MOMOSE, Keiko

Publish Classification：Research paper(bulletin of university, research institution) ISSN：18825176

Publish Classification：Research paper (scientific journal) ISSN：1664-1078

Outline：:This study examines the early development of cultural differences in a simple, embodied, and intersubjective engagement between mothers putting down, picking up, and carrying their infants between Japan and Scotland. Eleven Japanese and ten Scottish mothers with their 6- and then 9-month-old infants participated. Video and motion analyses were employed to measure motor patterns of the mothers' approach to their infants, as well as their infants' collaborative responses during put-down, pick-up, and carry phases. Japanese and Scottish mothers approached their infants with different styles and their infants responded differently to the short duration of separation during the trial. A greeting-like behavior of the arms and hands was prevalent in the Scottish mothers' approach, but not in the Japanese mothers' approach. Japanese mothers typically kneeled before making the final reach to pick-up their children, giving a closer, apparently gentler final approach of the torso than Scottish mothers, who bent at the waist with larger movements of the torso. Measures of the gap closure between the mothers' hands to their infants' heads revealed variably longer duration and distance gap closures with greater velocity by the Scottish mothers than by the Japanese mothers. Further, the sequence of Japanese mothers' body actions on approach, contact, pick-up, and hold was more coordinated at 6 months than at 9 months. Scottish mothers were generally more variable on approach. Measures of infant participation and expressivity indicate more active participation in the negotiation during the separation and pick-up phases by Scottish infants. Thus, this paper demonstrates a culturally different onset of development of joint attention in pick-up. These differences reflect cultures of everyday interaction.

Publish Classification：Research paper (scientific journal) ISSN：1347-443X

Outline：Stochastic resonance (SR) is a phenomenon whereby detection of sub-threshold signal is improved by additive background noise in nonlinear systems. It has been unclear how this phenomenon is affected by the characteristics of background noise. In this paper, we investigate the effects of background noise characteristics on information transmission in a realistic hippocampal CA1 neuron model, i. e., the effect of input locations of the background noise and the influence of power spectra of the background noise. Using the computer simulation, the random sub-threshold input signal generated by a filtered homogeneous Poisson process was applied to a distal portion of the apical dendrite, while the background noise having a 1/fβ(β=0, 1, 2) power spectrum generated by a fractional integration was further applied to a variable location to investigate the effects of background noise input location on information transmission. Our results showed that SR was observed as the information rate reached a maximum value for optimal noise amplitude. The results also showed that the background noise input location and the coefficient β did not alter the maximum information rate generated by SR. The noise amplitude required to the maximum information rate increased when the noise input location was set at distal or the coefficient β was approached to zero from two. It is concluded that the variance of the noise having a frequency component of less than 200 Hz can play a key role in the information processing of sub-threshold signal transmission in the hippocampus.

Publish Classification：Research paper (scientific journal) ISSN：04534654

Publish Classification：Research paper (scientific journal)

Publish Classification：Research paper (scientific journal)

International conferencePoster presentationVenue：Berlin

International conferencePoster presentationVenue：Hawaii

Outline： Event-related potentials (ERPs) to dynamic face expression were measured and investigated the effect of facial movement on face- and emotion-sensitive ERP components (N170 and LPP). Similar N170 components to static face stimuli were obtained in the right temporal area and their amplitudes were dependent on the time length of the facial movements. Large late positive potentials after 300 ms are obtained at centro-parietal area, and this component may reflect the impression of naturalness of face expression.

International conferencePoster presentation

Outline： Pupil diameter changes during presenting the visual stimulus was measured, and there relation to subjective interest values to the stimuli was investigated. Visual stimuli was 10 product photos of clothes, shoes, and bouquet. Principal component analysis was applied to pupil diameter changes measured from 33 participants and the relationship between principal component score and subjective interest values was evaluated. Results showed that 10th principal component score was difference among interest values, and the component vector included the sinusoidal changes around 0.5 Hz.

National conferenceOral presentation(general)Venue：Kokubunji， Tokyo

Outline： Gaze behaviors of post-lingual deafened adults in multi-party conversation were investigated. Conversations were video- recorded from three groups (CIL: four adults with cochlear implants, and three of them feel difficulty in conducting conversation, CIH: four adults with cochlear implants who do not feel difficulty in conducting conversation, N: four normal-hearing adults). Each person’s gaze behaviors and utterance was detected from recorded videos. Mean normalized duration of gazing at the current speaker was longer in CIL and CIH than in N group. Shorter duration of the current speaker’s gazing at the previous speaker was observed in N group, but shorter gazing at the next speaker in CIL and CIH groups. This difference may be due to that participants’ difficulty in conducting conversation in CIL and CIH groups.

National conferenceOral presentation(general)Venue：Sendai, Japan

Outline： Noninvasive methods for probing direction-selective neuronal activity are effective for understanding human motion perception. Some previous works demonstrated that phase of the Steady-state Visual Evoked Potential (SSVEP) reflect the direction-specific neural activity (Ales & Norcia, 2009). We have also reported that phase of SSVEP related to direction of illusory visual motion (motion aftereffect, and reverse phi) (Momose, Yakovleva, & Norcia, 2014, Momose & Arimitsu, 2016). Here we present a method that reveals motion mechanisms directly through a signature predicted by the motion energy model, and discuss the utility of SSVEP.

International conferencePoster presentationVenue：Osaka

International conferencePoster presentationVenue：Orlando, FL

Outline： The effect of spatial and temporal frequency on direction specific response in steady-state visual evoked potential (SSVEP) was investigated. 64-channel SSVEPs were recorded during test stimulus of oscillating vertical sinusoidal grating (0.5 or 2 c/deg, 4 or 9 Hz) with/without motion adaptation. Fundamental frequency (1F) component was extracted from the SSVEP of each condition by using Fourier analysis. The phase of 1F component under right-adaptation in occipital and occipito-temporal area was shifted by 90-180 degrees from that under left-adaptation, agreeing with the previous studies. The different phase-shift dependency on MAE direction between 4 Hz and 9 Hz stimuli were obtained, and the dependency was more typical in 0.5 c/deg. This result implies that there are two or more different motion detectors with different temporal sensitivity.

Venue：Milan

Venue：Nagoya

Oral presentation(general)

Poster presentation

Poster presentation

Poster presentation

Oral presentation(general)

Poster presentation

International conferencePoster presentation

Poster presentation

Poster presentation

Oral presentation(general)

Poster presentation

International conferenceOral presentation(general)

International conferencePoster presentation