Low-frequency (&lt;1Hz) oscillations in the human sleep electroencephalogram

Achermann, Peter; Borbély, A A

doi:10.1016/s0306-4522(97)00186-3

Cited by 537 publications

(358 citation statements)

References 34 publications

Supporting

Mentioning

320

Contrasting

Order By: Relevance

“…They referred to the newly discovered rhythm as 'slow' oscillation because of its frequency between 0.5 and 1.5 Hz. Slow oscillation was soon shown also in the human EEG during sleep (Achermann and Borbely, 1997;Amzica and Steriade, 1997;Molle et al, 2002), indicating its crucial importance for neocortical function. An important aspect of slow oscillation is its ability to temporally organize other cortical patterns, such as sleep spindles, gamma oscillations and K complexes (Achermann and Borbely, 1997;Amzica and Steriade, 1997;Molle et al, 2002;Steriade and Amzica, 1998a;Mukovski et al, 2006) and hippocampal sharp wave ripples (Sirota et al, 2003).…”

Section: Slow (<1 Hz) Rhythms-mirceamentioning

confidence: 99%

“…1). As discussed earlier, deep, slow-wave sleep is characterized by widespread, synchronized, oscillatory patterns that are defined primarily by spatially coherent delta waves (Achermann and Borbely, 1997) during which spiking activity of nearly all principal cells and interneurons in the neocortex is suspended (Steriade and Buzsáki, 1990;Battaglia et al, 2004). Under anesthesia, similar but longer silent periods alternate regularly with active, spiking epochs (Steriade et al, 1993e;Steriade et al, 1993f;Steriade et al, 1993b;Amzica and Steriade, 1995;Destexhe et al, 1999).…”

Section: Slow Oscillations Unify Neocortical and Paleocortical Networkmentioning

confidence: 99%

“…Under anesthesia, similar but longer silent periods alternate regularly with active, spiking epochs (Steriade et al, 1993e;Steriade et al, 1993f;Steriade et al, 1993b;Amzica and Steriade, 1995;Destexhe et al, 1999). Steriade and collaborators have emphasized that the silent and active periods of slow oscillation involve brain areas several millimeters from each other (Steriade et al, 1993f;Amzica and Steriade, 1995;Achermann and Borbely, 1997;Battaglia et al, 2004) but the spatial extent of slow oscillations has not been determined. In fact, the front of neocortical DOWN-UP transition can form a traveling wave and less synchronous DOWN states can be relatively local (Fig.…”

Section: Slow Oscillations Unify Neocortical and Paleocortical Networkmentioning

confidence: 99%

See 2 more Smart Citations

Interaction between neocortical and hippocampal networks via slow oscillations

Sirota

Buzsáki

2005

THL

230

219

View full text Add to dashboard Cite

Both the thalamocortical and limbic systems generate a variety of brain state-dependent rhythms but the relationship between the oscillatory families is not well understood. Transfer of information across structures can be controlled by the offset oscillations. We suggest that slow oscillation of the neocortex, which was discovered by Mircea Steriade, temporally coordinates the self-organized oscillations in the neocortex, entorhinal cortex, subiculum and hippocampus. Transient coupling between rhythms can guide bidirectional information transfer among these structures and might serve to consolidate memory traces.

show abstract

Section: Slow (<1 Hz) Rhythms-mirceamentioning

confidence: 99%

Section: Slow Oscillations Unify Neocortical and Paleocortical Networkmentioning

confidence: 99%

Section: Slow Oscillations Unify Neocortical and Paleocortical Networkmentioning

confidence: 99%

See 1 more Smart Citation

Interaction between neocortical and hippocampal networks via slow oscillations

Sirota

Buzsáki

2005

THL

230

219

View full text Add to dashboard Cite

show abstract

“…In addition to these relatively fast EEG oscillations, some studies have demonstrated infraslow fluctuations in, for instance, neuronal population activity (2-5), EEG power (5-9), discrete sleep events (arousals, spindles, K complexes) (9)(10)(11)(12), as well as in the occurrence of epileptic events (4,11,13). These observations have raised the possibility that the human cortex may generate infraslow oscillations (ISOs) underlying such fluctuations.…”

mentioning

confidence: 99%

Infraslow oscillations modulate excitability and interictal epileptic activity in the human cortex during sleep

Vanhatalo

Palva

Holmes

et al. 2004

Proc. Natl. Acad. Sci. U.S.A.

444

397

View full text Add to dashboard Cite

Human cortical activity has been intensively examined at frequencies ranging from 0.5 Hz to several hundred Hz. Recent studies have, however, reported also infraslow fluctuations in neuronal population activity, magnitude of electroencephalographic oscillations, discrete sleep events, as well as in the occurrence of interictal events. Here we use direct current electroencephalography to demonstrate large-scale infraslow oscillations in the human cortex at frequencies ranging from 0.02 to 0.2 Hz. These oscillations, which are not detectable in conventional electroencephalography because of its limited recording bandwidth (typical lower limit 0.5 Hz), were observed in widespread cortical regions. Notably, the infraslow oscillations were strongly synchronized with faster activities, as well as with the interictal epileptic events and K complexes. Our findings suggest that the infraslow oscillations represent a slow, cyclic modulation of cortical gross excitability, providing also a putative mechanism for the as yet enigmatic aggravation of epileptic activity during sleep.epilepsy ͉ slow cortical oscillations ͉ phase synchrony ͉ direct current electroencephalography ͉ full-band electroencephalography A large body of literature has characterized functional and clinical correlates of cortical oscillatory activity seen in the human electroencephalography (EEG) at frequencies ranging from 0.5 Hz to several hundred Hz (1). In addition to these relatively fast EEG oscillations, some studies have demonstrated infraslow fluctuations in, for instance, neuronal population activity (2-5), EEG power (5-9), discrete sleep events (arousals, spindles, K complexes) (9-12), as well as in the occurrence of epileptic events (4, 11, 13). These observations have raised the possibility that the human cortex may generate infraslow oscillations (ISOs) underlying such fluctuations. ISOs are not detectable in conventional EEG because of its limited recording bandwidth (typical lower limit, 0.5 Hz; ref. 1).In the present study, we used direct current (DC)-coupled EEG scalp recordings (14-16) to demonstrate that ISOs are, in fact, a salient, large-scale feature of the human EEG. They were tightly associated with a cyclic modulation of fast EEG activity as well as discrete EEG events such as K complexes and interictal activity. In analogy with recent studies demonstrating that slow delta oscillations (0.5-1 Hz) may modulate brain excitability (17, 18), our data points to a role of ISOs in the control of gross cortical excitability. Our findings also provide a window on the modulation of interictal epileptiform events (IIEs) and on sleep-epilepsy interactions in the human brain. MethodsSubjects and EEG Recording. We studied 16 subjects (four females; average age, 34.3 years; range, 16-51 years) during overnight (n ϭ 9) or daytime (n ϭ 7) sleep. This study was approved by the Human Subjects Committee of the University of Washington. Twelve subjects were recorded using a custom-made 16-channel DC-coupled EEG amplifier and Ag͞AgCl electrodes (refs....

show abstract

“…This is achieved by means of a slow oscillation (<1 Hz) that has been described in intracellular recordings of cortical neurons (7), but equally in the EEG (8,9) and EMG (10) of humans. This cellular oscillation is marked by a continuous alternation of the membrane potential between two voltage levels: a depolarized one and a hyperpolarized one.…”

Section: Flavio Aloementioning

confidence: 99%

The brain decade in debate: VII. Neurobiology of sleep and dreams

Alóe

Amzica

Hening

et al. 2001

Braz J Med Biol Res

View full text Add to dashboard Cite

This article is a transcription of an electronic symposium held on February 5, 2001 by the Brazilian Society of Neuroscience and Behavior (SBNeC) during which eight specialists involved in clinical and experimental research on sleep and dreaming exposed their personal experience and theoretical points of view concerning these highly polemic subjects. Unlike most other bodily functions, sleep and dreaming cannot, so far, be defined in terms of definitive functions that play an ascribable role in maintaining the organism as a whole. Such difficulties appear quite clearly all along the discussions. In this symposium, concepts on sleep function range from a protective behavior to an essential function for maturation of the nervous system. Kleitman's hypothesis [Journal of Nervous and Mental Disease (1974), 159: 293-294] was discussed, according to which the basal state is not the wakeful state but sleep, from which we awake to eat, to protect ourselves, to procreate, etc. Dreams, on the other hand, were widely discussed, being considered either as an important step in consolidation of learning or simply the conscious identification of functional patterns derived from the configuration of released or revoked memorized information.

show abstract

Low-frequency (<1Hz) oscillations in the human sleep electroencephalogram

Cited by 537 publications

References 34 publications

Interaction between neocortical and hippocampal networks via slow oscillations

Interaction between neocortical and hippocampal networks via slow oscillations

Infraslow oscillations modulate excitability and interictal epileptic activity in the human cortex during sleep

The brain decade in debate: VII. Neurobiology of sleep and dreams

Contact Info

Product

Resources

About