Search results for: Tatsuya Mima

Items from 1 to 20 out of 102 results

article

Gait‐combined transcranial alternating current stimulation modulates cortical control of muscle activities during gait

Ryosuke Kitatani, Satoko Koganemaru, Ayaka Maeda, Yusuke Mikami, more

European Journal of Neuroscience > 52 > 12 > 4791 - 4802

Non‐invasive brain stimulation has been of interest as a therapeutic tool to modulate cortical excitability. However, there is little evidence that oscillatory brain stimulation can modulate the cortical control of muscle activities during gait, which can be assessed using coherence analysis of paired surface electromyographic (EMG) recordings. This study aimed to investigate the effects of gait‐combined...

article

The effect of illusionary perception on mismatch negativity (MMN): An electroencephalography study

Kentaro Ono, Daiki Yamasaki, Christian F. Altmann, Tatsuya Mima

Hearing Research > 2017 > 356 > C > 87-92

Mismatch negativity (MMN) is a unique brain response elicited by any discernible change of features in a tone sequence. Although the occurrence of MMN is dependent upon the difference of a stimulus parameter, such as frequency or intensity, recent studies have suggested that MMN occurs as a result of a comparison between an internal representation created by perception and an incoming tone. The present...

article

P298 Can music enhance movement intention?

Yoshie Nakajima, Tatsuya Mima, Yoshiyuki Tadokoro

Clinical Neurophysiology > 2017 > 128 > 9 > e273

Active participation of patients themselves in rehabilitation is a vital factor for the stroke recovery. Since music can create positive emotion and sometimes trigger spontaneous movements, such as dancing, combination of music and rehabilitation might be beneficial in improving patients’ mental and physical functions. To clarify the influence of music on human movement intention and to establish...

article

Effects of vestibular rehabilitation combined with transcranial cerebellar direct current stimulation in patients with chronic dizziness: An exploratory study

Satoko Koganemaru, Fumiyuki Goto, Miki Arai, Keitaro Toshikuni, more

Brain Stimulation > 2017 > 10 > 3 > 576-578

Vestibular rehabilitation is useful to alleviate chronic dizziness in patients with vestibular dysfunction. It aims to induce neuronal plasticity in the central nervous system (especially in the cerebellum) to promote vestibular compensation. Transcranial cerebellar direct current stimulation (tcDCS) reportedly enhances cerebellar function.We investigated whether vestibular rehabilitation partially...

article

Magnetoencephalography with temporal spread imaging to visualize propagation of epileptic activity

Sumiya Shibata, Masao Matsuhashi, Takeharu Kunieda, Yukihiro Yamao, more

Clinical Neurophysiology > 2017 > 128 > 5 > 734-743

We describe temporal spread imaging (TSI) that can identify the spatiotemporal pattern of epileptic activity using Magnetoencephalography (MEG).A three-dimensional grid of voxels covering the brain is created. The array-gain minimum-variance spatial filter is applied to an interictal spike to estimate the magnitude of the source and the time (Ta) when the magnitude exceeds a predefined threshold at...

article

Neural pattern similarity between contra- and ipsilateral movements in high-frequency band of human electrocorticograms

Yusuke Fujiwara, Riki Matsumoto, Takuro Nakae, Kiyohide Usami, more

NeuroImage > 2017 > 147 > C > 302-313

The cortical motor areas are activated not only during contralateral limb movements but also during ipsilateral limb movements. Although these ipsilateral activities have been observed in several brain imaging studies, their functional role is poorly understood. Due to its high temporal resolution and low susceptibility to artifacts from body movements, the electrocorticogram (ECoG) is an advantageous...

article

Epileptic network of hypothalamic hamartoma: An EEG-fMRI study

Kiyohide Usami, Riki Matsumoto, Nobukatsu Sawamoto, Hiroatsu Murakami, more

Epilepsy Research > 2016 > 125 > C > 1-9

To investigate the brain networks involved in epileptogenesis/encephalopathy associated with hypothalamic hamartoma (HH) by EEG with functional MRI (EEG-fMRI), and evaluate its efficacy in locating the HH interface in comparison with subtraction ictal SPECT coregistered to MRI (SISCOM).Eight HH patients underwent EEG-fMRI. All had gelastic seizures (GS) and 7 developed other seizure types. Using a...

article

Cortico-muscular synchronization by proprioceptive afferents from the tongue muscles during isometric tongue protrusion

Hitoshi Maezawa, Tatsuya Mima, Shogo Yazawa, Masao Matsuhashi, more

NeuroImage > 2016 > 128 > C > 284-292

Tongue movements contribute to oral functions including swallowing, vocalizing, and breathing. Fine tongue movements are regulated through efferent and afferent connections between the cortex and tongue. It has been demonstrated that cortico-muscular coherence (CMC) is reflected at two frequency bands during isometric tongue protrusions: the beta (β) band at 15–35Hz and the low-frequency band at 2–10Hz...

article

Motion‐induced disturbance of auditory–motor synchronization and its modulation by transcranial direct current stimulation

Kentaro Ono, Yusuke Mikami, Hidenao Fukuyama, Tatsuya Mima, more

European Journal of Neuroscience > 43 > 4 > 509 - 515

The timing of personal movement with respect to external events has previously been investigated using a synchronized finger‐tapping task with a sequence of auditory or visual stimuli. While visuomotor synchronization is more accurate with moving stimuli than with stationary stimuli, it remains unclear whether the same principle holds true in the auditory domain. Although the right inferior–superior...

chapter

Improvement of Spastic Stroke Hemiparesis Using rTMS Combined with Motor Training

Satoko Koganemaru, Tatsuya Mima, Hidenao Fukuyama, Kazuhisa Domen

Systems Neuroscience and Rehabilitation > Brain–Machine Interfaces and Neurorehabilitation > 59-68

Stroke is the second most common cause of death and the leading cause of chronic disability in adults worldwide. Patients with chronic stroke often show increased flexor hypertonia in their affected upper limbs. Although an intervention strategy targeting the extensors of the affected upper limb might thus be expected to have benefits for functional recovery, conventional repetitive motor training...

article

Static magnetic field can transiently alter the human intracortical inhibitory system

Ippei Nojima, Satoko Koganemaru, Hidenao Fukuyama, Tatsuya Mima

Clinical Neurophysiology > 2015 > 126 > 12 > 2314-2319

Although recent studies have shown the suppressive effects of static magnetic fields (SMFs) on the human primary motor cortex (M1) possibly due to the deformed neural membrane channels, the effect of the clinical MRI scanner bore has not been studied in the same way.We tested whether the MRI scanner itself and compact magnet can alter the M1 function using single- and paired-pulse transcranial magnetic...

article

Action observation with kinesthetic illusion can produce human motor plasticity

Ippei Nojima, Satoko Koganemaru, Toshio Kawamata, Hidenao Fukuyama, more

European Journal of Neuroscience > 41 > 12 > 1614 - 1623

After watching sports, people often feel as if their sports skills might have been improved, even without any actual training. On some occasions, this motor skill learning through observation actually occurs. This phenomenon may be due to the fact that both action and action observation (AO) can activate shared cortical areas. However, the neural basis of performance gain through AO has not yet been...

article

Parkinson's disease patients showed delayed awareness of motor intention

Hayato Tabu, Toshihiko Aso, Masao Matsuhashi, Yoshino Ueki, more

Neuroscience Research > 2015 > 95 > Complete > 74-77

Although dopamine plays an important role for motor control and modulates the frontal function via basal ganglia-thalamo-cortical loop, it is not known whether dopamine can affect the awareness of motor intention or not. To test this hypothesis, we applied Libet's clock paradigm to Parkinson's disease (PD) patients. Thirteen PD patients and 13 age-matched, healthy controls took part in the experiment...

article

2-A-E-5. The effect of static magnetic stimulation on motor learning and motor cortical excitability

Ippei Nojima, Satoko Koganamaru, Hidenao Fukuyama, Tatsuya Mima

Clinical Neurophysiology > 2015 > 126 > 6 > e60

Recent studies reported the suppressive effects of static magnetic fields (SMFs) on human primary motor cortex (M1) possibly due to the deformed neural membrane channels. However, the neural mechanism of the excitability change at M1 and the suppressive effect on motor learning are not known yet. Here, we tested the biological effects of SMFs on human M1 and motor learning. We assessed whether SMFs...

article

1-A-D-24. Source-level analysis of brain oscillatory activity using hilbert transformation

Jun Matsubayashi, Wataru Tominaga, Masao Matsuhashi, Tatsuya Mima, more

Clinical Neurophysiology > 2015 > 126 > 6 > e56

We have developed a tool for source-level analysis of brain oscillatory activity using hilbert transformation. The objective of this study was to test the availability of this tool with a real data set. Magnetoencephalographic signals were recorded from ten healthy volunteers. Median nerve was electrically stimulated at the right wrist 100–150 times. Raw signals were high-pass (8Hz cutoff) and low-pass...

article

1-A-D-1. Generator mechanisms of cortical tremor in patients with benign adult familial myoclonus epilepsy (BAFME): A corticomuscular coherence study

Katsuya Kobayashi, Takefumi Hitomi, Masao Matsuhashi, Takeyo Sakurai, more

Clinical Neurophysiology > 2015 > 126 > 6 > e53

Benign adult familial myoclonus epilepsy (BAFME) is an autosomal dominant disease characterized by cortical tremor and infrequent generalized seizures. We aimed to clarify the generator mechanism of cortical tremor in BAFME by means of corticomuscular coherence. We employed 15 patients with BAFME diagnosed based on clinical and electrophysiological findings. EEG, EMG and accelerometer were simultaneously...

article

Task-specific brain reorganization in motor recovery induced by a hybrid-rehabilitation combining training with brain stimulation after stroke

Satoko Koganemaru, Nobukatsu Sawamoto, Toshihiko Aso, Akiko Sagara, more

Neuroscience Research > 2015 > 92 > Complete > 29-38

Recently, we have developed a new hybrid-rehabilitation combining 5Hz repetitive transcranial magnetic stimulation and extensor motor training of the paretic upper-limb for stroke patients with flexor hypertonia. We previously showed that the extensor-specific plastic change in M1 was associated with beneficial effects of our protocol (Koganemaru et al., 2010). Here, we investigated whether extensor-specific...

article

Functional relevance of the precuneus in verbal politeness

Aoi Ashizuka, Tatsuya Mima, Nobukatsu Sawamoto, Toshihiko Aso, more

Neuroscience Research > 2015 > 91 > Complete > 48-56

Non-competitive and non-threatening aspects of social hierarchy, such as politeness, are universal among human cultures, and might have evolved from ritualized submission in primates; however, these behaviors have rarely been studied. Honorific language is a type of polite linguistic communication that plays an important role in human social interactions ranging from everyday conversation to international...

article

Neural correlates of perceptual grouping effects in the processing of sound omission by musicians and nonmusicians

Kentaro Ono, Christian F. Altmann, Masao Matsuhashi, Tatsuya Mima, more

Hearing Research > 2015 > 319 > Complete > 25-31

Perceptual grouping is the process of organizing sounds into perceptually meaningful elements. Psychological studies have found that tones presented as a regular frequency or temporal pattern are grouped according to gestalt principles, such as similarity, proximity, and good continuity. Predictive coding theory suggests that this process helps create an internal model for the prediction of sounds...

article

Inhibition of the primary motor cortex can alter one's “sense of effort”: Effects of low-frequency rTMS

Yudai Takarada, Tatsuya Mima, Mitsunari Abe, Masahiro Nakatsuka, more

Neuroscience Research > 2014 > 89 > Complete > 54-60

Studies using force-matching tasks have suggested that when we feel a “sense of effort,” cortical regions may act to increase motor commands, and thus recruit additional motor units, in order to compensate for the exerted force. We hypothesized that suppressing activity in the primary motor cortex (M1), which is the source of the motor commands, would initiate the same process, and induce the same...

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INFONA - science communication portal

Search results for: Tatsuya Mima

Gait‐combined transcranial alternating current stimulation modulates cortical control of muscle activities during gait

The effect of illusionary perception on mismatch negativity (MMN): An electroencephalography study

P298 Can music enhance movement intention?

Effects of vestibular rehabilitation combined with transcranial cerebellar direct current stimulation in patients with chronic dizziness: An exploratory study

Magnetoencephalography with temporal spread imaging to visualize propagation of epileptic activity

Neural pattern similarity between contra- and ipsilateral movements in high-frequency band of human electrocorticograms

Epileptic network of hypothalamic hamartoma: An EEG-fMRI study

Cortico-muscular synchronization by proprioceptive afferents from the tongue muscles during isometric tongue protrusion

Motion‐induced disturbance of auditory–motor synchronization and its modulation by transcranial direct current stimulation

Improvement of Spastic Stroke Hemiparesis Using rTMS Combined with Motor Training

Static magnetic field can transiently alter the human intracortical inhibitory system

Action observation with kinesthetic illusion can produce human motor plasticity

Parkinson's disease patients showed delayed awareness of motor intention

2-A-E-5. The effect of static magnetic stimulation on motor learning and motor cortical excitability

1-A-D-24. Source-level analysis of brain oscillatory activity using hilbert transformation

1-A-D-1. Generator mechanisms of cortical tremor in patients with benign adult familial myoclonus epilepsy (BAFME): A corticomuscular coherence study

Task-specific brain reorganization in motor recovery induced by a hybrid-rehabilitation combining training with brain stimulation after stroke

Functional relevance of the precuneus in verbal politeness

Neural correlates of perceptual grouping effects in the processing of sound omission by musicians and nonmusicians

Inhibition of the primary motor cortex can alter one's “sense of effort”: Effects of low-frequency rTMS

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