|(830) 783-1753||çéå®æ||è¨æ¸¬æ³è¡åè³ããå®é¨ã¢ãã«ç¥çµç§å¦ç¥çµå¿çå¦èªç¥èª²é¡èªçºè³æ³¢support vector machine regressionneuro-feedbackmind-wanderingmachine learningelectroencephalogram|
Kawashima I, Kumano H. Front Hum Neurosci. 2017 Jul 12;11:365. doi: 10.3389/fnhum.2017.00365. eCollection 2017.
Mind-wandering (MW), task-unrelated thought, has been examined by researchers in an increasing number of articles using models to predict whether subjects are in MW, using numerous physiological variables. However, these models are not applicable in general situations. Moreover, they output only binary classification. The current study suggests that the combination of electroencephalogram (EEG) variables and non-linear regression modeling can be a good indicator of MW intensity. We recorded EEGs of 50 subjects during the performance of a Sustained Attention to Response Task, including a thought sampling probe that inquired the focus of attention. We calculated the power and coherence value and prepared 35 patterns of variable combinations and applied Support Vector machine Regression (SVR) to them. Finally, we chose four SVR models: two of them non-linear models and the others linear models; two of the four models are composed of a limited number of electrodes to satisfy model usefulness. Examination using the held-out data indicated that all models had robust predictive precision and provided significantly better estimations than a linear regression model using single electrode EEG variables. Furthermore, in limited electrode condition, non-linear SVR model showed significantly better precision than linear SVR model. The method proposed in this study helps investigations into MW in various little-examined situations. Further, by measuring MW with a high temporal resolution EEG, unclear aspects of MW, such as time series variation, are expected to be revealed. Furthermore, our suggestion that a few electrodes can also predict MW contributes to the development of neuro-feedback studies.
|Use of Multichannel Near Infrared Spectroscopy to Study Relationships Between Brain Regions and Neurocognitive Tasks of Selective/Divided Attention and 2-Back Working Memory.||çéå®æ||è¡åè³ããå®é¨ç¥çµå¿çå¦ãã®ä»perceptionnear-infrared spectroscopylearning and memorydichotic listeningcognitionauditory perceptionattention/distraction2-back task|
Tomita N, Imai S, Kanayama Y, Kawashima I, Kumano H. Percept Mot Skills. 2017 Jun;124(3):703-720. doi: 10.1177/0031512517700054. Epub 2017 Mar 27.
While dichotic listening (DL) was originally intended to measure bottom-up selective attention, it has also become a tool for measuring top-down selective attention. This study investigated the brain regions related to top-down selective and divided attention DL tasks and a 2-back task using alphanumeric and Japanese numeric sounds. Thirty-six healthy participants underwent near-infrared spectroscopy scanning while performing a top-down selective attentional DL task, a top-down divided attentional DL task, and a 2-back task. Pearson's correlations were calculated to show relationships between oxy-Hb concentration in each brain region and the score of each cognitive task. Different brain regions were activated during the DL and 2-back tasks. Brain regions activated in the top-down selective attention DL task were the left inferior prefrontal gyrus and left pars opercularis. The left temporopolar area was activated in the top-down divided attention DL task, and the left frontopolar area and left dorsolateral prefrontal cortex were activated in the 2-back task. As further evidence for the finding that each task measured different cognitive and brain area functions, neither the percentages of correct answers for the three tasks nor the response times for the selective attentional task and the divided attentional task were correlated to one another. Thus, the DL and 2-back tasks used in this study can assess multiple areas of cognitive, brain-related dysfunction to explore their relationship to different psychiatric and neurodevelopmental disorders.
|oversharpness||æ£æ¨å®æ||ããç·èª¬éåççå¦ç¥çµç§å¦motor controlperformance monitoringmovement preparationevent-related potentialsmotor learning|
æ¸èªï¼ J Phys Fitness Sports Med ,2012
Masaki H. & Sommer W. (2012). J Phys Fitness Sports Med, 1(3): 369-380. AbstractÂ Â In this review, focus is given to the cognitive brain functions associated with motor learning and the control of learned motor behavior, as revealed by non-invasive studies in humans. After providing a definition of motor control and learning, the tasks adopted in previous studies are first introduced, and some important findings about motor behavior and pertinent theoretical models are described. Relying mainly on findings from the event-related potential (ERP) technique, but also from neuroimaging, this review focuses on motor learning and motor control in skilled action, with an emphasis on movement preparation and performance monitoring. Keywords : event-related potentials, motor control, motor learning, movement preparation,Â performance monitoring
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æ¸èªï¼ ç¬¬27åæ¥æ¬äººå·¥ç¥è½å¦ä¼å ¨å½å¤§ä¼ ,2013
ç°åè¾»å¯æ, å°å³¶ä¸æ, æ¾å± è¾°åï¼è¦åºã¨ææ¡ä½ã®æ©è½ã«çç®ããä¸æ°å³ã®è°·çºçã¡ã«ããºã ã®ã¢ãã«åã®è©¦ã¿, ç¬¬27åæ¥æ¬äººå·¥ç¥è½å¦ä¼å ¨å½å¤§ä¼ 2F1-2 (2013)
Abstract:In the research ï¬eld of Human-Computer Interaction, the uncanny valley is a critical issue in designing anÂ appropriate appearance of a humanlike agent. Although human familiarity toward an agent increases as the agentÂ gets more similar to human, it drastically decreases to the bottom of a valley when the agent is considerably similarÂ to real human. An agent highly similar to human is ï¬rst perceived as a human and subsequently as a non-human.Â We propose a model of how possible a conï¬ict of these information occurs, based on the dual-pathway of emotionÂ and the function of the amygdala. According to the model, the conï¬ict can the most likely occur where an agentÂ looks highly but imperfectly human.
|è¢ä½ä¸èªç±ãä¼´ãç²ããè ã«å¯¾ããã³ãã¥ãã±ã¼ã·ã§ã³æ¯æ´æ©å¨ã®è©¦ä½||ç å±±åæ||éå®³ããå®é¨éå®³ç§å¦ã³ãã¥ãã±ã¼ã·ã§ã³è¢ä½ä¸èªç±æ¯æ´æè¡ç²ãã|
ç å±±åæã»æ¬éä¸ç§ã»æ¸¡è¾ºå´å²ã»ç¦ç°æåï¼2014ï¼è¢ä½ä¸èªç±ãä¼´ãç²ããè ã«å¯¾ããã³ãã¥ãã±ã¼ã·ã§ã³æ¯æ´æ©å¨ã®è©¦ä½ï¼ç¬¬29åãªãå·¥å¦ã«ã³ãã¡ã¬ã³ã¹è¬æ¼äºç¨¿é
|Simple method to reduce the effect of patient positioning variation on three-dimensional motion analysis during treadmill gait||æå²¡æ ¶è£||è¨æ¸¬æ³ããå®é¨çä½å·¥å¦æ©è¡åæè³åä¸éåå¦ç¿è¨åºè¨æ¸¬|
æ¸èªï¼ Clinics and Practice , 2013
S.Tanabe, E.Saitoh, K.Ohtsuka, T.Teranishi, Y.Tomita, and Y.Muraoka, 2013. Simple methodÂ to reduce the effect of patient positioning variation on three-dimensional motion analysisÂ during treadmill gait. Vol.3, No.2, 84-86
Recently, three-dimensional (3D) closedÂ curve trajectories of markers placed at strategic body locations, calledÂ cyclograms orÂ Lissajous-like graphs, are used for treadmillÂ gait analysis. A simple method is presented toÂ reduce the effect of patient positioning variation. After breaking down movement into threeÂ components (anterior-posterior, medial-lateralÂ and superior-inferior), the time-series dataÂ and time-inverted data are serially concatenated. A fast Fourier transform (FFT) is done, andÂ a high-pass filter (except 0 Hz) is applied toÂ the anterior-posterior and medial-lateral components. Next an inverse FFT is executed, andÂ the posterior half of the outcome, corresponding to time-inverted data, is deleted. The 3DÂ closed curve is then reconstructed. ResultsÂ showed that the proposed method was able toÂ reduce the effect of patient positioning variation. Since the adjusted curve is simply a symbolized gait pattern, the method might be useful as an adjunct tool in observational gaitÂ analysis.
|ç¥èç²å¾ã¢ãã«ã¨ãã¦ã®èªå·±çµç¹åãããï¼é£ç¶é³å£°ããã®æå¸«ãªãé³ç´ ä½ç³»ã®å¦ç¿ï¼||èæ± è±æ||å¯¾è©±ã¢ãã«è¨èªå¦æ å ±ç§å¦é³é»ç²å¾é³é¿çµ±è¨åæ|
æ¸èªï¼ æ¥æ¬ç¥è½æ å ±ãã¡ã¸ã£å¦ä¼è«æèª(ãç¥è½ã¨æ å ±ãï¼ ,2014
å®®æ¾¤ å¹¸å¸, ç½å¢ å½©å, é¦¬å¡ ããå, èæ± è±æ, "ç¥èç²å¾ã¢ãã«ã¨ãã¦ ã®èªå·±çµç¹åãããï¼é£ç¶é³å£°ããã®æå¸«ãªãé³ç´ ä½ç³»ã®å¦ç¿ï¼", æ¥æ¬ç¥è½æ å ±ãã¡ã¸ã£å¦ä¼è«æèª(ãç¥è½ã¨æ å ±ãï¼, vol.26, no.1ï¼pp.510-520ï¼2014ï¼
äººã®ç¥èç²å¾ã®ããã»ã¹ãè¨ç®è«çã«æ¤è¨¼ããç®çã§ï¼å¤§è³ç®è³ªæè¦éã®æ å ±å¦çãæ¨¡æ¬ããèªå·±çµç¹åããããç¨ããããï¼æ¬è«æã®ç®çã¯ï¼èªå·±çµç¹åããããç¨ãã¦ï¼äººã®ä¹³å ãæ¯å½èªã®é³ç´ ä½ç³»ãç²å¾ããéç¨ãè¨ç®è«çã«è§£æãããã¨ã§ããï¼å è¡ç ç©¶ã§ã¯èªç¶ãªå ¥åä¿¡å·ã®åå¸ç¹æ§ï¼é³ç´ ã®åºç¾é »åº¦ããã¬ã¼ã æ°ï¼ãååã«èæ ®ããã¦ããªãã£ãï¼æ¬ç ç©¶ã§ã¯ï¼èªç¶ãªé£ç¶é³å£°ãå ¥åã¨ãã¦ã·ãã¥ã¬ã¼ã·ã§ã³å®é¨ãè¡ãªã£ãï¼å®é¨ã®çµæï¼100ç§ç¨åº¦ã®æ¥æ¬èªã®é£ç¶é³å£°ããï¼5%ï¼/u/ï¼ï½92%ï¼/s/ï¼ã®ç²¾åº¦ã§é³ç´ ä½ç³»ãç²å¾å¯è½ã§ãããã¨ãç¤ºãããï¼
|4045871830||æ¾å± è¾°å||æè¦è³ã·ã¹ãã éçºã¢ãã«æè¦å¿çå¦æ å ±ç§å¦ä¸æ°å³ã®è°·ææ¡ä½|
æ¸èªï¼ The 1st International Conference on Human-Agent Interaction , 2013
Yoshimasa TAWATSUJI, Keiichi MURAMATSU, Kazuaki KOJIMA, Tatsunori MATSUI: Explanation for Human Sensitive Response to a Humanlike Agent Focusing on Amygdalar Function, The 1st International Conference on Human-Agent Interaction, II-p20 (2013)
Abstract:The uncanny valley is a critical issue in the research eld of Human-Computer Interaction. In the human information processing, an agent highly similar to a real human is rstÂ perceived as a human and subsequently as a non-human. The dual-pathway of emotion can pro-
vide an explanation for this two human processes to the agent, and the inconsistency of processedÂ information, human and non-human, can cause the occurrence of the uncanny valley. We proposeÂ a model of how possible the inconsistency occurs, based on the dual-pathway of emotion and theÂ function of the amygdala. According to the model, the inconsistency can the most likely occurÂ where an agent looks highly but imperfectly human.
|(251) 868-6011||æ¾å± è¾°å||æè¦è³ããã¢ãã«å®é¨æè¦å¿çå¦æ å ±ç§å¦èªç¥èª²é¡ç®ã®å½¢æ çç¹å¾´ã·ãã¥ã¬ã¼ã·ã§ã³ææ¡ä½ä¸æ°å³ã®è°·å®æ§è¡¨ç¾|
æ¸èªï¼ ç¬¬71åå é²çå¦ç¿ç§å¦ã¨å·¥å¦ç ç©¶ä¼ , 2014
ç°åè¾»å¯æ, ææ¾æ ¶ä¸, æ¾å± è¾°åï¼å®æ§è¡¨ç¾ãç¨ããäººåã¨ã¼ã¸ã§ã³ãã®ç®ã®å½¢æ çç¹å¾´ãäººéã®æ åç¶æ ã«ä¸ããå½±é¿ã®çè«çæ¤è¨, ç¬¬71åå é²çå¦ç¿ç§å¦ã¨å·¥å¦ç ç©¶ä¼, B401-4, pp.17-22 (2014)
Abstract: Designing the agents extraordinarily humanlike sometimes makes humans elicit aÂ negative feeling against it. It is well known as the uncanny valley. We proposed the modelÂ generating how the feeling occurs based on human brain function related to emotions. However,Â the model was defective in its emotional information processing for the inputs, the features ofÂ the agents' eye. In this study we propose the advanced model to express the human information
processing toward them. The results of simulation indicated that a little detection of abnormalityÂ of the eye in the early but imprecise information processing caused the agent to be low-evaluated,Â and that agent should be negatively evaluated if human kept on gazing at an abnormality point.
|ã¹ãã¼ããã©ã³ãç¨ããä½ã³ã¹ãçé»å³ãã¤ãªãã£ã¼ãããã¯è£ ç½®ã®éçº||æå²¡æ ¶è£||ã·ã¹ãã éçºè¨æ¸¬æ³çä½å·¥å¦çé»è³åä¸éåå¦ç¿åæå¥ä¸éå®³|
æ¸èªï¼ ç·åãªãããªãã¼ã·ã§ã³ ,2014
æå²¡æ ¶è£ã2014ãã¹ãã¼ããã©ã³ãç¨ããä½ã³ã¹ãçé»å³ãã¤ãªãã£ã¼ãããã¯è£ ç½®ã®éçºã ç·åãªãããªãã¼ã·ã§ã³ã Vol.42ãNo.2ã 161-164
å¯¾è©±é³å£°ã¨ããã»ã¼ã·ã¹å¦ã Â å¸å·ãç¹ ãããã»ã¼ã·ã¹å¦ã®è«¸ç¸ãæ£®æ¬ä¸èª ãç¥ç°åå¹¸ç·¨èãç¬¬1ç« æè¦ç³»ãããããæ¯æ´ãã¦ããªã³ãã¬ã¹, pp.55-66, (2014.ï¼)
æ¸èªï¼ Medical science digest ,2013
Abstract: æºå¸¯åãã¤ãªãã£ã¼ãããã¯æ©è½ä»ä½å¨æ³¢æ²»çå¨ã§ããéæéåä»å©åé»æ°åºæ¿è£ ç½®ï¼Integrated Volitionalcontrol Electrical Stimulator: IVESï¼ã¯ï¼ãã®éçºãã10å¹´ã®æ³æãçµã¦å¸è²©åããããæ¬ç¨¿ã§ã¯ï¼å¸å°ãªå½ç£å»çæ©å¨ã§ããIVESã®æã¤æ§ã ãªæ©è½ãå¹æï¼å¿ç¨ä¾ãªã©ã«ã¤ãã¦è¿°ã¹ããKeywords: : ãã¤ãªãã£ã¼ãããã¯ï¼ä½å¨æ³¢æ²»çå¨ï¼è³åä¸ï¼æ²»ççé»æ°åºæ¿TES
|ææ ã®äºéçµè·¯ã«ãããè³æ©è½ã«çç®ããä¸æ°å³ã®è°·çºçã¡ã«ããºã ã®ã¢ãã«åã®è©¦ã¿||æ¾å± è¾°å||ã·ã¹ãã éçºæè¦è³ããã¢ãã«å®é¨æè¦å¿çå¦æ å ±ç§å¦èªç¥èª²é¡ææ¡ä½ä¸æ°å³ã®è°·ææ ã®äºéçµè·¯|
æ¸èªï¼ã ç¬¬67åäººå·¥ç¥è½å¦ä¼å é²çå¦ç¿ç§å¦ã¨å·¥å¦ç ç©¶ä¼ ,2013
ç°åè¾»å¯æ, å°å³¶ä¸æ, æ¾å± è¾°å: ææ ã®äºéçµè·¯ã«ãããè³æ©è½ã«çç®ããä¸æ°å³ã®è°·çºçã¡ã«ããºã ã®ã¢ãã«åã®è©¦ã¿, ç¬¬67åäººå·¥ç¥è½å¦ä¼å é²çå¦ç¿ç§å¦ã¨å·¥å¦ç ç©¶ä¼ (2013)
Abstract:Â For designing the rounded communication between humans and agents, humanlikeÂ appearance of agents can contribute to human understandibility toward its intension. However,Â the excessive humanlikeness can cause human to feel repulsive against agent, which is well knownÂ as the uncanny valley. In this study we propose the model indicating how the human negativeÂ response occurs, based on the brain regions and its functions, including the amygdala, cortex and
hippocampus. This model is discribled with quantitative reasoning. The results indicate that asÂ human observes a humanlike agent, the emotional response goes negative and the brain regionsÂ were more activated in comparison with the case human observes a person.
|Learning phonemic vowel length from naturalistic recordings of Japanese infantdirected speech||èæ± è±æ||å¯¾è©±çºéã¢ãã«è¨èªå¦æ å ±ç§å¦é³é»ç²å¾é³é¿çµ±è¨åæ|
æ¸èªï¼ PLoS One ,2013
Ricardo Augusto Hoffmann BIONï¼MIYAZAWA Koukiï¼KIKUCHIÂ Hideakiï¼MAZUKA Reikoï¼âLearning phonemic vowel length from naturalistic recordings ofÂ Japanese infantdirected speechâï¼PLoSÂ Oneï¼vol.8ï¼no.2ï¼pp.e51594ï¼2013
In Japanese, vowel duration can distinguish the meaning of words. In order for infants to learn this phonemic contrast usingÂ simple distributional analyses, there should be reliable differences in the duration of short and long vowels, and theÂ frequency distribution of vowels must make these differences salient enough in the input. In this study, we evaluate theseÂ requirements of phonemic learning by analyzing the duration of vowels from over 11 hours of Japanese infant-directedÂ speech. We found that long vowels are substantially longer than short vowels in the input directed to infants, for each of theÂ five oral vowels. However, we also found that learning phonemic length from the overall distribution of vowel duration isÂ not going to be easy for a simple distributional learner, because of the large base-rate effect (i.e., 94% of vowels are short),Â and because of the many factors that influence vowel duration (e.g., intonational phrase boundaries, word boundaries, andÂ vowel height). Therefore, a successful learner would need to take into account additional factors such as prosodic andÂ lexical cues in order to discover that duration can contrast the meaning of words in Japanese. These findings highlight theÂ importance of taking into account the naturalistic distributions of lexicons and acoustic cues when modeling earlyÂ phonemic learning.
|Changes in cortical excitability during and just before motor imagery||æå²¡æ ¶è£||çä½ããå®é¨ççå¦çä½å·¥å¦çé»lateralizationmotor evoked potentialtranscranial magnetic stimulationexcitabilitymotor imagery|
æ¸èªï¼ TokaiÂ J Exp Clin Med , 2013
Aono K, Kodama M, Masakado Y, Muraoka Y. (2013). Tokai J Exp Clin Med. 20;38(1):1-6. Objective: Changes in cortical excitability during motor imagery were investigated in order to reveal the effect of hand dominance. During motor imagery, motor evoked potentials (MEPs) were recorded from the first dorsal interosseous (FDI) muscle of the dominant hand using transcranial magnetic stimulation (TMS). Methods: Twelve healthy right-handed subjects participated. Three motor imagery tasks (MITs) were provided; dominant hand grasping, non-dominant hand grasping, and ankle dorsiflexion ipsilateral to the dominant hand. MEPs were also recorded from the FDI muscle of the non-dominant hand during the same tasks. Result: MEPs increased significantly in the dominant hand during MIT, just before MIT of the dominant hand, and prior to ankle dorsiflexion ipsilateral to the dominant hand. MEPs obtained from the FDI muscle of the dominant hand during MITs were greater than that obtained from the FDI muscle of the non-dominant hand. However, this difference was not significant. Conclusion: The left primary motor cortex (M1) was more excited than M1 during MITs of the hand muscles. Cortical excitability increased just before MIT of the contralateral hand and leg muscles. Key words: cortical excitability, motor imagery, transcranial magnetic stimulation, motor evoked potential, LateralizationÂ
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æ¸èªï¼ æ¥æ¬ä¿å¥ç§å¦å¦ä¼èª ,2013
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æ¸èªï¼ èªç¶ è¨èªå¦ç ,2014
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