Results 11 to 20 of about 7,685,099 (220)

Determination of the interaction impedance of helix slow-wave structures. [PDF]

, 2000
The computer simulation of helix travelling-wave tubes requires accurate information about the phase velocity, interaction impedance and attenuation of the helix slow wave structure at each frequency.
R.G. Carter, Carter, R. G.
core   +5 more sources

Wave Climate, Geotechnical and Geophysical Analysis of the Tillamook Jetties [PDF]

Wave Energy AS (WE) is an ocean energy company from Norway established to develop, test, market and commercialize the patented SSG™ wave energy converter technology.
Wave Energy AS, Bakke, Monica
core   +6 more sources

Optogenetic targeting of astrocytes restores slow brain rhythm function and slows Alzheimer’s disease pathology

Scientific Reports, 2023
Patients with Alzheimer’s disease (AD) exhibit non-rapid eye movement (NREM) sleep disturbances in addition to memory deficits. Disruption of NREM slow waves occurs early in the disease progression and is recapitulated in transgenic mouse models of beta ...
Yee Fun Lee, Alyssa N. Russ, Qiuchen Zhao, Stephen J. Perle, Megi Maci, Morgan R. Miller, Steven S. Hou, Moustafa Algamal, Zhuoyang Zhao, Hanyan Li, Noah Gelwan, Zhe Liu, Stephen N. Gomperts, Alfonso Araque, Elena Galea, Brian J. Bacskai, Ksenia V. Kastanenka   +16 more
doaj   +1 more source

Anaesthesia by intravenous propofol reduces the incidence of intra-operative gastric electrical slow-wave dysrhythmias compared to isoflurane

Scientific Reports, 2023
Gastric motility is coordinated by bioelectrical slow-wave activity, and abnormal electrical dysrhythmias have been associated with nausea and vomiting. Studies have often been conducted under general anaesthesia, while the impact of general anaesthesia ...
Zahra Aghababaie, Tim Hsu-Han Wang, Linley A. Nisbet, Ashton Matthee, Jarrah Dowrick, Gregory B. Sands, Niranchan Paskaranandavadivel, Leo K. Cheng, Gregory O’Grady, Timothy R. Angeli-Gordon   +9 more
doaj   +1 more source

Brain states govern the spatio-temporal dynamics of resting-state functional connectivity

eLife, 2020
Previously, using simultaneous resting-state functional magnetic resonance imaging (fMRI) and photometry-based neuronal calcium recordings in the anesthetized rat, we identified blood oxygenation level-dependent (BOLD) responses directly related to slow ...
Felipe Aedo-Jury, Miriam Schwalm, Lara Hamzehpour, Albrecht Stroh   +3 more
doaj   +1 more source

Electroencephalography in young onset dementia

BMC Neurology, 2023
Background Young onset dementia (YOD) is a major diagnostic and management problem. Methods We set out to explore if electroencephalography (EEG) might be useful in the diagnosis of young onset Alzheimer’s disease (YOAD) and young onset frontotemporal ...
Casey W Brown, Huei-Yang Chen, Peter K Panegyres   +2 more
doaj   +1 more source

Cortex-wide BOLD fMRI activity reflects locally-recorded slow oscillation-associated calcium waves

eLife, 2017
Spontaneous slow oscillation-associated slow wave activity represents an internally generated state which is characterized by alternations of network quiescence and stereotypical episodes of neuronal activity - slow wave events.
Miriam Schwalm, Florian Schmid, Lydia Wachsmuth, Hendrik Backhaus, Andrea Kronfeld, Felipe Aedo Jury, Pierre-Hugues Prouvot, Consuelo Fois, Franziska Albers, Timo van Alst, Cornelius Faber, Albrecht Stroh   +11 more
doaj   +1 more source

A continuum model for the dynamics of the phase transition from slow-wave sleep to REM sleep [PDF]

, 2010
Previous studies have shown that activated cortical states (awake and rapid eye-movement (REM) sleep), are associated with increased cholinergic input into the cerebral cortex.
Voss, Logan J., Steyn-Ross, Moira L., Sleigh, James W., Steyn-Ross, D. Alistair, Li, Xiaoli, Wilson, Marcus T.   +5 more
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Thalamic reticular nucleus induces fast and local modulation of arousal state

eLife, 2015
During low arousal states such as drowsiness and sleep, cortical neurons exhibit rhythmic slow wave activity associated with periods of neuronal silence.
Laura D Lewis, Jakob Voigts, Francisco J Flores, L Ian Schmitt, Matthew A Wilson, Michael M Halassa, Emery N Brown   +6 more
doaj   +1 more source

Cortical plasticity induced by transcranial magnetic stimulation during wakefulness affects electroencephalogram activity during sleep. [PDF]

PLoS ONE, 2008
BACKGROUND:Sleep electroencephalogram (EEG) brain oscillations in the low-frequency range show local signs of homeostatic regulation after learning.
Luigi De Gennaro, Fabiana Fratello, Cristina Marzano, Fabio Moroni, Giuseppe Curcio, Daniela Tempesta, Maria Concetta Pellicciari, Cornelia Pirulli, Michele Ferrara, Paolo Maria Rossini   +9 more
doaj   +1 more source