources
PubMed2005

Relationship between anxiety and thyroid function in patients with panic disorder.

The aim of this study was to investigate correlations between thyroid function and severity of anxiety or panic attacks in patients with panic disorder. The authors examined 66 out-patients with panic disorder (medicated, n=41; non-medicated, n=25), and measured their free thriiodothyronine (T3), free thyroxine (T4) and thyroid-stimulating hormone (TSH) levels. Significant correlations between the thyroid hormone levels and clinical features were observed in the non-medicated patients. The more severe current panic attacks were, the higher the TSH levels were. In addition, severity of anxiety correlated negatively with free T4 levels. In this study, we discuss relationship between thyroid function and the clinical severity or features of panic disorder.

Adolescent↗
PubMed2005

Panic disorder with and without agoraphobia: comorbidity within a half-year of the onset of panic disorder.

The present study was performed to compare the clinical features of patients with panic disorder with and without agoraphobia. The subjects were 233 outpatients with panic disorder (99 males and 134 females) diagnosed according to DSM-IV criteria. Sixty-three patients met the criteria for panic disorder without agoraphobia, and 170 met the criteria for panic disorder with agoraphobia. Patients with agoraphobia showed a significantly longer duration of panic disorder and higher prevalence of generalized anxiety disorder. However, there were no significant differences in prevalence of major depressive episodes, in current severity of panic attacks, or in gender ratio between the two groups. The second aim of the present study was to investigate the effects of onset age and sex differences on the development of agoraphobia within a half-year. The subjects were divided into two groups according to their self-report: patients who did or did not develop agoraphobia within 24 weeks of onset of panic disorder. A total of 40.6% of the patients developed agoraphobia within 24 weeks of the onset of panic disorder, and onset age and sex differences had no robust effect on the development of agoraphobia within 24 weeks.

Adult↗
PubMed2005

EEG coherence analysis in never-medicated patients with panic disorder.

To investigate the functional abnormalities in the central nervous system (CNS) of patients with panic disorder (PD), we compared the electroencephalography (EEG) coherence values in 18 never-medicated PD patients with those in age-matched normal control subjects, and examined the relationships between EEG coherence values and both the duration of disease and the severity of panic attacks. EEG data were recorded in the resting state. The PD patients had lower coherence values with significant differences in F3-F4, C3-C4, P3-P4, F7-T5, and F8-T6. There were positive correlations for the higher alpha band between coherence values and both the duration of disease and the severity of panic attacks. These findings provide further evidence that PD patients have a lower degree of inter-hemispheric functional connectivity in the frontal region and intra-hemispheric functional connectivity in the bilateral temporal region, and that chronic condition or frequent panic attacks in PD patients may be related to the pathophysiological CNS changes.

Adult↗
PubMed2004

Severe delirium due to basal forebrain vascular lesion and efficacy of donepezil.

A severe intractable delirium caused by the basal forebrain vascular lesion and its dramatic recovery after donepezil administration were reported. A 68-year-old man had suffered for a month from delirium of mixed type caused by the right basal forebrain vascular lesion after surgery for craniopharyngioma. Magnetic resonance imaging (MRI) showed hemorrhagic infarcts in the head of the right caudate nucleus and the right basal forebrain of the medial septal nucleus, diagonal band of Broca and nucleus basalis of Meynert. He had been treated with anti-psychotics, anti-depressants and hypnotics, which resulted in little improvement. Donepezil administration dramatically improved his intractable delirium at the 19th post-donepezil administration day, but this was followed by amnestic symptoms. Clinical correlates of delirium with the basal forebrain lesion and efficacy of donepezil support the hypocholinergic theory of delirium.

Aged↗
PubMed2004

Pick's disease pathology of a missense mutation of S305N of frontotemporal dementia and parkinsonism linked to chromosome 17: another phenotype of S305N.

We report the second phenotype of frontotemporal dementia and parkinsonism linked to chromosome 17 with S305N similar to Pick's disease pathology in two brothers. The brain of the older brother showed macroscopic atrophy compatible with Pick's disease, and subsequent tau gene analysis revealed heterozygous S305N mutation in exon 10 of the tau gene. Round-shaped neuronal inclusions similar to Pick's bodies were positive for phosphorylated serine 262 as well as other anti-tau antisera, which is different from immunoexpression of Pick's bodies. Ultrastructurally, these neuronal inclusions consisted of straight, randomly orientated fibrils measuring approximately 10-20 nm in width and 60-600 nm in length. This ultrastructural profile is similar to that of the first case of S305N. S305N reported here can cause another phenotype closely resembling Pick's disease.

Asparagine↗