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Alcohol is one of the most widely used recreational drugs, yet it is associated with undesirable social behaviour. It is used primarily for its psychoactive properties, increasing sociability and talkativeness. We hypothesize that low doses of alcohol can improve the performance related to positive emotional cognition. In this experiment, we examined the(More)
BACKGROUND Impaired cognitive flexibility in anorexia nervosa (AN) causes clinical problems and makes the disease hard to treat, but its neural basis has yet to be fully elucidated. The purpose of this study was to evaluate the brain activity of individuals with AN while performing a task requiring cognitive flexibility on the Wisconsin Card Sorting Test(More)
A clinicopathological study was made on 65 patients from a small area of Nagano Prefecture, Japan, with hereditary generalized amyloidosis with polyneuropathy to clarify the clinical variety of the disease. Forty-five patients from Ogawa village showed similar clinical features. The age of onset ranged widely from 16 to 62 years. The main neurological(More)
OBJECTIVE The objective of this study was to verify the hypothesis that variation of the serotonin transporter gene promoter region (5-HTTLPR) is associated with sensitivity to stress. METHODS Genotyping of 5-HTTLPR and evaluation of emotional states were performed on 194 participants. Participants' emotional states were evaluated using the(More)
BACKGROUND AND AIM Environmental factors such as food, lifestyle and prevalence of Helicobacter pylori infection are widely different in Asian countries compared with the West, and physiological functions and genetic factors of Asians may also be different from those of Westerners. Establishing an Asian consensus for functional dyspepsia is crucial in order(More)
OBJECTIVE To determine the efficacy of acotiamide, an acetylcholinesterase inhibitor, in patients with functional dyspepsia (FD) in a 4-week trial. METHODS A multicentre, randomised, placebo-controlled, parallel-group, phase III trial was carried out, in which patients with FD received 100 mg of acotiamide or placebo three times a day for 4 weeks, with 4(More)
AIMS To compare quality of life (QOL) for patients with irritable bowel syndrome (IBS) between the U.S. and Japan, it is indispensable to develop common instruments. The IBS-QOL, which is widely used in Western countries, was translated into Japanese as there has been a lack of Japanese disease-specific QOL measures for IBS. METHODS The original 34 items(More)
Alexithymia is a personal trait characterized by a reduced ability to identify and describe one's own feelings and is known to contribute to a variety of physical and behavioural disorders. To elucidate the pathogenesis of stress-related disorders and the normal functions of emotion, it is important to investigate the neurobiology of alexithymia. Although(More)
Altered central processing, abnormal gastrointestinal motility and visceral hypersensitivity may be possible major pathophysiology of irritable bowel syndrome (IBS). These factors affect each other and are probably associated with development of IBS symptoms. It has been confirmed that lower pain threshold to colonic distention was observed in most of(More)
The central histaminergic neuron system modulates the wakefulness, sleep-awake cycle, appetite control, learning and memory, and emotion. Previous studies have reported changes in neuronal histamine release and its metabolism under stress conditions in the mammalian brain. In this study, we examined, using positron emission tomography (PET) and(More)