Magnetoencephalographic (MEG) studies have revealed enhancement of neural activity the N1m response auditory evoked fields in long-term trained musicians, reflecting neuroplastic modification representation cortex. In contrast, amplitude P2 potentials is modified by musical experience, with no alteration N1. Here, we performed a comprehensive MEG study using stimulation successive musical-instrument tones to examine how activities different responses are experienced musicians who commenced...

OBJECTIVE It is known that functional magnetic resonance imaging (fMRI) and magnetoencephalography (MEG) are sensitive to the frontal temporal language function, respectively. Therefore, we established combined use of fMRI MEG make reliable identification global dominance in pathological brain conditions. METHODS We investigated 117 patients with lesions whose was successfully confirmed by Wada test. All were asked generate verbs related acoustically presented nouns (verb generation) for...

WE PRESENT A novel noninvasive technique for functional neurosurgical simulation combining three-dimensional magnetic resonance imaging of the brain surface with somatosensory evoked fields (SEFs) in a case subcortical tumor. The preoperative analysis using this revealed that central sulcus was located between SEF source projected onto and At time surgery, clearly identified by phase reversal cortical recordings potentials. actual anatomy maximum potential location showed excellent agreement...

Meg responses from musicians who had absolute pitch and non-musicians were measured while they received different auditory stimuli. The parameters of single equivalent current dipoles (ECDs) calculated for the N1m occurring in cortex. location ECD noise burst was significantly posterior to ECDs tones two hemispheres musicians, but not those non-musicians. Further, left hemisphere These results suggest distinct neural activities cortex which may be result cortical plasticity produced by...

In the study of magnetoencephalography, it is important to obtain evoked fields with good signal-to-noise ratios (S/N) and a small number epochs in averaging. The noises are considered be mainly spontaneous neuromagnetic fields. present study, we propose method improve S/N. basic principle this elimination principal component (PC) multichannel-recorded fields, utilizing synchronized characteristics rhythmic activities dominating proposed is, therefore, called (PCEM). PCEM was applied...

Right-ear advantage refers to the observation that when two different speech stimuli are simultaneously presented both ears, listeners report more correctly from right ear than left. It is assumed result prominent projection along auditory pathways contralateral hemisphere and dominance of left cortex for perception elements. Our study aimed investigate role attention in right-ear advantage. We recorded magnetoencephalography data while participants listened pairs Japanese two-syllable words...

✓Dissociated language functions are largely invalidated by standard techniques such as the amobarbital test and cortical stimulation. Language studies in which magnetoencephalography (MEG) functional magnetic resonance (fMR) imaging used to record data while patient performs lexicosemantic tasks have enabled researchers perform independent brain mapping for temporal frontal (MEG is fMR functions). In this case report, authors describe a right-handed whom right-sided insular glioma was...

The auditory steady-state response (ASSR) is a weak potential or magnetic elicited by periodic acoustic stimuli with maximum at about 40-Hz periodicity. In most previous studies using amplitude-modulated (AM) tones of stimulus sound, long lasting more than 10 s in length were used. However, characteristics the ASSR short AM have remained unclear. this study, we examined magnetoencephalographic (MEG) sequence sinusoidal 0.78 various tone frequencies 440–990 Hz one octave variation. It was...

In order to locate the coordination center of speech movements in dominant hemisphere normal human brain, we measured magnetoencephalographic (MEG) signals from left frontal area right-handed subjects while they pronounced different words. A broad response appeared during a period 120-320 ms before onset sound, and its current dipole sources were localized on magnetic resonance images region around superior end insula. Further, MEG preceded by about 100 perioral muscle activities that...

Long-latency auditory-evoked magnetic field and potential show strong attenuation of N1m/N1 responses when an identical stimulus is presented repeatedly due to adaptation auditory cortical neurons. This weak in subsequently occurring P2m/P2 responses, being weaker for piano chords than single notes. The P2m more suppressed musicians having long-term musical training nonmusicians, whereas the amplitude P2 enhanced preferentially as spectral complexity tones increases. To address key issues...

Group musical improvisation is thought to be akin conversation, and therapeutically has been shown effective at improving communicativeness, sociability, creative expression, overall psychological health. To understand these therapeutic effects, clarifying the nature of brain activity during improvisational cognition important. Some insight regarding music gained via functional magnetic resonance imaging (fMRI) electroencephalography (EEG). However, we have found no reports based on...