Search results for: Kayako Matsuo

Items from 1 to 20 out of 39 results

article

Stable signatures of schizophrenia in the cortical–subcortical–cerebellar network using fMRI of verbal working memory

Kayako Matsuo, Shen-Hsing Annabel Chen, Chih-Min Liu, Chen-Chung Liu, more

Schizophrenia Research > 2013 > 151 > 1-3 > 133-140

A dysfunction in working memory (WM) is a core cognitive impairment in schizophrenia that involves the cortical–subcortical–cerebellar network. We propose that in addition to other often-referred markers, the signal reduction in the network during verbal working memory (VWM) is a stable and intrinsic indicator of illness. We presented a Sternberg VWM task to 46 patients with schizophrenia and 46 healthy...

article

AveLI: A robust lateralization index in functional magnetic resonance imaging using unbiased threshold-free computation

Kayako Matsuo, Shen-Hsing Annabel Chen, Wen-Yih Isaac Tseng

Journal of Neuroscience Methods > 2012 > 205 > 1 > 119-129

The laterality index (LI) is often applied in functional magnetic resonance imaging (fMRI) studies to determine functional hemispheric lateralization. A difficulty in using conventional LI methods lies in ensuring a legitimate computing procedure with a clear rationale. Another problem with LI is dealing with outliers and noise. We propose a method called AveLI that follows a simple and unbiased computational...

article

Extensive stimulus repetition leads older adults to show delayed functional magnetic resonance imaging adaptation

Makoto Miyakoshi, S.-H. Annabel Chen, Kayako Matsuo, Chiao-Yi Wu, more

Brain Imaging and Behavior > 2012 > 6 > 3 > 357-365

We investigated whether extensive repetition can diminish age-related differences between younger and older adults in functional magnetic resonance adaptation (fMR-A). Datasets were obtained from 26 younger and 24 older healthy adults presented with two scenes that repeated 20 times amongst other novel scenes during fMRI scanning. The average cortical responses to the first eight (Repetitions 1-7)...

article

Neural substrates of phonological selection for Japanese character Kanji based on fMRI investigations

Kayako Matsuo, Shen-Hsing Annabel Chen, Chih-Wei Hue, Chiao-Yi Wu, more

NeuroImage > 2010 > 50 > 3 > 1280-1291

Japanese and Chinese both share the same ideographic/logographic character system. How these characters are processed, however, is inherently different for each language. We harnessed the unique property of homophone judgment in Japanese kanji to provide an analogous Chinese condition using event-related functional magnetic resonance imaging (fMRI) in 33 native Japanese speakers. We compared two types...

article

A Vision for Translating Neuroimaging Techniques into Clinical Applications through Collaboration

Shen-Hsing Annabel Chen, Wen-Yih Isaac Tseng, Toshiharu Nakai, Epifanio Bagarinao, more

Brain Imaging and Behavior > 2008 > 2 > 4 > 350-358

Through the advancement of non-invasive neuroimaging techniques, functional brain imaging research has gained widespread acceptance and increased clinical applications. In Taiwan, similar advances are also emerging, particularly in the integration of multi-modal neuroimaging. However, due to the relative limited local resources and infrastructure desirable for such an endeavor to flourish, we have...

article

BAX: A Toolbox for the Dynamic Analysis of Functional MRI Datasets

Epifanio Bagarinao, Kayako Matsuo, Toshiharu Nakai, Yoshio Tanaka

Neuroinformatics > 2008 > 6 > 2 > 109-115

We developed a toolbox called BAX (brain activation explorer) for the dynamic analysis of functional magnetic resonance imaging (fMRI) datasets using the general linear model. The toolbox provides a graphical user interface where several routines can be accessed to extract different sets of information from a given series of functional images. The dynamic analysis can be implemented using either an...

article

Subregions of human parietal cortex selectively encoding object orientation

Toshihiko Aso, Takashi Hanakawa, Kayako Matsuo, Keiichiro Toma, more

Neuroscience Letters > 2007 > 415 > 3 > 225-230

Computation of object orientation could be an independent process from those of other object features, but currently neither the location of human brain areas selectively coding orientation information nor an optimum experimental paradigm have yet been established. In this study, functional magnetic resonance imaging was used to investigate brain activation in the parietal cortices related to object...

article

Dynamic monitoring of brain activation under visual stimulation using fMRI—The advantage of real-time fMRI with sliding window GLM analysis

Toshiharu Nakai, Epifanio Bagarinao, Kayako Matsuo, Yuko Ohgami, more

Journal of Neuroscience Methods > 2006 > 157 > 1 > 158-167

An fMRI technique based on real-time analysis was applied to evaluate the advantages of dynamic monitoring of the t-statistics based on a general linear model. The temporal change of the t-statistics in V1 and V4 under four conditions of visual stimuli covering different visual fields with or without coloring was estimated using an incremental analysis and a sliding window analysis (SWA). The SWA...

article

Activation of the precuneus is related to reduced reaction time in serial reaction time tasks

Kenichi Oishi, Keiichiro Toma, Epifanio T. Bagarinao, Kayako Matsuo, more

Neuroscience Research > 2005 > 52 > 1 > 37-45

Multiple brain areas are activated during serial reaction time (RT) tasks (SRTTs), but the part of the brain that facilitates reductions in RT remains unclear. The present study attempted to determine the brain region contributing most to improved RTs during explicit SRTTs. Subjects comprised 18 healthy volunteers who were instructed to press one of four buttons corresponding to visual stimuli as...

article

An fMRI study of temporal sequencing of motor regulation guided by an auditory cue—a comparison with visual guidance

Toshiharu Nakai, Kayako Matsuo, Yuko Ohgami, Kenichi Oishi, more

Cognitive Processing > 2005 > 6 > 2 > 128-135

The neuronal system to process and transfer auditory information to the higher motor areas was investigated using fMRI. Two different types of internal modulation of auditory pacing (1 Hz) were combined to design a 2×2 condition experiment, and the activation was compared with that under a visual guidance. The bilateral anterior portion of the BA22 (ant-BA22) and the left BA41/42 were more extensively...

article

Implicit and explicit processing of kanji and kana words and non-words studied with fMRI

Dinh Ha Duy Thuy, Kayako Matsuo, Kimihiro Nakamura, Keiichiro Toma, more

NeuroImage > 2004 > 23 > 3 > 878-889

Using functional magnetic resonance imaging (fMRI), we investigated the implicit language processing of kanji and kana words (i.e., hiragana transcriptions of normally written kanji words) and non-words. Twelve right-handed native Japanese speakers performed size judgments for character stimuli (implicit language task for linguistic stimuli), size judgments for scrambled-character stimuli (implicit...

article

Application of independent component analysis to magnetic resonance imaging for enhancing the contrast of gray and white matter

Toshiharu Nakai, Shigeru Muraki, Epifanio Bagarinao, Yukio Miki, more

NeuroImage > 2004 > 21 > 1 > 251-260

An application of independent component analysis (ICA) was attempted to develop a method of processing magnetic resonance (MR) images to extract physiologically independent components representing tissue relaxation times and achieve improved visualization of normal and pathologic structures. Anatomical T1-weighted, T2-weighted and proton density images were obtained from 10 normal subjects, 3 patients...

article

The effect of task block arrangement on the detectability of activation in fMRI

Toshiharu Nakai, Akira Matsumura, Tadao Nose, Chikako Kato, more

Magnetic Resonance Imaging > 2003 > 21 > 9 > 941-947

The effect of task block arrangements on the detection of brain activation was investigated. Sessions of functional magnetic resonance imaging (fMRI) including the same number of two different task conditions but with different arrangements were compared. The two task conditions were, A) Ellipse-shaped black and white checkerboard flicker stimulation at 4.2 Hz covering the bilateral visual field,...

article

Finger movements lighten neural loads in the recognition of ideographic characters

Kayako Matsuo, Chikako Kato, Tomohisa Okada, Tetsuo Moriya, more

Cognitive Brain Research > 2003 > 17 > 2 > 263-272

The role of finger writing movements in recognizing Japanese ideographic characters (Kanji) was investigated using functional magnetic resonance imaging at 3 T. A total of 12 healthy native Japanese-speaking volunteers were studied while counting the number of strokes in ideographic characters. In experiment 1, a representation of the pronunciation of an ideographic character was displayed using Japanese...

article

Cortical motor areas in plantar response: an event-related functional magnetic resonance imaging study in normal subjects

Kenichi Oishi, Keiichiro Toma, Kayako Matsuo, Toshiharu Nakai, more

Neuroscience Letters > 2003 > 345 > 1 > 17-20

The role of the cerebral cortices in normal plantar response was investigated with event-related functional magnetic resonance imaging (fMRI) at 3 Tesla in 12 right-handed normal subjects. During fMRI acquisition, the lateral (LS) and medial (MS) side of the left sole was mechanically stimulated every 16 s to evoke the plantar response under monitoring of the surface electromyogram. LS activated the...

article

The role of the human supplementary motor area in reactive motor operation

Keiichiro Toma, Masahiro Ozawa, Kayako Matsuo, Toshiharu Nakai, more

Neuroscience Letters > 2003 > 344 > 3 > 177-180

The role of the supplementary motor area (SMA) in reactive motor operation was investigated with functional magnetic resonance imaging in 13 normal subjects. A visual cue was presented at a regular (1 Hz) or irregular (mean, 1 Hz) rate, and the subject pressed a button with the right index finger in a predictive or reactive manner. Brain regions associated with reactive movement were detected by comparing...

article

A functional magnetic resonance imaging study of internal modulation of an external visual cue for motor execution

Toshiharu Nakai, Chikako Kato, Gary H. Glover, Keiichiro Toma, more

Brain Research > 2003 > 968 > 2 > 238-247

The strategy to perform a task differs according to how a cue is interpreted. In order to investigate the basic mechanisms of temporal regulation in the higher motor areas, the interaction between two different types of internal modulations of an external visual cue was evaluated using functional magnetic resonance imaging (fMRI). An opposing finger movement task guided by dot prompting was employed...

article

Discrimination of Exner's area and the frontal eye field in humans - functional magnetic resonance imaging during language and saccade tasks

Kayako Matsuo, Chikako Kato, Chika Sumiyoshi, Keiichiro Toma, more

Neuroscience Letters > 2003 > 340 > 1 > 13-16

In the left frontal lobe, Exner's area (EXA), which is responsible for writing and reading, is located close to the frontal eye field (FEF), which is responsible for eye movements. To discriminate EXA from FEF anatomically and functionally, functional magnetic resonance imaging was conducted in 12 healthy volunteers. The saccadic eye movement experiment activated a region defined as the FEF, whereas...

article

Orthography effect on brain activities in the working memory process for phonologically ambiguous syllables: a functional magnetic resonance imaging study using Japanese speakers

Chika Sumiyoshi, Kayako Matsuo, Chikako Kato, Fukujirou Ozawa, more

Neuroscience Letters > 2003 > 336 > 1 > 50-54

English /l/ and /r/ sounds are not distinctive for Japanese speakers and they are loosely associated with corresponding graphemes. The purpose of this study was to investigate the brain activities in the memory process for the graphemes containing 'l' and 'r' in Japanese speakers. Two functional magnetic resonance imaging (at 1.5T) experiments was conducted using syllable working memory tasks. The...

article

Activation during endogenous orienting of visual attention using symbolic pointers in the human parietal and frontal cortices: a functional magnetic resonance imaging study

Chikako Kato, Kayako Matsuo, Masako Matsuzawa, Tetsuo Moriya, more

Neuroscience Letters > 2001 > 314 > 1-2 > 5-8

Brain activation induced by endogenous orienting with a motor response was investigated by functional magnetic resonance imaging. We conducted four cued-attention experiments in which peripheral attention was caused by one of three symbolic pointers (eyes, squares as artificial eyes, or an arrow) that was predictive or not predictive of the target location. Attentional shift caused by the predictive...

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Keywords

FMRI (8)
FUNCTIONAL MAGNETIC RESONANCE IMAGING (7)
FUNCTIONAL MAGNETIC RESONANCE IMAGING (FMRI) (4)
SUPPLEMENTARY MOTOR AREA (4)
BRAIN ACTIVATION (2)
DYNAMIC FMRI (2)
INCREMENTAL ANALYSIS (2)
KANJI (2)
OBJECT RECOGNITION (2)
PREMOTOR AREA (2)
SLIDING WINDOW ANALYSIS (2)
SUPERIOR PARIETAL LOBULE (2)
ADAPTATION (1)
AGING (1)
ASYMMETRY (1)
AUDITORY COMPREHENSION (1)
AUDITORY CUE (1)
BA22 (1)
BABINSKI SIGN (1)
BAX (1)
BLOCK DESIGN (1)
BLOOD OXYGEN LEVEL DEPENDENCY (BOLD) (1)
BRAIN NEOPLASMS (1)
CANONICALITY (1)
CEREBELLUM (1)
CHINESE CHARACTER (1)
COGNITIVE DYSMETRIA (1)
COLLABORATION (1)
CORTICAL REFLEX ARC (1)
DEFAULT MODE NETWORK (1)
DSI (1)
ECHO PLANAR IMAGING (EPI) (1)
ENDOGENOUS ORIENTING (1)
EVENT-RELATED FUNCTIONAL MAGNETIC RESONANCE IMAGING (1)
EXNER'S AREA (1)
EXPLICIT (1)
FINGER WRITING GESTURE (1)
FRONTAL EYE FIELD (1)
FUNCTIONAL MRI (1)
GAZE DIRECTION (1)
GRAPHEME (1)
GRAPHEME GENERATION (1)
GRAPHEME TO PHONEME CORRESPONDENCE (1)
GRID TECHNOLOGY (1)
HEMISPHERIC DOMINANCE (1)
HEMODYNAMIC RESPONSE (1)
HEMODYNAMIC RESPONSE FUNCTION (1)
HOMOPHONE JUDGMENT (1)
HUMAN BRAIN MAPPING (1)
IMAGE PROCESSING (1)
IMPLICIT (1)
INDEPENDENT COMPONENT ANALYSIS (ICA) (1)
INFORMATION SELECTION (1)
IRREGULAR MOVEMENT (1)
JAPANESE IDEOGRAPHIC CHARACTER (1)
JAPANESE KANJI (1)
KANA (1)
KINESTHETIC FACILITATION (1)
LANGUAGE (1)
LANGUAGE NETWORK (1)
LATERALITY INDEX (1)
LATERALIZATION (1)
LEFT LATERALIZATION (1)
LETTERS (1)
MAGNETIC RESONANCE IMAGING (MRI) (1)
MANIPULO-SPATIAL PROCESSING (1)
MEMORY RETRIEVAL (1)
MENTAL IMAGERY (1)
MIDDLE FRONTAL GYRUS (1)
MONITORING (1)
MOTOR AREA (1)
MOTOR ATTENTION (1)
MOTOR REPRESENTATION (1)
MOTOR SEQUENCE LEARNING (1)
MOTOR SEQUENCING (1)
MOVEMENT TIMING (1)
MULTI-MODAL NEUROIMAGING INTEGRATION (1)
MULTIPLE SCLEROSIS (1)
ORTHOGRAPHY (1)
PARAHIPPOCAMPUS (1)
PARALLEL COMPUTING (1)
PARIETAL CORTEX (1)
PARIETAL LOBE (1)
PERIPHERAL ATTENTION (1)
PHONEME (1)
PHONOLOGICAL PROCESSING (1)
PLANTAR RESPONSE (1)
PLANTAR STIMULATION (1)
PRE-MOTOR AREA (1)
PRECUNEUS (1)
PREDICTIVE MOVEMENT (1)
REACTION TIME (1)
REACTIVE MOVEMENT (1)
REAL-TIME FMRI (1)
REGULAR MOVEMENT (1)
REPETITION SUPPRESSION (1)
SACCADE (1)
SCENE RECOGNITION (1)
SCHIZOPHRENIA (1)
SCRAMBLED (1)
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Data set

Elsevier (35)
Springer (4)

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Search results for: Kayako Matsuo

Stable signatures of schizophrenia in the cortical–subcortical–cerebellar network using fMRI of verbal working memory

AveLI: A robust lateralization index in functional magnetic resonance imaging using unbiased threshold-free computation

Extensive stimulus repetition leads older adults to show delayed functional magnetic resonance imaging adaptation

Neural substrates of phonological selection for Japanese character Kanji based on fMRI investigations

A Vision for Translating Neuroimaging Techniques into Clinical Applications through Collaboration

BAX: A Toolbox for the Dynamic Analysis of Functional MRI Datasets

Subregions of human parietal cortex selectively encoding object orientation

Dynamic monitoring of brain activation under visual stimulation using fMRI—The advantage of real-time fMRI with sliding window GLM analysis

Activation of the precuneus is related to reduced reaction time in serial reaction time tasks

An fMRI study of temporal sequencing of motor regulation guided by an auditory cue—a comparison with visual guidance

Implicit and explicit processing of kanji and kana words and non-words studied with fMRI

Application of independent component analysis to magnetic resonance imaging for enhancing the contrast of gray and white matter

The effect of task block arrangement on the detectability of activation in fMRI

Finger movements lighten neural loads in the recognition of ideographic characters

Cortical motor areas in plantar response: an event-related functional magnetic resonance imaging study in normal subjects

The role of the human supplementary motor area in reactive motor operation

A functional magnetic resonance imaging study of internal modulation of an external visual cue for motor execution

Discrimination of Exner's area and the frontal eye field in humans - functional magnetic resonance imaging during language and saccade tasks

Orthography effect on brain activities in the working memory process for phonologically ambiguous syllables: a functional magnetic resonance imaging study using Japanese speakers

Activation during endogenous orienting of visual attention using symbolic pointers in the human parietal and frontal cortices: a functional magnetic resonance imaging study

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