Assessment of olfactory detection thresholds in children with autism spectrum disorders using a pulse ejection system / Hirokazu KUMAZAKI in Molecular Autism, 7 (2016)  

Public ISBD [article]  inMolecular Autism > 7 (2016) . - 6p. Titre : Assessment of olfactory detection thresholds in children with autism spectrum disorders using a pulse ejection system Type de document : texte imprimé Auteurs : Hirokazu KUMAZAKI, Auteur ; Taro MURAMATSU, Auteur ; Takashi X. FUJISAWA, Auteur ; Masutomo MIYAO, Auteur ; Eri MATSUURA, Auteur ; Ken-ichi OKADA, Auteur ; Hirotaka KOSAKA, Auteur ; Akemi TOMODA, Auteur ; Masaru MIMURA, Auteur Article en page(s) : 6p. Langues : Anglais (eng) Mots-clés : Adolescent  Aerosols  Autism Spectrum Disorder/physiopathology/psychology  Caproates  Case-Control Studies  Child  Diagnostic Equipment  Equipment Design  Female  Humans  Hypesthesia/etiology/physiopathology/psychology  Male  Odorants  Olfactory Perception/physiology  Pentanols  Pulsatile Flow  Sensory Thresholds/physiology  Autism spectrum disorder  Laboratory-based studies  Olfaction  Olfactory detection threshold  Pulse ejection system Index. décimale : PER Périodiques Résumé : BACKGROUND: Atypical responsiveness to olfactory stimuli has been reported as the strongest predictor of social impairment in children with autism spectrum disorders (ASD). However, previous laboratory-based sensory psychophysical studies that have aimed to investigate olfactory sensitivity in children with ASD have produced inconsistent results. The methodology of these studies is limited by several factors, and more sophisticated approaches are required to produce consistent results. METHODS: We measured olfactory detection thresholds in children with ASD and typical development (TD) using a pulse ejection system-a newly developed methodology designed to resolve problems encountered in previous studies. The two odorants used as stimuli were isoamyl acetate and allyl caproate. RESULTS: Forty-three participants took part in this study: 23 (6 females, 17 males) children with ASD and 20 with TD (6 females, 14 males). Olfactory detection thresholds of children with ASD were significantly higher than those of TD children with both isoamyl acetate (2.85 +/- 0.28 vs 1.57 +/- 0.15; p < 0.001) and allyl caproate ( 3.30 +/- 0.23 vs 1.17 +/- 0.08; p < 0.001). CONCLUSIONS: We found impaired olfactory detection thresholds in children with ASD. Our results contribute to a better understanding of the olfactory abnormalities that children with ASD experience. Considering the role and effect that odors play in our daily lives, insensitivity to some odorants might have a tremendous impact on children with ASD. Future studies of olfactory processing in ASD may reveal important links between brain function, clinically relevant behavior, and treatment. En ligne : http://dx.doi.org/10.1186/s13229-016-0071-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=328 [article] Assessment of olfactory detection thresholds in children with autism spectrum disorders using a pulse ejection system [texte imprimé] / Hirokazu KUMAZAKI, Auteur ; Taro MURAMATSU, Auteur ; Takashi X. FUJISAWA, Auteur ; Masutomo MIYAO, Auteur ; Eri MATSUURA, Auteur ; Ken-ichi OKADA, Auteur ; Hirotaka KOSAKA, Auteur ; Akemi TOMODA, Auteur ; Masaru MIMURA, Auteur . - 6p. Langues : Anglais (eng) in Molecular Autism > 7 (2016) . - 6p. Mots-clés : Adolescent  Aerosols  Autism Spectrum Disorder/physiopathology/psychology  Caproates  Case-Control Studies  Child  Diagnostic Equipment  Equipment Design  Female  Humans  Hypesthesia/etiology/physiopathology/psychology  Male  Odorants  Olfactory Perception/physiology  Pentanols  Pulsatile Flow  Sensory Thresholds/physiology  Autism spectrum disorder  Laboratory-based studies  Olfaction  Olfactory detection threshold  Pulse ejection system Index. décimale : PER Périodiques Résumé : BACKGROUND: Atypical responsiveness to olfactory stimuli has been reported as the strongest predictor of social impairment in children with autism spectrum disorders (ASD). However, previous laboratory-based sensory psychophysical studies that have aimed to investigate olfactory sensitivity in children with ASD have produced inconsistent results. The methodology of these studies is limited by several factors, and more sophisticated approaches are required to produce consistent results. METHODS: We measured olfactory detection thresholds in children with ASD and typical development (TD) using a pulse ejection system-a newly developed methodology designed to resolve problems encountered in previous studies. The two odorants used as stimuli were isoamyl acetate and allyl caproate. RESULTS: Forty-three participants took part in this study: 23 (6 females, 17 males) children with ASD and 20 with TD (6 females, 14 males). Olfactory detection thresholds of children with ASD were significantly higher than those of TD children with both isoamyl acetate (2.85 +/- 0.28 vs 1.57 +/- 0.15; p < 0.001) and allyl caproate ( 3.30 +/- 0.23 vs 1.17 +/- 0.08; p < 0.001). CONCLUSIONS: We found impaired olfactory detection thresholds in children with ASD. Our results contribute to a better understanding of the olfactory abnormalities that children with ASD experience. Considering the role and effect that odors play in our daily lives, insensitivity to some odorants might have a tremendous impact on children with ASD. Future studies of olfactory processing in ASD may reveal important links between brain function, clinically relevant behavior, and treatment. En ligne : http://dx.doi.org/10.1186/s13229-016-0071-2 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=328

Gazefinder as a clinical supplementary tool for discriminating between autism spectrum disorder and typical development in male adolescents and adults / Toru FUJIOKA in Molecular Autism, 7 (2016)  

Public ISBD [article]  inMolecular Autism > 7 (2016) . - 19p. Titre : Gazefinder as a clinical supplementary tool for discriminating between autism spectrum disorder and typical development in male adolescents and adults Type de document : texte imprimé Auteurs : Toru FUJIOKA, Auteur ; Keisuke INOHARA, Auteur ; Yuko OKAMOTO, Auteur ; Yasuhiro MASUYA, Auteur ; Makoto ISHITOBI, Auteur ; Daisuke N. SAITO, Auteur ; Matthias JUNG, Auteur ; Sumiyoshi ARAI, Auteur ; Yukiko MATSUMURA, Auteur ; Takashi X. FUJISAWA, Auteur ; Kosuke NARITA, Auteur ; Kota SUZUKI, Auteur ; Kenji J. TSUCHIYA, Auteur ; Norio MORI, Auteur ; Taiichi KATAYAMA, Auteur ; Makoto SATO, Auteur ; Toshio MUNESUE, Auteur ; Hidehiko OKAZAWA, Auteur ; Akemi TOMODA, Auteur ; Yuji WADA, Auteur ; Hirotaka KOSAKA, Auteur Article en page(s) : 19p. Langues : Anglais (eng) Mots-clés : Adolescent  Adult  Area Under Curve  Autism Spectrum Disorder/diagnosis/physiopathology  Case-Control Studies  Discriminant Analysis  Fixation, Ocular/physiology  Humans  Male  Ocular Physiological Phenomena  Photic Stimulation  Psychometrics  ROC Curve  Social Behavior  Time Factors  Autism spectrum disorder  Biological motion  Eye-tracking  Face  Fixation  Gaze abnormality  Geometry Index. décimale : PER Périodiques Résumé : BACKGROUND: Gaze abnormality is a diagnostic criterion for autism spectrum disorder (ASD). However, few easy-to-use clinical tools exist to evaluate the unique eye-gaze patterns of ASD. Recently, we developed Gazefinder, an all-in-one eye-tracking system for early detection of ASD in toddlers. Because abnormal gaze patterns have been documented in various ASD age groups, we predicted that Gazefinder might also detect gaze abnormality in adolescents and adults. In this study, we tested whether Gazefinder could identify unique gaze patterns in adolescents and adults with ASD. METHODS: We measured the percentage of eye fixation time allocated to particular objects depicted in movies (i.e., eyes and mouth in human face movies, upright and inverted biological motion in movies that presented these stimuli simultaneously, and people and geometry in movies that presented these stimuli simultaneously) by male adolescents and adults with ASD (N = 26) and age-matched males with typical development (TD; N = 35). We compared these percentages between the two groups (ASD and TD) and with scores on the social responsiveness scale (SRS). Further, we conducted discriminant analyses to determine if fixation times allocated to particular objects could be used to discriminate between individuals with and without ASD. RESULTS: Compared with the TD group, the ASD group showed significantly less fixation time at locations of salient social information (i.e., eyes in the movie of human faces without lip movement and people in the movie of people and geometry), while there were no significant groupwise differences in the responses to movies of human faces with lip movement or biological motion. In a within-group correlation analysis, a few of the fixation-time items correlated with SRS, although most of them did not. No items significantly correlated with SRS in both ASD and TD groups. The percentage fixation times to eyes and people, which exhibited large effect sizes for the group difference, could differentiate ASD and TD with a sensitivity of 81.0% and a specificity of 80.0%. CONCLUSIONS: These findings suggest that Gazefinder is potentially a valuable and easy-to-use tool for objectively measuring unique gaze patterns and discriminating between ASD and TD in male adolescents and adults. En ligne : http://dx.doi.org/10.1186/s13229-016-0083-y Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=328 [article] Gazefinder as a clinical supplementary tool for discriminating between autism spectrum disorder and typical development in male adolescents and adults [texte imprimé] / Toru FUJIOKA, Auteur ; Keisuke INOHARA, Auteur ; Yuko OKAMOTO, Auteur ; Yasuhiro MASUYA, Auteur ; Makoto ISHITOBI, Auteur ; Daisuke N. SAITO, Auteur ; Matthias JUNG, Auteur ; Sumiyoshi ARAI, Auteur ; Yukiko MATSUMURA, Auteur ; Takashi X. FUJISAWA, Auteur ; Kosuke NARITA, Auteur ; Kota SUZUKI, Auteur ; Kenji J. TSUCHIYA, Auteur ; Norio MORI, Auteur ; Taiichi KATAYAMA, Auteur ; Makoto SATO, Auteur ; Toshio MUNESUE, Auteur ; Hidehiko OKAZAWA, Auteur ; Akemi TOMODA, Auteur ; Yuji WADA, Auteur ; Hirotaka KOSAKA, Auteur . - 19p. Langues : Anglais (eng) in Molecular Autism > 7 (2016) . - 19p. Mots-clés : Adolescent  Adult  Area Under Curve  Autism Spectrum Disorder/diagnosis/physiopathology  Case-Control Studies  Discriminant Analysis  Fixation, Ocular/physiology  Humans  Male  Ocular Physiological Phenomena  Photic Stimulation  Psychometrics  ROC Curve  Social Behavior  Time Factors  Autism spectrum disorder  Biological motion  Eye-tracking  Face  Fixation  Gaze abnormality  Geometry Index. décimale : PER Périodiques Résumé : BACKGROUND: Gaze abnormality is a diagnostic criterion for autism spectrum disorder (ASD). However, few easy-to-use clinical tools exist to evaluate the unique eye-gaze patterns of ASD. Recently, we developed Gazefinder, an all-in-one eye-tracking system for early detection of ASD in toddlers. Because abnormal gaze patterns have been documented in various ASD age groups, we predicted that Gazefinder might also detect gaze abnormality in adolescents and adults. In this study, we tested whether Gazefinder could identify unique gaze patterns in adolescents and adults with ASD. METHODS: We measured the percentage of eye fixation time allocated to particular objects depicted in movies (i.e., eyes and mouth in human face movies, upright and inverted biological motion in movies that presented these stimuli simultaneously, and people and geometry in movies that presented these stimuli simultaneously) by male adolescents and adults with ASD (N = 26) and age-matched males with typical development (TD; N = 35). We compared these percentages between the two groups (ASD and TD) and with scores on the social responsiveness scale (SRS). Further, we conducted discriminant analyses to determine if fixation times allocated to particular objects could be used to discriminate between individuals with and without ASD. RESULTS: Compared with the TD group, the ASD group showed significantly less fixation time at locations of salient social information (i.e., eyes in the movie of human faces without lip movement and people in the movie of people and geometry), while there were no significant groupwise differences in the responses to movies of human faces with lip movement or biological motion. In a within-group correlation analysis, a few of the fixation-time items correlated with SRS, although most of them did not. No items significantly correlated with SRS in both ASD and TD groups. The percentage fixation times to eyes and people, which exhibited large effect sizes for the group difference, could differentiate ASD and TD with a sensitivity of 81.0% and a specificity of 80.0%. CONCLUSIONS: These findings suggest that Gazefinder is potentially a valuable and easy-to-use tool for objectively measuring unique gaze patterns and discriminating between ASD and TD in male adolescents and adults. En ligne : http://dx.doi.org/10.1186/s13229-016-0083-y Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=328

Recognition of Facial Expressions and Prosodic Cues with Graded Emotional Intensities in Adults with Asperger Syndrome / Hirokazu DOI in Journal of Autism and Developmental Disorders, 43-9 (September 2013)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 43-9 (September 2013) . - p.2099-2113 Titre : Recognition of Facial Expressions and Prosodic Cues with Graded Emotional Intensities in Adults with Asperger Syndrome Type de document : texte imprimé Auteurs : Hirokazu DOI, Auteur ; Takashi X. FUJISAWA, Auteur ; Chieko KANAI, Auteur ; Haruhisa OHTA, Auteur ; Hideki YOKOI, Auteur ; Akira IWANAMI, Auteur ; Nobumasa KATO, Auteur ; Kazuyuki SHINOHARA, Auteur Article en page(s) : p.2099-2113 Langues : Anglais (eng) Mots-clés : Facial expression  Prosody  Inversion effect  Configural processing  Asperger syndrome Index. décimale : PER Périodiques Résumé : This study investigated the ability of adults with Asperger syndrome to recognize emotional categories of facial expressions and emotional prosodies with graded emotional intensities. The individuals with Asperger syndrome showed poorer recognition performance for angry and sad expressions from both facial and vocal information. The group difference in facial expression recognition was prominent for stimuli with low or intermediate emotional intensities. In contrast to this, the individuals with Asperger syndrome exhibited lower recognition accuracy than typically-developed controls mainly for emotional prosody with high emotional intensity. In facial expression recognition, Asperger and control groups showed an inversion effect for all categories. The magnitude of this effect was less in the Asperger group for angry and sad expressions, presumably attributable to reduced recruitment of the configural mode of face processing. The individuals with Asperger syndrome outperformed the control participants in recognizing inverted sad expressions, indicating enhanced processing of local facial information representing sad emotion. These results suggest that the adults with Asperger syndrome rely on modality-specific strategies in emotion recognition from facial expression and prosodic information. En ligne : http://dx.doi.org/10.1007/s10803-013-1760-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=212 [article] Recognition of Facial Expressions and Prosodic Cues with Graded Emotional Intensities in Adults with Asperger Syndrome [texte imprimé] / Hirokazu DOI, Auteur ; Takashi X. FUJISAWA, Auteur ; Chieko KANAI, Auteur ; Haruhisa OHTA, Auteur ; Hideki YOKOI, Auteur ; Akira IWANAMI, Auteur ; Nobumasa KATO, Auteur ; Kazuyuki SHINOHARA, Auteur . - p.2099-2113. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 43-9 (September 2013) . - p.2099-2113 Mots-clés : Facial expression  Prosody  Inversion effect  Configural processing  Asperger syndrome Index. décimale : PER Périodiques Résumé : This study investigated the ability of adults with Asperger syndrome to recognize emotional categories of facial expressions and emotional prosodies with graded emotional intensities. The individuals with Asperger syndrome showed poorer recognition performance for angry and sad expressions from both facial and vocal information. The group difference in facial expression recognition was prominent for stimuli with low or intermediate emotional intensities. In contrast to this, the individuals with Asperger syndrome exhibited lower recognition accuracy than typically-developed controls mainly for emotional prosody with high emotional intensity. In facial expression recognition, Asperger and control groups showed an inversion effect for all categories. The magnitude of this effect was less in the Asperger group for angry and sad expressions, presumably attributable to reduced recruitment of the configural mode of face processing. The individuals with Asperger syndrome outperformed the control participants in recognizing inverted sad expressions, indicating enhanced processing of local facial information representing sad emotion. These results suggest that the adults with Asperger syndrome rely on modality-specific strategies in emotion recognition from facial expression and prosodic information. En ligne : http://dx.doi.org/10.1007/s10803-013-1760-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=212

Sex differences in cognitive and symptom profiles in children with high functioning autism spectrum disorders / Hirokazu KUMAZAKI in Research in Autism Spectrum Disorders, 13-14 (May 2015)  

Public ISBD [article]  inResearch in Autism Spectrum Disorders > 13-14 (May 2015) . - p.1-7 Titre : Sex differences in cognitive and symptom profiles in children with high functioning autism spectrum disorders Type de document : texte imprimé Auteurs : Hirokazu KUMAZAKI, Auteur ; Taro MURAMATSU, Auteur ; Hirotaka KOSAKA, Auteur ; Takashi X. FUJISAWA, Auteur ; Kazuhiko IWATA, Auteur ; Akemi TOMODA, Auteur ; Kenji TSUCHIYA, Auteur ; Masaru MIMURA, Auteur Article en page(s) : p.1-7 Langues : Anglais (eng) Mots-clés : High functioning autism spectrum disorders  Sex differences  Narrow age range  Before adolescence  CARS-TV  Taste, Smell, Touch Response and Use Index. décimale : PER Périodiques Résumé : Abstract Although a small number of studies have investigated sex differences in the associated features of high-functioning autism spectrum disorders (HFASDs), they have failed to provide consistent findings. We sought to examine sex differences in 5–9-year-old females and males with HFASDs within a narrow range of ages before adolescence in order to identify the noticeable autistic profile of females compared to males. Using the Japanese version of the Wechsler Intelligence Scale for Children-Third Edition (WISC-III) and the Childhood Autism Rating Scale-Tokyo Version (CARS-TV), 20 females with HFASDs were compared with 26 males with HFASDs. Although females and males with HFASDs share similar cognitive profiles in WISC-III, females demonstrated a different symptom profile from males in CARS-TV. Although the female subjects scored significantly lower than the male subjects on “Body Use,” “Object Use,” and “Activity Level,” female subjects scored significantly higher than males on “Taste, Smell, and Touch Response and Use” in the CARS-TV. This finding can be useful for the early identification of females with HFASDs who have typically been underdiagnosed. Future research should focus on elucidating the possible behavioral, neurological, and genetic links to these sex differences. En ligne : http://dx.doi.org/10.1016/j.rasd.2014.12.011 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=260 [article] Sex differences in cognitive and symptom profiles in children with high functioning autism spectrum disorders [texte imprimé] / Hirokazu KUMAZAKI, Auteur ; Taro MURAMATSU, Auteur ; Hirotaka KOSAKA, Auteur ; Takashi X. FUJISAWA, Auteur ; Kazuhiko IWATA, Auteur ; Akemi TOMODA, Auteur ; Kenji TSUCHIYA, Auteur ; Masaru MIMURA, Auteur . - p.1-7. Langues : Anglais (eng) in Research in Autism Spectrum Disorders > 13-14 (May 2015) . - p.1-7 Mots-clés : High functioning autism spectrum disorders  Sex differences  Narrow age range  Before adolescence  CARS-TV  Taste, Smell, Touch Response and Use Index. décimale : PER Périodiques Résumé : Abstract Although a small number of studies have investigated sex differences in the associated features of high-functioning autism spectrum disorders (HFASDs), they have failed to provide consistent findings. We sought to examine sex differences in 5–9-year-old females and males with HFASDs within a narrow range of ages before adolescence in order to identify the noticeable autistic profile of females compared to males. Using the Japanese version of the Wechsler Intelligence Scale for Children-Third Edition (WISC-III) and the Childhood Autism Rating Scale-Tokyo Version (CARS-TV), 20 females with HFASDs were compared with 26 males with HFASDs. Although females and males with HFASDs share similar cognitive profiles in WISC-III, females demonstrated a different symptom profile from males in CARS-TV. Although the female subjects scored significantly lower than the male subjects on “Body Use,” “Object Use,” and “Activity Level,” female subjects scored significantly higher than males on “Taste, Smell, and Touch Response and Use” in the CARS-TV. This finding can be useful for the early identification of females with HFASDs who have typically been underdiagnosed. Future research should focus on elucidating the possible behavioral, neurological, and genetic links to these sex differences. En ligne : http://dx.doi.org/10.1016/j.rasd.2014.12.011 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=260

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