Results 251 to 260 of about 81,695 (282)
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Gamma Oscillations in the Hippocampus
Physiology, 2010Gamma oscillations are thought to temporally link the activity of distributed cells. We discuss mechanisms of gamma oscillations in the hippocampus and review evidence supporting a functional role for such oscillations in several key hippocampal operations, including cell grouping, dynamic routing, and memory.
Laura Lee, Colgin, Edvard I, Moser
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Hippocampal gamma oscillations in rats
IEEE Engineering in Medicine and Biology Magazine, 2009Previous studies suggested that gamma oscillations in the brain are associated with higher order cognitive functions, including selective visual attention, motor task planning, sensory perception, working memory, and dreaming rapid eye movement (REM) sleep. These oscillations are mainly observed in the cortical regions and also occur in neocortical and
Yasemin M, Akay +4 more
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Proprioceptive evoked gamma oscillations
Brain Research, 2007A proprioceptive stimulus consisting of a weight change of a handheld load has recently been shown to elicit an evoked potential. Previously, somatosensory gamma oscillations have only been evoked by electrical stimuli. We conjectured that a natural proprioceptive stimulus also would be able to evoke gamma oscillations.
Arnfred, Sidse M +3 more
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Gamma oscillations in a minimal CA3 model
Neurocomputing, 2006A minimal model of the CA3 region of the hippocampus produces gamma oscillations. These oscillations exist across a broad range of conditions. For instance, the oscillations exist in the presence or absence of external input. Additionally, quantal synaptic failures do not eliminate the gamma oscillations. More importantly, there is a sensitivity to the
Ashlie B. Hocking, William B. Levy
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Cortical gamma oscillations in isolated dystonia
Parkinsonism & Related Disorders, 2018We describe a novel electrophysiologic signal from the motor cortex of patients with generalized dystonia - a discrete gamma-band oscillation induced by movement and associated with emergence of dystonia. This was observed using both invasive and non-invasive methods.
Svjetlana, Miocinovic +5 more
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2010
AbstractGamma oscillations can be elicited in hippocampal and neocortical slices, by carbachol and by kainate. Pyramidal neurons fire at low rates, but fast-spiking interneurons fire at near gamma rates. The oscillations require gap junctions, presumably on axons, as the oscillations are still present in a connexin36 knockout (although at reduced power)
Roger D. Roger, Miles A. Whittington
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AbstractGamma oscillations can be elicited in hippocampal and neocortical slices, by carbachol and by kainate. Pyramidal neurons fire at low rates, but fast-spiking interneurons fire at near gamma rates. The oscillations require gap junctions, presumably on axons, as the oscillations are still present in a connexin36 knockout (although at reduced power)
Roger D. Roger, Miles A. Whittington
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Gamma Oscillations in the Somatosensory Cortex of Newborn Rats
Bulletin of Experimental Biology and Medicine, 2014Here we addressed a question of whether gamma oscillations previously described in the whisker-related barrel cortex are a universal pattern of activity in the somatosensory cortex of newborn rats. Intracortical recording of local field potentials and action potentials in neurons using multisite silicon electrodes in 2-7-day-old rats showed that ...
Gerasimova E. +6 more
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Stimulus-induced gamma oscillations
NeuroReport, 1995Event-related changes of spectral power of the EEG were studied for each integer frequency between 5 and 100 Hz in three subjects during memory storage and retrieval. Spectra were calculated for successive, overlapping time epochs in seven channels. In one subject a stimulus-locked increase of power was observed at 12 Hz, while in the other two alpha ...
E, Jürgens +3 more
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BOLD-Response and EEG Gamma Oscillations
2009The rhythmic activities in the resting or “spontaneous” EEG are usually divided into several frequency bands (delta:
Gregor Leicht +2 more
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Human EEG gamma oscillations in neuropsychiatric disorders
Clinical Neurophysiology, 2005Due to their small amplitude, the importance of high-frequency EEG oscillations with respect to cognitive functions and disorders is often underestimated as compared to slower oscillations. This article reviews the literature on the alterations of gamma oscillations (about 30-80 Hz) during the course of neuropsychiatric disorders and relates them to a ...
C S, Herrmann, T, Demiralp
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