Time variation of the EEG spectral parameters was analyzed during a 10 min resting period in 40 healthy subjects. Spectral band powers over the theta and alpha bands were calculated for each non-overlapping 2.5 s long EEG segment. The time variation of the band powers was further analyzed by computing the power spectra. The results showed that both theta and alpha band powers oscillate at an average frequency 0.024 Hz and 0.057 Hz. This indicates, that the background EEG activity is modulated by periodical slow components. We hypothesize that this modulation reflects spontaneous periodic changes of cortical excitability with control at the brainstem level.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0304-3940(92)90051-8 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effects of Remimazolam on Intraoperative Frontal Alpha Band Power Spectrum Density and Postoperative Cognitive Function in Older Adults Undergoing Lower Extremity Fractures Surgeries: A Randomized Controlled Trial.
Clin Interv Aging
January 2025
Department of Anesthesiology, The Affiliated Hospital of Yangzhou University, Yangzhou, 225012, People's Republic of China.
Purpose: Low density of electroencephalogram alpha band power was reported to be associated with perioperative cognitive dysfunction. Few studies have conducted to explore the effects of remimazolam on intraoperative frontal alpha band power spectrum density in older adults. Here, we aimed to explore the impact of remimazolam on intraoperative frontal brain wave alpha band activity and postoperative cognitive function in older adults undergoing lower extremity fractures surgeries.
View Article and Find Full Text PDFDelays in language often co-occur among toddlers diagnosed with autism. Despite the high prevalence of language delays, the neurobiology underlying such language challenges remains unclear. Prior research has shown reduced EEG power across multiple frequency bands in 3-to-6-month-old infants with an autistic sibling, followed by accelerated increases in power with age.
View Article and Find Full Text PDFEnhancing Photovoltaically Preferred Orientation in Wide-Bandgap Perovskite for Efficient All-Perovskite Tandem Solar Cells.
Adv Mater
January 2025
School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou, 215006, China.
Wide-bandgap perovskite solar cells (WBG PSCs) have promising applications in tandem devices yet suffer from low open-circuit voltages (Vs) and less stability. To address these issues, the study introduces multifunctional nicotinamide derivatives into WBG PSCs, leveraging the regulation on photovoltaically preferential orientation and optoelectronic properties via diverse functional groups, e.g.
View Article and Find Full Text PDFUnravelling the potential of a hybrid borocarbonitride biphenylene 2D network for thermoelectric applications: a first principles study.
Nanoscale
January 2025
Department of Physics, Indian Institute of Technology Patna, Bihta, Bihar, 801106, India.
In this study, we investigate a novel hybrid borocarbonitride (bpn-BCN) 2D material inspired by recent advances in carbon biphenylene synthesis, using first-principles calculations and semi-classical Boltzmann transport theory. Our analysis confirms the structural stability of bpn-BCN through formation energy, elastic coefficients, phonon dispersion, and molecular dynamics simulations at 300 K and 800 K. The material exhibits an indirect band gap of 0.
View Article and Find Full Text PDFThe power of music: impact on EEG signals.
Psychol Res
January 2025
Department of Neurology and Clinical Neurophysiology Unit, Faculty of Medicine-Cairo University, Cairo, Egypt.
Article Synopsis
- Music can influence our attention and cognitive functions without us realizing it, and it triggers neurotransmitter release in the brain that improves our mood and thinking.
- This study examined how two types of music—Egyptian folk and classical—affected brain activity in 76 participants, revealing that different music genres activate distinct cortical areas in the brain, particularly influencing the frontal and occipital regions.
- Findings showed that folk music led to a significant decrease in brain activity, indicating a relaxed state that could temporarily reduce cognitive abilities, while classical music was linked to an overall more relaxed brain state.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!