Hiroko Komatsu

Kurume University, Куруме, Fukuoka, Japan

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Publications (4)8.27 Total impact

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    ABSTRACT: This study investigated the hypothalamus-pituitary-adrenal (HPA) axis activity in children with anorexia nervosa (AN) before and after inpatient treatment. Salivary cortisol levels were measured to ascertain whether changes in the HPA axis activity following therapeutic intervention could be applicable as a prognostic predictor. This study comprised 21 females with AN and 22 control subjects. Saliva was collected at 2-hour intervals from 9 a.m. to 7 p.m. before and after inpatient treatment. The concentrations for areas under the curve (AUC) were compared with physical parameters, eating attitude score, profile of mood states (POMS), and prognostic factors. Mean salivary cortisol levels at all points and mean AUC cortisol levels in subjects with AN before therapy were significantly higher than those in controls, but returned to control levels after inpatient treatment. Higher AUC cortisol levels were associated with lower standard deviation for weight in AN. A significant positive correlation between the AUC cortisol level and POMS subscale of "Fatigue" was apparent in the control group, but not in the AN group. The increased change values of AUC cortisol level before and after inpatient treatment correlated with increased body weight gain ratio just after treatment, but not with the ratio after one year. The present study indicated that HPA axis activity could reflect severity of illness, but did not show an accurate neuroendocrine response for mood states. Changes in HPA axis activity following treatment could therefore be used to predict prognosis and particularly in the short term.
    International journal of psychophysiology: official journal of the International Organization of Psychophysiology 09/2011; 82(2):196-201. · 3.05 Impact Factor
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    ABSTRACT: A six-year-old girl living in a residential care facility because of previous sexual abuse at home showed intractable seizures with epileptic discharges on interictal EEG. The features of the attacks were sudden impaired consciousness, only in daytime while eating, studying, and walking, with no motor acts and continuing for several minutes to one hour. She could not recall the attacks, and anticonvulsants showed no effects. She gradually became irritated and antisocial, exhibiting impulsive and hyperactive behavior. Interictal EEG repeatedly showed diffuse irregular spikes and wave complexes. The attacks continued sporadically for more than two years and ceased after disclosure of repeated sexual abuse by a boy at the residential care facility. In this case, delayed diagnosis of psychogenic nonepileptic seizures was associated with diagnostic difficulty of dissociative symptoms in a child, the presence of epileptiform EEG in an abused child, and undetected sexual abuse in a residential care facility, the potential for which pediatric neurologists should be aware. These pitfalls are discussed in the context of previous related literature.
    Brain & development 10/2010; 33(7):601-3. · 1.74 Impact Factor
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    ABSTRACT: To investigate the changes of regional cerebral blood flow (rCBF) in early-onset anorexia nervosa (AN) before and after weight gain, we examined resting rCBF using single photon emission computed tomography (SPECT) with [(123)I]iodoamphetamine ((123)I-IMP). Ten female children with AN (mean age 13.2 years old) participated in this study. SPECT examinations were performed in all patients twice at the beginning of treatment and after weight gain. The mean body mass index (BMI) was changed from 13.1 to 16.6 during 4 months treatment period. Automatic voxel-based analysis of the images was carried out using statistical parametric mapping (SPM) software. Relatively increased rCBF in the bilateral parietal lobe and limbic lobe including the posterior cingulate cortex (PCC) were observed after weight gain in early-onset AN. There was no significant decrease in the rCBF after weight gain. A significant positive correlation was observed between BMI and rCBF in the right thalamus, right parietal lobe, and right cerebellum. These results suggested that weight gain during the process of recovery from early-onset AN might activate specific brain regions which are possibly relevant to the pathophysiological aspects of the disorder.
    Brain & development 10/2009; 32(8):625-30. · 1.74 Impact Factor
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    ABSTRACT: The aim of this study was to investigate the prefrontal activation in childhood anorexia nervosa (AN) patients when imaging symptom-provocative factors such as body type, high-calorie food, and attachment between mother and child. The prefrontal activations during each task, in terms of blood volume changes, were measured by near infrared spectroscopy. Twelve females with childhood AN (mean age, 14.4 years old) and 13 age-matched healthy female controls (mean age, 14.3 years old) participated in this study. Both groups showed increased prefrontal blood volume when viewing images of each symptom-provocative factor. Unexpectedly, there was no significant difference in the prefrontal blood volume increases between the control group and the childhood AN group when viewing images of slender and obese body types and high-calorie food. On the other hand, images of mother-child attachment resulted in significantly greater increases in prefrontal blood volume in the childhood AN group than in the control group. These results indicated that prefrontal activation in AN might be associated with imaging attachment between mother and child, but not associated with imaging body type or high-calorie food.
    Brain & development 03/2009; 32(2):162-7. · 1.74 Impact Factor