Acquired higher brain dysfunction is for the most part due to cerebral vascular disease, but epil... more Acquired higher brain dysfunction is for the most part due to cerebral vascular disease, but epilepsy may also be a cause. In this study with five patients, we discuss the advantages of anti-epileptic drugs (AEDs) for persistent higher brain dysfunction. The patients showed chronic amnesia or acute aphasia, with associated symptoms like personality change. All five cases affected automatism or convulsive attack, though only after the emergence of higher brain dysfunction and administration of AEDs. There were underlying diseases like cerebral arteriovenous malformation in four cases, but the other patient had none. Electroencephalogram and single photon emission computed tomography revealed one case of aphasia epilepsy with higher brain dysfunction. These results suggest the potential therapeutic efficacy of AEDs for persistent higher brain dysfunction, and we must differentiate epilepsy with higher brain dysfunction from dementia or cerebral vascular disease.
Cerebral dyschromatopsia is traditionally evaluated by color discrimination tests such as the Far... more Cerebral dyschromatopsia is traditionally evaluated by color discrimination tests such as the Farnsworth-Maunsell 100 Hue Test. These tests are also used to evaluate color-perception deficits caused by eye disease, and they do not tell us whether color perception is impaired in the eye or in the brain. Here, we used color afterimage to isolate color-perception deficits in the brain from those in the eyes, in a patient with cerebral dyschromatopsia. The results showed that the patient perceived color afterimage of yellow and blue with abnormal duration and chromaticity. On the other hand, the patient performed normally on the Farnsworth-Maunsell 100 Hue Test. We conclude that the color afterimage test would be useful to evaluate color perception in the brain.
Altering physical actions when responding to changing environmental demands is important but not ... more Altering physical actions when responding to changing environmental demands is important but not always effectively performed. This ineffectiveness, which is an error of social behavior generated by mutual interactions, is not well understood. This study investigated mechanisms of a hesitant behavior that occurs in people walking toward each other, causing people to move in the same direction when attempting to avoid a collision. Using a motion capture device affixed to 17 pairs, we first confirmed the hesitant behavior by a difference between the experimental task, which involved an indeterminate situation to assess the actions of another individual, and the control task, which involved a predetermined avoiding direction, in a real-time situation involving two people. We next investigated the effect of three external factors: long distance until an event, synchronized walking cycle, and different foot relations in dyads on the hesitant behavior. A dramatic increase in freezing and near-collision behavior occurred in dyads for which the avoiding direction was not predetermined. The behavior related with the combination of long distance until an event, synchronized walking cycle, and different foot relations in dyads. We found that the hesitant behavior is influenced by an interpersonal relationship under enough distance to predict other movement. The hesitant behavior has possibly emerged as an undesired by-product of joint action. These results contribute to our understanding of the mechanisms of adaptive control of perception-action coupling in mutual interaction.
Purpose] Cataract is a typical age-related eye disease. As a cataract progresses, the crystalline... more Purpose] Cataract is a typical age-related eye disease. As a cataract progresses, the crystalline lens becomes hazier and visual ability deteriorates (Shinoda et al.,2009), varying in degree from slight to complete opacity and obstructing the passage of light. In many cases, severe cataracts are treated with lens implant surgery. After the surgery, visual acuity and color perception recovers in many patients (Ikeda et al., 2004; Chen & Chang 2010). On the other hand, recovery in vision after the surgery may cause hypersensitivity to visual stimuli which may worsen symptoms in migraine patients (Koyama & Kawamura 2007). In this research, we conducted a structured interview with 9 cataract patients who received lens implant surgery, regarding visual comfort and discomfort after the surgery. Although intraocular lens improved vision and QOL of the patients, but some patients stimuli due to their improved vision the hypersensitivity following intraocular lens-implant surgery in patients...
We examined the readability of Japanese text presented on a large electronic-paper display (font ... more We examined the readability of Japanese text presented on a large electronic-paper display (font size: 48mm 48mm), which is expected to be used as digital signage in public space. First, the appropriate line and character spacing was examined using the method of paired comparison. We changed the spacing between the lines or characters (100%, 75%, 50%, 25%, and 0% of the character size) and asked the participants to evaluate the readability of the text on the electronic paper. The results showed that the horizontally-written text on the electronic paper was the most readable when the line spacing was 50% or 75% of the character size and the character spacing was 25%. The vertically-written text was most readable with 50% or 75% line spacing and 0% or 25% character spacing. Secondly, we conducted an experiment in order to estimate the appropriate display duration. The participants were asked to read 240 characters, which were written horizontally or vertically on the electronic paper,...
This study is to research the human's color selection of the architectural facade and human c... more This study is to research the human's color selection of the architectural facade and human consideration when selecting the color of it. As a result, " Ratio of the color selecting " has the tendency when surrounding color's tone and selecting one are same. " Degree of consideration in surrounding " and " Degree of harmony after color selecting " have the tendency which is relation in the Saturation. " Difficulty in the color selecting " is in the brightness. There seems to be a different tendency between light tone and any others in " Degree of consideration in surrounding " and " Satisfaction after color selection " .
The introduction of Japanese manga to Indonesia has triggered a big impact toward the community, ... more The introduction of Japanese manga to Indonesia has triggered a big impact toward the community, a proof of the successful intercultural reception. One notable aspect is the increasing number of young Indonesian readers who begin imitating the drawing style commonly found in the manga into their own. It is argued that the positive perception of manga has persuaded the Indonesian young readers to shape their behavior that trigger the phenomenon. Based on textual analysis, we investigated the phenomenon by relating it with the social cognitive theories on behavior change, self-efficacy, cartoon and sequential art, human visual information processing, visual language and manga visual storytelling. Using the causal model of behavior change from the Social Cognitive Theory, we argued the phenomenon is the end result of bidirectional interaction between personal determinants, environmental determinants and behavioral determinants. The perception of manga visual which inspired the readers and their self-efficacy in imitating the visual style acts as the personal determinants. Manga’s capability to deeply engage its readers would contribute as the environmental determinants. These factors would influence the behavioral determinants which resulted in the imitation of manga visual. Furthermore, this paper is also aimed to provide a robust theoretical foundation for further studies related to perception within media of sequential art.
Acquired higher brain dysfunction is for the most part due to cerebral vascular disease, but epil... more Acquired higher brain dysfunction is for the most part due to cerebral vascular disease, but epilepsy may also be a cause. In this study with five patients, we discuss the advantages of anti-epileptic drugs (AEDs) for persistent higher brain dysfunction. The patients showed chronic amnesia or acute aphasia, with associated symptoms like personality change. All five cases affected automatism or convulsive attack, though only after the emergence of higher brain dysfunction and administration of AEDs. There were underlying diseases like cerebral arteriovenous malformation in four cases, but the other patient had none. Electroencephalogram and single photon emission computed tomography revealed one case of aphasia epilepsy with higher brain dysfunction. These results suggest the potential therapeutic efficacy of AEDs for persistent higher brain dysfunction, and we must differentiate epilepsy with higher brain dysfunction from dementia or cerebral vascular disease.
Cerebral dyschromatopsia is traditionally evaluated by color discrimination tests such as the Far... more Cerebral dyschromatopsia is traditionally evaluated by color discrimination tests such as the Farnsworth-Maunsell 100 Hue Test. These tests are also used to evaluate color-perception deficits caused by eye disease, and they do not tell us whether color perception is impaired in the eye or in the brain. Here, we used color afterimage to isolate color-perception deficits in the brain from those in the eyes, in a patient with cerebral dyschromatopsia. The results showed that the patient perceived color afterimage of yellow and blue with abnormal duration and chromaticity. On the other hand, the patient performed normally on the Farnsworth-Maunsell 100 Hue Test. We conclude that the color afterimage test would be useful to evaluate color perception in the brain.
Altering physical actions when responding to changing environmental demands is important but not ... more Altering physical actions when responding to changing environmental demands is important but not always effectively performed. This ineffectiveness, which is an error of social behavior generated by mutual interactions, is not well understood. This study investigated mechanisms of a hesitant behavior that occurs in people walking toward each other, causing people to move in the same direction when attempting to avoid a collision. Using a motion capture device affixed to 17 pairs, we first confirmed the hesitant behavior by a difference between the experimental task, which involved an indeterminate situation to assess the actions of another individual, and the control task, which involved a predetermined avoiding direction, in a real-time situation involving two people. We next investigated the effect of three external factors: long distance until an event, synchronized walking cycle, and different foot relations in dyads on the hesitant behavior. A dramatic increase in freezing and near-collision behavior occurred in dyads for which the avoiding direction was not predetermined. The behavior related with the combination of long distance until an event, synchronized walking cycle, and different foot relations in dyads. We found that the hesitant behavior is influenced by an interpersonal relationship under enough distance to predict other movement. The hesitant behavior has possibly emerged as an undesired by-product of joint action. These results contribute to our understanding of the mechanisms of adaptive control of perception-action coupling in mutual interaction.
Purpose] Cataract is a typical age-related eye disease. As a cataract progresses, the crystalline... more Purpose] Cataract is a typical age-related eye disease. As a cataract progresses, the crystalline lens becomes hazier and visual ability deteriorates (Shinoda et al.,2009), varying in degree from slight to complete opacity and obstructing the passage of light. In many cases, severe cataracts are treated with lens implant surgery. After the surgery, visual acuity and color perception recovers in many patients (Ikeda et al., 2004; Chen & Chang 2010). On the other hand, recovery in vision after the surgery may cause hypersensitivity to visual stimuli which may worsen symptoms in migraine patients (Koyama & Kawamura 2007). In this research, we conducted a structured interview with 9 cataract patients who received lens implant surgery, regarding visual comfort and discomfort after the surgery. Although intraocular lens improved vision and QOL of the patients, but some patients stimuli due to their improved vision the hypersensitivity following intraocular lens-implant surgery in patients...
We examined the readability of Japanese text presented on a large electronic-paper display (font ... more We examined the readability of Japanese text presented on a large electronic-paper display (font size: 48mm 48mm), which is expected to be used as digital signage in public space. First, the appropriate line and character spacing was examined using the method of paired comparison. We changed the spacing between the lines or characters (100%, 75%, 50%, 25%, and 0% of the character size) and asked the participants to evaluate the readability of the text on the electronic paper. The results showed that the horizontally-written text on the electronic paper was the most readable when the line spacing was 50% or 75% of the character size and the character spacing was 25%. The vertically-written text was most readable with 50% or 75% line spacing and 0% or 25% character spacing. Secondly, we conducted an experiment in order to estimate the appropriate display duration. The participants were asked to read 240 characters, which were written horizontally or vertically on the electronic paper,...
This study is to research the human's color selection of the architectural facade and human c... more This study is to research the human's color selection of the architectural facade and human consideration when selecting the color of it. As a result, " Ratio of the color selecting " has the tendency when surrounding color's tone and selecting one are same. " Degree of consideration in surrounding " and " Degree of harmony after color selecting " have the tendency which is relation in the Saturation. " Difficulty in the color selecting " is in the brightness. There seems to be a different tendency between light tone and any others in " Degree of consideration in surrounding " and " Satisfaction after color selection " .
The introduction of Japanese manga to Indonesia has triggered a big impact toward the community, ... more The introduction of Japanese manga to Indonesia has triggered a big impact toward the community, a proof of the successful intercultural reception. One notable aspect is the increasing number of young Indonesian readers who begin imitating the drawing style commonly found in the manga into their own. It is argued that the positive perception of manga has persuaded the Indonesian young readers to shape their behavior that trigger the phenomenon. Based on textual analysis, we investigated the phenomenon by relating it with the social cognitive theories on behavior change, self-efficacy, cartoon and sequential art, human visual information processing, visual language and manga visual storytelling. Using the causal model of behavior change from the Social Cognitive Theory, we argued the phenomenon is the end result of bidirectional interaction between personal determinants, environmental determinants and behavioral determinants. The perception of manga visual which inspired the readers and their self-efficacy in imitating the visual style acts as the personal determinants. Manga’s capability to deeply engage its readers would contribute as the environmental determinants. These factors would influence the behavioral determinants which resulted in the imitation of manga visual. Furthermore, this paper is also aimed to provide a robust theoretical foundation for further studies related to perception within media of sequential art.
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Papers by Shinichi Koyama