Makoto Uji

Makoto Uji
RIKEN Center for Brain Science · Cognitive Somnology RIKEN Hakubi Research Team

PhD

About

21
Publications
2,118
Reads
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79
Citations
Introduction
My research interest is understanding how the human brain integrates perceptual, cognitive, and motor information to produce and control our movements. I have applied non-invasive neuroimaging methods (EEG, fMRI, simultaneous EEG-fMRI) to study human brain function. I am deeply interested in using these neuroimaging techniques to better understand the spatiotemporal dynamics of human neural networks.
Additional affiliations
September 2019 - March 2022
Concordia University Montreal
Position
  • PostDoc Position
Description
  • Horizon Postdoctoral Fellowship in Multimodal Neuroimaging of Sleep and Cognition. Developing and evaluating advanced multimodal neuroimaging methods using simultaneous EEG-fMRI or EEG-NIRS, analysing functional connectivity and brain network analysis.
December 2017 - August 2019
University of St Andrews
Position
  • PostDoc Position
Description
  • As a Research Fellow in the School of Psychology and Neuroscience at the University of St Andrews, my work has been to examine the underlying mechanisms of human 3D depth perception/3D vision using psychophysics, EEG and fMRI experiments.
April 2016 - November 2017
University of Birmingham
Position
  • Fellow
Description
  • As a postdoctoral research fellow in School of Psychology at the University of Birmingham, I have been investigating the dynamic functions of human brain with simultaneous EEG-fMRI methods.
Education
September 2011 - March 2016
Liverpool John Moores University
Field of study
  • Sensorimotor learning

Publications

Publications (21)
Article
Background The relationship between task-related hemodynamic activity and brain excitability is poorly understood in humans as it is technically challenging to combine simultaneously non-invasive brain stimulation and neuroimaging modalities. Cortical excitability corresponds to the readiness to become active and as such it may be linked to metabol...
Article
Full-text available
Sleep deprivation (SD) leads to impairments in cognitive function. Here, we tested the hypothesis that cognitive changes in the sleep-deprived brain can be explained by information processing within and between large-scale cortical networks. We acquired functional magnetic resonance imaging (fMRI) scans of 20 healthy volunteers during attention and...
Preprint
Full-text available
Background: The relationship between task-related hemodynamic activity and brain excitability is poorly understood in humans as it is technically challenging to combine simultaneously non-invasive brain stimulation and neuroimaging modalities. Cortical excitability corresponds to the readiness to become active and as such it may be linked to metabo...
Article
Full-text available
In the present study, we proposed and evaluated a workflow of personalized near infra-red optical tomography (NIROT) using functional near-infrared spectroscopy (fNIRS) for spatiotemporal imaging of cortical hemodynamic fluctuations. The proposed workflow from fNIRS data acquisition to local 3D reconstruction consists of: (a) the personalized optim...
Poster
Full-text available
Simultaneous recording of EEG and fMRI is a very promising non-invasive neuroimaging technique, providing a wide range of complementary information to characterize underlying mechanisms associated with brain functions. However, EEG data obtained from the simultaneous EEG-fMRI recordings are strongly influenced by MRI related artefacts, namely gradi...
Data
Simultaneous recording of electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) is a very promising non-invasive neuroimaging technique. However, EEG data obtained from the simultaneous EEG–fMRI are strongly influenced by MRI-related artefacts, namely gradient artefacts (GA) and ballistocardiogram (BCG) artefacts. When compa...
Article
Full-text available
Simultaneous recording of electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) is a very promising non-invasive neuroimaging technique. However, EEG data obtained from the simultaneous EEG–fMRI are strongly influenced by MRI-related artefacts, namely gradient artefacts (GA) and ballistocardiogram (BCG) artefacts. When compa...
Preprint
Sleep deprivation (SD) leads to impairments in cognitive function. Here, we tested the hypothesis that cognitive changes in the sleep-deprived brain can be explained by information processing within and between large-scale cortical networks. We acquired functional magnetic resonance imaging (fMRI) scans of 20 healthy volunteers during attention and...
Preprint
Full-text available
Simultaneous recording of EEG and fMRI is a very promising non-invasive neuroimaging technique, providing a wide range of complementary information to characterize underlying mechanisms associated with brain functions. However, EEG data obtained from the simultaneous EEG-fMRI recordings are strongly influenced by MRI related artefacts, namely gradi...
Article
Full-text available
Viewing a real scene or a stereoscopic image (e.g., 3D movies) with both eyes yields a vivid subjective impression of object solidity, tangibility, immersive negative space and sense of realness; something that is not experienced when viewing single pictures of 3D scenes normally with both eyes. This phenomenology, sometimes referred to as stereops...
Article
Full-text available
The subjective phenomenology associated with stereopsis, of solid tangible objects separated by a palpable negative space, is conventionally thought to be a by-product of the derivation of depth from binocular disparity. However, the same qualitative impression has been reported in the absence of disparity, e.g., when viewing pictorial images monoc...
Preprint
Full-text available
Viewing a real scene or a stereoscopic image (e.g. 3D movies) with both eyes yields a vivid subjective impression of object solidity, tangibility, immersive negative space and sense of realness; something that is not experienced when viewing single pictures of 3D scenes normally with both eyes. This phenomenology, sometimes referred to as stereopsi...
Preprint
Full-text available
s The subjective phenomenology associated with stereopsis, of solid tangible objects separated by a palpable negative space, is conventionally thought to be a by-product of the derivation of depth from binocular disparity. However, the same qualitative impression has been reported in the absence of disparity, e.g., when viewing pictorial images mon...
Article
Full-text available
Motivated by recent findings of improved perceptual processing and perceptual-motor skill following stroboscopic vision training, the current study examined the performance and acquisition effects of stroboscopic vision methods that afford a different visual experience. In Experiment 1, we conducted a within-subject design study to examine performa...
Article
When human observers estimate the time-to-contact (TTC) of more than one object there is an asymmetric pattern of error consistent with prioritizing the lead object at the expense of the trail object. Here, we examined TTC estimation in a prediction motion task where two objects moved along horizontal trajectories (5 or 7.5 °/s) that had different...
Article
Full-text available
We established an optimal combination of EEG recording during sparse multiband (MB) fMRI that preserves high-resolution, whole-brain fMRI coverage while enabling broad-band EEG recordings which are uncorrupted by MRI gradient artefacts (GAs). We first determined the safety of simultaneous EEG recording during MB fMRI. Application of MB factor = 4 p...
Article
Full-text available
We compared coincidence-anticipation performance in normal vision and stroboscopic vision as a function of time-on-task. Participants estimated the arrival time of a real object that moved with constant acceleration (-0.7, 0, +0.7 m/s2) in a pseudo-randomised order across 4 blocks of 30 trials in both vision conditions, received in a counter-balanc...
Conference Paper
Full-text available
Introduction: Multiband (MB) fMRI can provide shorter repetition times (TR), increased brain coverage [1,2], or shorter acquisition time in sparse fMRI which extends "quiet periods". Sparse MBfMRI has potential for improving simultaneous EEG recordings where residual gradient artefacts typically obscure gamma frequency neural activity [3,4]. This s...
Conference Paper
Full-text available
We establish a methodology for optimal combination of simultaneous EEG recording with sparse multiband fMRI that preserves high resolution, whole brain fMRI coverage with broad-band EEG signal measurement uncorrupted by MR gradient artefacts. We demonstrate the ability of this approach to record gamma frequency (>50Hz) EEG signals, that are usually...
Article
Full-text available
Increased involuntary arm movement deviation when observing an incongruent human arm movement has been interpreted as a strong indicator of motor contagion. Here, we examined the contribution of trajectory and end-point information on motor contagion by altering congruence between the stimulus and arm movement. Participants performed cyclical horiz...

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Projects

Project (1)
Project
This project will enable us to develop and evaluate methods dedicated to the analysis of multimodal neuroimaging data for sleep studies: (i) simultaneous EEG-fMRI, and (2) simultaneous EEG-NIRS, including the analysis of functional connectivity and brain network analysis as working with Dr Christophe Grova and Dr Thanh Dang Vu at Concordia University in Montreal, Canada. Fellowship Description: https://www.concordia.ca/sgs/postdoctoral-fellows/funding/horizon/descriptions/5007.html Horizon Postdoc Profiles https://www.concordia.ca/sgs/postdoctoral-fellows/funding/horizon/postdoc-profiles.html#u Horizon Postdoctoral Fellowships https://www.concordia.ca/sgs/postdoctoral-fellows/funding/horizon.html