Faculty Profiles - OHIRA, Hideki

Papers - OHIRA, Hideki

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New electrophysiologic features and catheter ablation of atrioventricular and atriofascicular accessory pathways: Evidence of decremental conduction and the anatomic structure of the Mahaim pathway

Okishige K., Goseki Y., Itoh A., Tsuboi N., Sasano T., Azegami K., Ohira H., Yamashita K., Satake S., Hiejima K.

Journal of Cardiovascular Electrophysiology Vol. 9 ( 1 ) page： 22 - 33 1998

Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Cardiovascular Electrophysiology

Introduction: Several modalities of catheter ablation have been proposed to eliminate Mahaim pathway conduction. However, limited research has been reported on the electrophysiologic nature of this pathway in its entity. Methods and Results: In seven patients, electrophysiologic study was performed, and radiofrequency energy was applied to investigate the electrophysiologic clues for successful ablation. In all seven patients, the Mahaim pathway was diagnosed as a right-sided atriofascicular or atrioventricular pathway with decremental properties. In two patients, two different kinds of electrograms were recorded through the ablation catheter positioned at the Mahaim pathway location: one was suggestive of conduction over the decremental portion, demonstrating a dulled potential; and the other of nondecremental conduction, demonstrating a spiked potential. All but one of the Mahaim pathways were eliminated successfully at the atrial origin where the spiked Mahaim potential was recorded. Radiofrequency energy application was performed at the slow potential site resulting in failure to eliminate the conduction over the Mahaim pathway. Conduction block at the site between the slow and fast potential recording sites was provoked by intravenous administration of adenosine, concomitant with a decrease in the amplitude of the Mahaim potential. In one patient, the clinical arrhythmia was a sustained monomorphic ventricular tachycardia originating from the ventricular end of the Mahaim fiber. Conclusion: The identification of Mahaim spiked potentials may be the optimal method to permit their successful ablation. Detailed electrophysiologic assessment is indispensable for successful ablation of tachycardias associated with Mahaim fibers because tachycardias unassociated with Mahaim fibers can occur despite complete elimination of the Mahaim fiber.

DOI： 10.1111/j.1540-8167.1998.tb00863.x

Scopus

Effects of stimulus valence on two processes of recognition: Analysis of memory and eyeblink. Reviewed

Ohira, H.

Progress in Asian Social Psychology Vol. 1 page： 205-216 1997

Processing mechanism underlying the Process-Dissociation Procedure: Analysis of memory, response latency, and eyeblink.

Ohira, H.

Vol. 17 page： 143-158 1997

Processing mechanism underlying the Process-Dissociation Procedure: Analysis of memory, response latency, and eyeblink.

Ohira, H

Vol. 17 page： 143-158 1997

Effects of stimulus valence on two processes of recognition: Analysis of memory and eyeblink. Reviewed

Ohira, H

Progress in Asian Social Psychology Vol. 1 page： 205-216 1997

Eyeblink activity in a word-naming task as a function of semantic priming and cognitive load Reviewed

Hideki Ohira

Perceptual and Motor Skills Vol. 84 ( 3 ) page： 835 - 842 1996.6

Language：English Publishing type：Research paper (scientific journal)

Eyeblink activity was examined based on a discrete-trial paradigm in which 17 subjects engaged in a semantic priming task. They were presented a series of pairs of words (prime and target) associatively related or associatively unrelated and were required to name them as quickly as possible. Cognitive load or difficulty of naming of the target word was also manipulated. The latency data for naming of the target word showed a typical priming effect, namely, facilitation of naming speed by the associatively related prime word. The eyeblink rate changed synchronically to onset of stimuli as a function of prime-target relationship and cognitive load during the task. Specifically, the eyeblink rate was suppressed during presentation of the target word and peaked just after that. This study showed that suppression of eyeblinks was longer on trials with high cognitive loads than on those with low cognitive loads and the peak of eyeblink rate was higher on trials for which the prime and target were unrelated than on those for which they were related. These results suggested that the eyeblink activity is influenced by inner cognitive processes of word recognition.

Scopus

PubMed

Spontaneous eyeblink as a measure of cognitive processes. Reviewed

Ohira, H.

Psychophysiology in Ergonomics Vol. 1 page： 51-52 1996

Eyeblink activity in a word-naming task as a function of semantic priming and cognitive load. Reviewed

Ohira, H.

Perceptual and Motor Skills Vol. 82 page： 835-842 1996

Spontaneous eyeblink as a measure of cognitive processes. Reviewed

Ohira, H

Psychophysiology in Ergonomics Vol. 1 page： 51-52 1996

Analysis of eyeblink activity during self-referent information processing in mild depression. Reviewed

Ohira, H.

Perceptual and Motor Skills Vol. 81 page： 1219-1229 1995

Analysis of eyeblink activity during self-referent information processing in mild depression. Reviewed

Ohira, H

Perceptual and Motor Skills Vol. 81 page： 1219-1229 1995

The effects of unconscious processing of hostility-related words and physiological arousal upon person perception.

Ohira Hideki

The Japanese journal of psychology Vol. 65 ( 2 ) page： 138 - 143 1994

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

The purpose of the present study was to examine the erects of the physiological arousal and the priorsubconscious processing of hostility-related words upon the cognitive complexity in person perception. First, sixteen male and 16 female college students performed a cognitive task in which they processed hostility-related words or neutral words unconsciously in a high arousal or a normal arousal state. In the second ostensibly unrelated task, the subjects were presented with an ambiguous description of target person's mild hostile behavior and they were asked to rate the impression of the target person on several SD-trait scales. It was found that the higher the subjects' arousal level was, the simpler the cognitive complexity became. Also, when the subjects processed neutral words in the high arousal state, individual differences of the impression were the largest. The effects of hostility-related words to decrease the individual differences in the high arousal state, however, were not found. These results indicate that physiological arousal may have an important role in the mechanisms of social cognition.

DOI： 10.4992/jjpsy.65.138

CiNii Books

Other Link： https://jlc.jst.go.jp/DN/JALC/00080618836?from=CiNii

FACIAL FEEDBACK EFFECTS ON IMPRESSION-FORMATION Reviewed

H OHIRA, K KURONO

PERCEPTUAL AND MOTOR SKILLS Vol. 77 ( 3 ) page： 1251 - 1258 1993.12

Language：English Publishing type：Research paper (scientific journal) Publisher：PERCEPTUAL MOTOR SKILLS

Two experiments were conducted to examine effects of facial expressions upon social cognitive processes in which the impression of another person is formed. In each experiment, 30 female college students were induced to display or conceal their facial reactions to a hypothetical target person whose behaviors were mildly hostile (Exp. 1) or mildly friendly (Exp. 2), or their facial expressions were not manipulated. Displaying the facial expressions shifted the impression into the congruent directions with hedonic values corresponding to the facial expressions. Concealing the facial expressions, however, did not influence impression formation. Also, the positive-negative asymmetry was observed in the facial feedback effects, that is, the negative facial expression had a stronger effect on social cognition than the positive one.

Web of Science

Facial feedback effects on impression formation. Reviewed

Ohira, H., Kurono, K.

Perceptual and Motor Skills Vol. 77 page： 1251-1258 1993

Facial feedback effects on affect-related memory and interpersonal perception. Reviewed

Ohira, H.

International Journal of Psychology Vol. 27 page： 191 1992

A mediating role of physiological arousal in social facilitation.

Ohira Hideki, Tajimi Tetsuo

The Japanese journal of psychology Vol. 62 ( 6 ) page： 369 - 372 1992

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japanese Psychological Association

An experiment was conducted to examine the mediating role of physiological arousal in social facilitation. It was hypothesized that the elevation of arousal level by the presence of other persons or evaluative apprehension would facilitate task performance. Twenty-four male and 24 female college students performed simple task alone, with a cooperative person, or with a competitive person. One half of the subjects was given an instruction which would produce evaluative apprehension. Subjects' skin potential responses were measured as the indices of physiological arousal. Although the hypothesis was supported by the analysis of psycho-physiological index, but it was not at all by the self-reported index of arousal.

DOI： 10.4992/jjpsy.62.369

CiNii Books

Other Link： https://jlc.jst.go.jp/DN/JALC/00078617513?from=CiNii

Facial feedback effects on affect-related memory and interpersonal perception. Reviewed

Ohira, H

International Journal of Psychology Vol. 27 page： 191 1992

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