Takuto Hayashi

Learn More
Severe and chronic stress can induce many kinds of diseases including mental disorders. The aim of this paper is to assess whether objective physiological responses from an electroencephalogram (EEG) and an electrocardiogram (ECG) can qualify stress level or not. The stress levels of twenty-two healthy subjects were evaluated with questionnaire methods, and(More)
The objective of this research is to assess the relationship between brain functional responses to emotional stimuli and the mental stabilities of people using functional magnetic resonance imaging (fMRI). We evaluated personality features and physical symptoms of the subjects using psychological tests and categorized the subjects into two groups: the(More)
The structure of the neural circuitry of the cerebellum, which functions in some types of motor learning and coordination, is generally conserved among vertebrates. However, some cerebellar features are species specific. It is not clear which genes are involved in forming these conserved and species-specific structures and functions. This study uses(More)
The aim of this study is to investigate whether stress states affect brain responses in the regions related to emotional and cognitive processing. The brain activities of thirty-three healthy adults divided into stress and non-stress groups according to their stress responses were assessed during emotional audio-visual stimuli using functional magnetic(More)
The current study evaluated the effect of different anxiety states on information processing as measured by an electroencephalography (EEG) using emotional stimuli on a smartphone. Twenty-three healthy subjects were assessed for their anxiety states using The State Trait Anxiety Inventory (STAI) and divided into two groups: low anxiety (I, II) or high(More)
The aim of this research is to evaluate the relationship between hippocampal responses to emotional stimuli and the mental stabilities of people using functional magnetic resonance imaging (fMRI). We assessed personality features and physical symptoms of the subjects using psychological tests and categorized the subjects into two groups: the mentally stable(More)
The present study investigates phase-locked and non-phase-locked brain responses in theta and alpha frequency bands. A 122-ch whole-head magnetoencephalogram (MEG) was recorded continuously during emotional audio-visual stimuli. The results showed that emotional stimuli induced increased theta band phase-locked activity at 200-400 ms and non-phase-locked(More)
Posttraumatic stress disorder (PTSD) has steadily grown in Japan since ldquothe great Hanshin-Awaji earthquakerdquo in 1995. The aim of this paper is to assess whether personality stability can affect brain reactions evoked by earthquake traumatic stimuli or not. The personality stability of 22 healthy subjects was evaluated, and the subjects were(More)