A large number of studies document cardiorespiratory changes occurring while listening to music. Less is known, however, about the interaction between cardiorespiratory and cerebral electrical rhythms during listening to music and how cognition and acoustic structural aspects of songs influence that interaction. We focused on tempo as a structural feature of songs, since tempo is a major determinant of physiological responses to music, and on familiarity and randomization of phase of local spectra of known and unknown songs for cognition. Our results indicated an overall increase in the degree of synchronization among cardiorespiratory variables (Heart rate (RR), systolic and diastolic blood pressure (SBP, DBP), respiration) and between cardiorespiratory and cerebral (EEG) oscillations during all songs. We also observed a marked decrease in respiratory frequency bandwidth and increase in respiratory rate while listening to songs, and slow song produced the most periodic breathing. Compared with slow tempo, during fast song, DBP and cerebral oscillations became less synchronized with high frequency components of RR suggesting that the processes causing the previously known reduction in vagal activity with increase in tempo also may have caused the decrease in these synchronizations. Cognition of songs affected the SBP coherencies the most. DBP was synchronized with respiration more than all other measured variables in response to auditory stimuli. Results indicate an overall increase in the degree of synchronization among a variety of cerebral electrical and autonomically driven cardiovascular rhythms. It is possible that this significant increase in synchronizations underlies the widely reported pleasurable and palliative effects of listening to music.
- MeSH
- autonomní nervový systém fyziologie MeSH
- dospělí MeSH
- dýchání * MeSH
- hudba * MeSH
- kognice fyziologie MeSH
- korová synchronizace MeSH
- krevní tlak MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- sluchová percepce MeSH
- srdce fyziologie MeSH
- zdraví dobrovolníci pro lékařské studie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- MeSH
- alfa rytmus EEG MeSH
- bdění fyziologie MeSH
- blízká infračervená spektroskopie metody MeSH
- elektroencefalografická fázová synchronizace fyziologie MeSH
- elektroencefalografie * metody MeSH
- epilepsie diagnostické zobrazování MeSH
- hyperkinetická porucha diagnostické zobrazování MeSH
- korová synchronizace MeSH
- lidé MeSH
- mozkové vlny fyziologie MeSH
- nelineární dynamika MeSH
- spánek REM fyziologie MeSH
- stadia spánku fyziologie MeSH
- Check Tag
- lidé MeSH
OBJECTIVE: The aim of this work was to study the oscillatory changes during target and distractor stimuli processing. We focused mainly on responses after distractor stimuli in the prefrontal cortex and their possible relation to our previous results from the basal ganglia. METHODS: Five epilepsy surgery candidates with implanted depth electrodes performed a three-stimulus paradigm. The frequent stimulus (70%; without required response) was a small blue circle, the target stimulus (15%; with motor response) was a larger blue circle, and the distractor stimulus (15%; without required response) was a checkerboard. The SEEG signals from 404 electrode contacts were analysed using event-related de/synchronization (ERD/S) methodology. RESULTS: The main response to the target stimuli was ERD in the alpha and low beta bands, predominantly in the motor control areas, parietal cortex and hippocampus. The distractor stimuli were generally accompanied by an early theta frequency band power increase most markedly in the prefrontal cortex. CONCLUSIONS: Different ERD/S patterns underline attentional shifting to rare target ("go") and distractor ("no-go") stimuli. SIGNIFICANCE: As an increase in lower frequency band power is considered to be a correlate of active inhibition, the prefrontal structures seem to be essential for inhibition of non-required movements.
- MeSH
- alfa rytmus EEG fyziologie MeSH
- beta rytmus EEG fyziologie MeSH
- biologické hodiny fyziologie MeSH
- dospělí MeSH
- elektroencefalografie * MeSH
- epilepsie patofyziologie MeSH
- evokované potenciály fyziologie MeSH
- kognice fyziologie MeSH
- korová synchronizace fyziologie MeSH
- lidé MeSH
- mladiství MeSH
- modely neurologické * MeSH
- prefrontální mozková kůra fyziologie MeSH
- psychomotorický výkon fyziologie MeSH
- světelná stimulace metody MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
Using intracerebral EEG recordings in a large cohort of human subjects, we investigate the time course of neural cross-talk during a simple cognitive task. Our results show that human brain dynamics undergo a characteristic sequence of synchronization patterns across different frequency bands following a visual oddball stimulus. In particular, an initial global reorganization in the delta and theta bands (2-8 Hz) is followed by gamma (20-95 Hz) and then beta band (12-20 Hz) synchrony.
- MeSH
- dospělí MeSH
- elektroencefalografie MeSH
- kognice fyziologie MeSH
- korová synchronizace fyziologie MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mozek fyziologie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Recent findings indicate that changes in synchronization of neural activities underlying sensitization and kindling could be more comprehensively understood using nonlinear methods. With this aim we have examined local synchronization using novel measure of coarse-grained information rate (CIR) in 8 EEG signals recorded at different cortical areas in 44 patients with paranoid schizophrenia. The values of local synchronization that could reflect sensitization related changes in EEG activities of cortical sites were then related to psychometric measures of epileptic-like symptoms and positive and negative schizophrenia symptoms (PANSS). While no significant correlations between CIR and positive and negative symptoms have been found, statistically significant relationships described by Spearman correlation coefficients between CIR indices and results of LSCL-33 have been observed in 7 (of 8) EEG channels (r in the range from 0.307 to 0.374, p<0.05). Results of this study provide first supportive evidence for the relationship between local synchronization measured by CIR and epileptic-like symptoms in schizophrenia.
- MeSH
- dospělí MeSH
- elektroencefalografie metody MeSH
- epilepsie etiologie MeSH
- korová synchronizace MeSH
- lidé MeSH
- mladý dospělý MeSH
- paranoidní schizofrenie komplikace MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Recent findings indicate that complex cognitive functions are organized at a global level in the brain and rely on large-scale information processing requiring functional integration of multiple disparate neural assemblies. The critical question of the integration of distributed brain activities is whether the essential integrative role can be attributed to a specific structure in the brain or whether this ability is inherent to the cognitive network as a whole. The results of the present study show that mean values of the running correlation function in frontal-temporal EEG pairs with one electrode in the anterior cingulate cortex (ACC) are significantly higher than the same values in other frontal-temporal pairs. These findings indicate a particular role of the ACC in large-scale communication, which could reflect its unique integrative functions in cognitive processing.
- MeSH
- amygdala patofyziologie MeSH
- beta rytmus EEG fyziologie MeSH
- čelní lalok patofyziologie MeSH
- cingulární gyrus patofyziologie MeSH
- dominance mozková fyziologie MeSH
- elektroencefalografie MeSH
- epilepsie patofyziologie MeSH
- Fourierova analýza MeSH
- gyrus parahippocampalis patofyziologie MeSH
- hipokampus patofyziologie MeSH
- implantované elektrody MeSH
- korová synchronizace fyziologie MeSH
- lidé MeSH
- mapování mozku MeSH
- počítačové zpracování signálu MeSH
- spánkový lalok patofyziologie MeSH
- vědomí fyziologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Previous EEG studies reported the presence of synchronised 15-30 Hz oscillations in vertex electrodes following innocuous somatosensory stimulation and noxious laser stimulation. The purpose of the present study was to analyse the sources of poststimulus increases of 15-30 Hz oscillations during noxious laser stimulation of four different body regions and to compare the sources of the poststimulus synchronisation with the sources of the N2 component of laser-evoked potential (LEP). In 10 healthy subjects, moderately painful laser stimuli were applied to the dorsum of the right hand, dorsum of the right foot, right groin, and right side of the face. EEG data, recorded from 111 scalp sites, were analysed using event-related desynchronisation method and source dipole analysis. A profound amplitude increase of 15-30 Hz oscillations peaking 1-2 s after noxious laser stimulation was found during stimulation of each body part. The sources of these oscillations were located in the dorsal posterior cingulate cortex and showed no somatotopic arrangement. The sources of the N2-LEP component were located in the anterior mid-cingulate cortex 25-30 mm rostral to the sources of 15-30 Hz oscillations. The amplitude of the poststimulus synchronisation of 15-30 Hz oscillations correlated (P<0.05) with the amplitude of N2-LEP component. Results show that noxious laser stimuli induce bursts of 15-30 Hz oscillations in the posterior cingulate cortex. The poststimulus increases of 15-30 Hz oscillations may stand for transient cortical inhibition possibly aiding temporary suppression of motor programs that have been primed by noxious stimulation.
- MeSH
- bolest patofyziologie MeSH
- časové faktory MeSH
- cingulární gyrus patofyziologie MeSH
- dospělí MeSH
- elektroencefalografie MeSH
- evokované potenciály MeSH
- funkční lateralita MeSH
- korová synchronizace MeSH
- lasery škodlivé účinky MeSH
- lidé MeSH
- mapování mozku MeSH
- mozek patofyziologie MeSH
- noha (od hlezna dolů) patofyziologie MeSH
- obličej patofyziologie MeSH
- periodicita MeSH
- počítačové zpracování signálu MeSH
- ruka patofyziologie MeSH
- třísla patofyziologie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mužské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Event-related synchronizace a desynchronizace (tzv. ERD/S) představuje kvantitativní nelineární metodu analýzy EEG signálu umožňující hodnocení změn základní EEG aktivity v libovolných frekvenčních pásmech. Tyto změny jsou vázány na zevní či vnitřní podnět a jsou spojeny s určitou mozkovou aktivací. Metoda je široce využívána v neurovědním výzkumu jako forma funkčního mapování. Velký význam má pak především rozbor dat získaných pomocí hlubokých mozkových elektrod.
Event-related synchronization and desynchronization (ERD/S) represents a quantitative non-linear EEG signal analysis method, that enables to evaluate the changes of the background activity in any frequency ranges. These changes are related to an external or internal stimulus and are linked to the brain activation. It is widely used in the neuroscience research as a form of functional brain mapping. Especially the intracerebral recording data analysis have a big importance.
- MeSH
- elektroencefalografie metody MeSH
- kognice MeSH
- korová synchronizace MeSH
- lidé MeSH
- mapování mozku metody MeSH
- motorické evokované potenciály MeSH
- sluchové evokované potenciály MeSH
- somatosenzorické evokované potenciály MeSH
- zrakové evokované potenciály MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
Spatiotemporal dynamics of event-related potentials (ERP) evoked by non-target stimuli in a visual oddball experiment and the presence of coherent oscillations in beta 2 frequency band of decomposed EEG records from peristimulus period were investigated by means of intracranial electrodes in humans. Twenty-one patients with medically intractable epilepsy participated in the study. The EEG signal was recorded using platinum electrodes implanted in several cortical and subcortical sites. Averaged 2 s EEG records were analyzed. Task-specific EEG changes were found in each patient, ERPs were derived from 92 electrodes used (96 % of possible cases). In the majority of analysed cases, ERPs were composed of several distinct components, and their duration was mostly longer than 1 s. The mean onset of the first ERP component was 158+/-132 ms after the stimulus (median 112 ms, minimum value 42 ms, maximum value 755 ms), and large variability of these onset times was found in all the investigated structures. Possible coherence between neural activities of remote brain sites was investigated by calculating running correlations between pairs of decomposed EEG records (alpha, beta 1, beta 2 frequency bands were used, total number of correlated pairs was 662 in each frequency band). The record pairs exhibiting highly correlated time segments represented 23 % of all the investigated pairs in alpha band, 7 % in beta 1 band, and 59 % in beta 2 band. In investigated 2 s record windows, such segments were distributed evenly, i.e. they were also found before the stimulus onset. In conclusion, the results have implicated the idea that a lot of recorded ERPs was more or less by-products of chance in spreading a signal within the neuronal network, and that their functional relevance was somewhat linked with the phenomenon of activity synchronization.
- MeSH
- beta rytmus EEG MeSH
- časové faktory MeSH
- dospělí MeSH
- epilepsie patofyziologie psychologie MeSH
- financování organizované MeSH
- implantované elektrody MeSH
- kognice MeSH
- korová synchronizace MeSH
- lidé středního věku MeSH
- lidé MeSH
- mapování mozku metody přístrojové vybavení MeSH
- mozková kůra patofyziologie MeSH
- nervová síť patofyziologie MeSH
- periodicita MeSH
- světelná stimulace MeSH
- teorie detekce signálu MeSH
- zraková percepce MeSH
- zrakové dráhy patofyziologie MeSH
- zrakové evokované potenciály MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
