岡山大学大学院ヘルスシステム統合科学研究科Acta Medica Okayama2436-322752025イノベーションループの実践：2024年度先進病院実習報告と未来課題3945ENNahokoHARADAAcademic Field of Interdisciplinary Science and Engineering in Health Systems Health Sciences, Okayama universitySatoshiTAKAHASHIAcademic Field of Interdisciplinary Science and Engineering in Health Systems Health Sciences, Okayama universityTomoakiMORIAcademic Field of Interdisciplinary Science and Engineering in Health Systems Health Sciences, Okayama universityHarukaHIKASAAcademic Field of Interdisciplinary Science and Engineering in Health Systems Health Sciences, Okayama universityKeisukeSHISHIDOAcademic Field of Interdisciplinary Science and Engineering in Health Systems Health Sciences, Okayama universityMasakiMAGARIAcademic Field of Interdisciplinary Science and Engineering in Health Systems Health Sciences, Okayama universityToyohikoWATANABEAcademic Field of Interdisciplinary Science and Engineering in Health Systems Health Sciences, Okayama universityJinWangAcademic Field of Interdisciplinary Science and Engineering in Health Systems Health Sciences, Okayama universityMizukiMORITAAcademic Field of Interdisciplinary Science and Engineering in Health Systems Health Sciences, Okayama university10.18926/interdisciplinary/68625No potential conflict of interest relevant to this article was reported.American Physiological SocietyActa Medica Okayama0022-307712752022Tactile angle discriminability improvement: contributions of working memory training and continuous attended sensory input13981406ENWuWangSchool of Psychological and Cognitive Sciences, Peking UniversityJiajiaYangGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYinghuaYuGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityHuazhiLiGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYulongLiuGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYiyangYuGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityJiabinYuCollege of Information Engineering, China Jiliang UniversityXiaoyuTangSchool of Psychology, Liaoning Collaborative Innovation Center of Children and Adolescents Healthy Personality Assessment and Cultivation, Liaoning Normal UniversityJingjingYangSchool of Computer Science and Technology, Changchun University of Science and TechnologySatoshiTakahashiGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYoshimichiEjimaGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityJinglongWuGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityPerceptual learning is commonly assumed to enhance perception through continuous attended sensory input. However, learning is generalizable to performance in untrained stimuli and tasks. Although previous studies have observed a possible generalization effect across tasks as a result of working memory (WM) training, comparisons of the contributions of WM training and continuous attended sensory input to perceptual learning generalization are still rare. Therefore, we compared which factors contributed most to perceptual generalization and investigated which skills acquired during WM training led to tactile generalization across tasks. Here, a Braille-like dot pattern matching n-back WM task was used as the WM training task, with four workload levels (0, 1, 2, and 3-back levels). A tactile angle discrimination (TAD) task was used as a pre- and posttest to assess improvements in tactile perception. Between tests, four subject groups were randomly assigned to four different workload n-back tasks to consecutively complete three sessions of training. The results showed that tactile n-back WM training could enhance TAD performance, with the 3-back training group having the highest TAD threshold improvement rate. Furthermore, the rate of WM capacity improvement on the 3-back level across training sessions was correlated with the rate of TAD threshold improvement. These findings suggest that continuous attended sensory input and enhanced WM capacity can lead to improvements in TAD ability, and that greater improvements in WM capacity can predict greater improvements in TAD performance.<br>
NEW & NOTEWORTHY Perceptual learning is not always specific to the trained task and stimuli. We demonstrate that both continuous attended sensory input and improved WM capacity can be used to enhance tactile angle discrimination (TAD) ability. Moreover, WM capacity improvement is important in generalizing the training effect to the TAD ability. These findings contribute to understanding the mechanism of perceptual learning generalization across tasks.No potential conflict of interest relevant to this article was reported.Springer Science and Business Media LLCActa Medica Okayama0014-481924032022Global surface features contribute to human haptic roughness estimations773789ENHuazhiLiGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityJiajiaYangGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYinghuaYuGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityWuWangSchool of Psychological and Cognitive Sciences, Peking UniversityYulongLiuGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityMengniZhouGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityQingqingLiDepartment of Teacher Education, Wenzhou UniversityJingjingYangSchool of Computer Science and Technology, Changchun University of Science and TechnologyShipingShaoSchool of Social Welfare, Yonsei UniversitySatoshiTakahashiGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYoshimichiEjimaGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityJinglongWuGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityPrevious studies have paid special attention to the relationship between local features (e.g., raised dots) and human roughness perception. However, the relationship between global features (e.g., curved surface) and haptic roughness perception is still unclear. In the present study, a series of roughness estimation experiments was performed to investigate how global features affect human roughness perception. In each experiment, participants were asked to estimate the roughness of a series of haptic stimuli that combined local features (raised dots) and global features (sinusoidal-like curves). Experiments were designed to reveal whether global features changed their haptic roughness estimation. Furthermore, the present study tested whether the exploration method (direct, indirect, and static) changed haptic roughness estimations and examined the contribution of global features to roughness estimations. The results showed that sinusoidal-like curved surfaces with small periods were perceived to be rougher than those with large periods, while the direction of finger movement and indirect exploration did not change this phenomenon. Furthermore, the influence of global features on roughness was modulated by local features, regardless of whether raised-dot surfaces or smooth surfaces were used. Taken together, these findings suggested that an object’s global features contribute to haptic roughness perceptions, while local features change the weight of the contribution that global features make to haptic roughness perceptions.No potential conflict of interest relevant to this article was reported.MDPIActa Medica Okayama2076-341711152021A New Method for Haptic Shape Discriminability Detection7049ENYulongLiuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityJiajiaYangCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYinghuaYuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYiyangYuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityWuWangThe School of Psychological and Cognitive Sciences, Peking UniversityHuazhiLiCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversitySatoshiTakahashiCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYoshimichiEjimaCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityQiongWuDepartment of Psychology, Suzhou University of Science and Technology,JinglongWuResearch Center for Medical Artificial Intelligence, Shenzhen Institute of Advanced Technology, Chinese Academy of SciencesTouch shape discrimination is not only closely related to tactile mechanoreceptors but also higher cognitive function. However, previous shape discrimination methods are difficult to complete in a short time, and the devices are complicated to operate and not user-friendly for nonprofessionals. Here, we propose a new method, the evaluation quantity of which is the angle discrimination threshold. In addition, to make this method easy to use for nonprofessionals, we designed a haptic angle sorting system, including the device and software. To evaluate this method, the angle sorting and two-angle discrimination experiments were compared, and it was found that participants spent significantly less time in the former experiment than in the latter. At the same time, there is a strong correlation between the performance of angle sorting and two-angle discrimination, which shows that the angle threshold obtained by the new method can also be used to evaluate the ability of touch discrimination. Moreover, the angle sorting results of different age groups also further demonstrate the feasibility of the method. The efficiency of this new method and the effectiveness of the system also provide a convenient means for evaluating haptic shape discrimination, which may have potential clinical application value in the early diagnosis of peripheral neuropathy and even in the evaluation of cognitive function.No potential conflict of interest relevant to this article was reported.SAGE PublicationsActa Medica Okayama2041-66951162020Semantic Congruency Modulates the Effect of Attentional Load on the Audiovisual Integration of Animate Images and Sounds2041669520981096ENQingqingLiCognitive Neuroscience Laboratory, Graduate School of Natural Science and Technology, Okayama UniversityQiongWuDepartment of Psychology, Suzhou University of Science and TechnologyYiyangYuCognitive Neuroscience Laboratory, Graduate School of Natural Science and Technology, Okayama UniversityFengxiaWuCognitive Neuroscience Laboratory, Graduate School of Natural Science and Technology, Okayama UniversitySatoshiTakahashiCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYoshimichiEjimaCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityJiajiaYangCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityJinglongWuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityAttentional processes play a complex and multifaceted role in the integration of input from different sensory modalities. However, whether increased attentional load disrupts the audiovisual (AV) integration of common objects that involve semantic content remains unclear. Furthermore, knowledge regarding how semantic congruency interacts with attentional load to influence the AV integration of common objects is limited. We investigated these questions by examining AV integration under various attentional-load conditions. AV integration was assessed by adopting an animal identification task using unisensory (animal images and sounds) and AV stimuli (semantically congruent AV objects and semantically incongruent AV objects), while attentional load was manipulated by using a rapid serial visual presentation task. Our results indicate that attentional load did not attenuate the integration of semantically congruent AV objects. However, semantically incongruent animal sounds and images were not integrated (as there was no multisensory facilitation), and the interference effect produced by the semantically incongruent AV objects was reduced by increased attentional-load manipulations. These findings highlight the critical role of semantic congruency in modulating the effect of attentional load on the AV integration of common objects.No potential conflict of interest relevant to this article was reported.American Physiological SocietyActa Medica Okayama0022-307712252019Tactile angle discriminability improvement: roles of training time intervals and different types of training tasks19181927ENWuWangGraduate School of Natural Science and Technology, Okayama UniversityJiajiaYangGraduate School of Interdisciplinary Science and Engineering in Health Systems, OkayamaQiongWuGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityJiabinYu Graduate School of Natural Science and Technology, Okayama UniversitySatoshiTakahashiGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityYoshimichiEjimaGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityJinglongWuGraduate School of Interdisciplinary Science and Engineering in Health Systems, Okayama UniversityPerceptual learning, which is not limited to sensory modalities such as vision and touch, emerges within a training session and between training sessions and is accompanied by the remodeling of neural connections in the cortex. However, limited knowledge exists regarding perceptual learning between training sessions. Although tactile studies have paid attention to between-session learning effects, there have been few studies asking fundamental questions regarding whether the time interval between training sessions affects tactile perceptual learning and generalization across tactile tasks. We investigated the effects of different training time intervals on the consecutive performance of a tactile angle discrimination (AD) task and a tactile orientation discrimination (OD) task training on tactile angle discriminability. The results indicated that in the short-interval training group, AD task performance significantly improved in the early stage of learning and nearly plateaued in the later stage, whereas in the long-interval training group, significant improvement was delayed and then also nearly plateaued in the later stage; additionally, improved OD task performance resulted in improved AD task performance. These findings suggest that training time interval affects the early stage of learning but not the later stage and that generalization occurs between different types of tactile tasks.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama2405-8440582019Stroking hardness changes the perception of affective touch pleasantness across different skin sitese02141ENJiabinYuCognitive Neuroscience Laboratory, Graduate School of Natural Science and Technology, Okayama UniversityJiajiaYangCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityYinghuaYuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityQiongWuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversitySatoshiTakahashiCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityYoshimichiEjimaCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityJinglongWuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityHuman unmyelinated tactile afferents (CT afferents) in hairy skin are thought to be involved in the transmission of affective aspects of touch. How the perception of affective touch differs across human skin has made substantial progress; however, the majority of previous studies have mainly focused on the relationship between stroking velocities and pleasantness ratings. Here, we investigate how stroking hardness affects the perception of affective touch. Affective tactile stimulation was given with four different hardness of brushes a three different forces, which were presented to either palm or forearm. To quantify the physical factors of the stimuli (brush hardness), ten naive, healthy participants assessed brush hardness using a seven-point scale. Based on these ten participants, five more participants were added to rate the hedonic value of brush stroking using a visual analogue scale (VAS). We found that pleasantness ratings over the skin resulted in a preference for light, soft stroking, which was rated as more pleasant when compared to heavy, hard stroking. Our results show that the hairy skin of the forearm is more susceptible to stroking hardness than the glabrous of the palm in terms of the perception of pleasantness. These findings of the current study extend the growing literature related to the effect of stroking characteristics on pleasantness ratings.No potential conflict of interest relevant to this article was reported.ElsevierActa Medica Okayama24058440582019Stroking hardness changes the perception of affective touch pleasantness across different skin sitese02141ENJiabinYuCognitive Neuroscience Laboratory, Graduate School of Natural Science and Technology, Okayama UniversityJiajiaYangCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityYinghuaYuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityQiongWuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversitySatoshiTakahashiCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityYoshimichiEjimaCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityJinglongWuCognitive Neuroscience Laboratory, Graduate School of Interdisciplinary, Science and Engineering in Health Systems, Okayama UniversityHuman unmyelinated tactile afferents (CT afferents) in hairy skin are thought to be involved in the transmission of affective aspects of touch. How the perception of affective touch differs across human skin has made substantial progress; however, the majority of previous studies have mainly focused on the relationship between stroking velocities and pleasantness ratings. Here, we investigate how stroking hardness affects the perception of affective touch. Affective tactile stimulation was given with four different hardness of brushes at three different forces, which were presented to either palm or forearm. To quantify the physical factors of the stimuli (brush hardness), ten naïve, healthy participants assessed brush hardness using a seven-point scale. Based on these ten participants, five more participants were added to rate the hedonic value of brush stroking using a visual analogue scale (VAS). We found that pleasantness ratings over the skin resulted in a preference for light, soft stroking, which was rated as more pleasant when compared to heavy, hard stroking. Our results show that the hairy skin of the forearm is more susceptible to stroking hardness than the glabrous of the palm in terms of the perception of pleasantness. These findings of the current study extend the growing literature related to the effect of stroking characteristics on pleasantness ratings.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama12682005Intermolecular-medium and intramolecular-weak hydrogen bonding chains in the crystals of chiral trifluoromethylated amino alcohols11341139ENToshimasaKatagiriYasuyukiFujiwaraSatoshiTakahashiKenjiUneyama<p>A structural feature of hydrogen bonding chains found in the crystals of trifluoromethylated amino alcohols is reported. Hydrogen bondings of 3-(N,N-dialkylamino)-1,1,1-trifluoro-2-propanols construct chiral spiral hydrogen bonding chains. Lone pairs on the nitrogen atoms of the amino alcohols participate in two hydrogen bondings. Detailed structural analysis of the hydrogen bonds of the 3-(N,N-dimethylamino)-1,1,1-trifluoro-2-propanol suggested that the chain built up with alternating intermolecular medium and intramolecular weak hydrogen bonds. The medium intermolecular hydrogen bond, which transfers a proton from the hydroxy group to the amino nitrogen, would make a tentative zwitterionic form of the molecule. Then, electrostatic attraction between the charges in the zwitterion centers induced a weak intramolecular hydrogen bond.</p>No potential conflict of interest relevant to this article was reported.Faculty of Engineering, Okayama UniversityActa Medica Okayama0475-00713311998Measurement of saturated solubilities and diffusion coefficients of pure gases to mineral oil1930ENSeiichiWashioSatoshiTakahashiChikashiImotoAtsumasaYoshida10.18926/19608The present paper deals with measurements of the diffusion coefficients as well as the saturated solubilities of single component gases such as N(2), O(2) and CO(2) to a mineral oil. The method to determine the diffusivity is based upon measuring the pressure changes caused by the one-dimensional diffusion between the gas and the oil enclosed in an airtight container. For N(2) and O(2) the profiles of the measured pressure changes agree well with those predicted by diffusion theory, whereas that is not the case with CO(2). Although the reason why CO(2) does not seem to obey diffusion theory has yet to be studied, it may suggest the possibility that the diffusion coefficient varies with the pressure, considering that the range of pressure change in the diffusivity measurement was much obtained by this method fell within ±30% around the average. Moreover the solubility measurements have made clear that Henry's law holds true between the three pure gases and the oils tested, and that O(2) and CO(2) dissolve into the oil approximately two and ten times more, respectively, than N(2).No potential conflict of interest relevant to this article was reported.岡山大学理学部地球科学教室Acta Medica Okayama1340-7414712000船舶を用いた海面乱流フラックスの自動観測114ENSatoshiTakahashiOsamuTsukamotoHiroshiIshidaKunioYoneyama10.18926/ESR/13891Sea surface eddy fluxes were evaluated with the eddy correlation method including ship motion correction for the wind vector components. Previous ship motion correction algorithm was revised as a simple scheme setting a motion sensor at the same place with the sonic anemometer. This revised eddy flux system was mounted as a routine continuous measurement system on the R/V 'Mirai' of Japan Marine Science and Technology Center.
The first cruise was conducted at the tropical weatern Pacific in June 2000. Continuous sea surface fluxes were obtained and the data quality was checked with some parameters. This system is planned to be developed as a automated data processing system including ship motion correction and real-time flux evaluation system. These eddy fluxes can be integrated with the bulk fluxes and radiation fluxes to understand sea surface heat balance over the global ocean.No potential conflict of interest relevant to this article was reported.Acta Medica Okayama2006Study on Hydrogen Bonding Systems of Trifluorolactates for Crystal EngineeringENSatoshiTakahashiNo potential conflict of interest relevant to this article was reported.Acta Medica Okayama2005海面上における乱流フラックスリアルタイム観測システムの開発に関する研究ENSatoshiTakahashiNo potential conflict of interest relevant to this article was reported.Acta Medica Okayama2001油における気体の拡散問題の研究ENNo potential conflict of interest relevant to this article was reported.