Alpha rhythm parameters and short-term memory span

Maltseva, Irina; Masloboev, Y.P

doi:10.1016/s0167-8760(97)00776-9

Cited by 14 publications

(8 citation statements)

References 10 publications

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“…In fact, as reported above, delays caused by neuron refractivity and interneuronal transmission in the cortex are of the same order, and the duration of the time quantum TQo compares well with occasionally determined peripheral (see, e.g., Fabiani, Schmer, Tait, Gafni, & Kinarti, 1979) and central (Maltseva & Masloboev, 1997) epochs of global electrical potentials. Fast oscillations with period durations compatible with the assumed quantum have recently been demonstrated to exist in the hippocampus (Buzsaki, Horvath, Urioste, & Wise, 1992), an area known to be involved in the coordination of various cognitive activities within the cortex.…”

Section: The Time Quantum Model and The Temporal Architecture Of Neursupporting

confidence: 79%

Ultra-precise quantal timing: Evidence from simultaneity thresholds in long-range apparent movement

Geissler

Schebera

Kompass

1999

Perception & Psychophysics

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Conditions for the disappearance of long-range apparent movement were investigated. In an experiment on beta motion, critical interstimulus intervals (ISIs) of downward simultaneity thresholds for stimuli presented in continuous alternation were determined for exposure durations (EDs) varying from 3 to 160 msec. Each subject performed each test twice. Data were collected in three sessions, each for one of three angular separations (30, 6 0, and 12 0) and the full set of EDs. The distribution of critical ISIs collapsed across subjects, EDs, and angular separations shows sharp maxima at regular distances within a range of 0-110 msec lSI. Significant or near-significant peaks were found at ISIs of5, 9, 22, 27, 43, 55, and 107 msec. Although mean critical ISIs shifted with spatial separation, no essential shift of the main maxima occurred. Evidence of a periodic modulation with a period duration of 4.5 msec was obtained from the distributions of differences between critical ISIs of the first tests and their replications, which exhibit extremely low standard deviations (<10 msec). These results agree well with previous analyses (Geissler, 1987(Geissler, , 1992) that led to a taxonomic model of quanta! timing, briefly summarized in this paper. Further consequences are discussed and related to earlier developments (Geissler, 1991(Geissler, , 1992(Geissler, , 1997.In this paper, we consider simultaneity thresholds of apparent movement as a tool for exploring phenomena of temporal quantization in perception on the millisecond level of real time. Before introducing the experimental setup, we present a brief outline of the theoretical rationale from which our expectations about fine-grained temporal structures in perception derive. MotivationWhether or not mental processes exhibit a discrete quantal temporal fine-structure is an old question in psychology. But to date, none of the proposed answers has proved to be satisfactory. Early theorizing on the issue was based on the notion of a psychological moment as a universal building block of mental time (Stroud, 1956;Baer, 1864). Evidence from the last four decades, however, indicates that approaches adopting universal principles for mental timing cannot safely assume one unique basic unit of time, if a theory of this type can be maintained at all (Block, 1990;McReynolds, 1953; for an over-

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Section: The Time Quantum Model and The Temporal Architecture Of Neursupporting

confidence: 79%

Ultra-precise quantal timing: Evidence from simultaneity thresholds in long-range apparent movement

Geissler

Schebera

Kompass

1999

Perception & Psychophysics

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“…Children age 6–11 years have also been shown to differ from adults in the location and amplitude of alpha responses in an auditory oddball paradigm, and strikingly, the responses of the eldest children (age 10–11) were found to most similar to those of adults (Yordanova and Kolev 1996, 1997). The view that alpha mechanisms play a critical role in cognitive performance is supported by findings that individual visual STM spans are correlated with individual differences in the parameters of alpha oscillations (Maltseva and Maslobev 1997) and that resting alpha power is related to performance on both perceptual and memory tasks (Hanslmayr et al 2005). It also appears likely that alpha oscillatory mechanisms are relevant to healthy cognitive development.…”

Section: Discussionmentioning

confidence: 99%

Long-range synchronization and local desynchronization of alpha oscillations during visual short-term memory retention in children

et al. 2009

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Local alpha-band synchronization has been associated with both cortical idling and active inhibition. Recent evidence, however, suggests that long-range alpha synchronization increases functional coupling between cortical regions. We demonstrate increased long-range alpha and beta band phase synchronization during short-term memory retention in children 6-10 years of age. Furthermore, whereas alpha-band synchronization between posterior cortex and other regions is increased during retention, local alpha-band synchronization over posterior cortex is reduced. This constitutes a functional dissociation for alpha synchronization across local and long-range cortical scales. We interpret long-range synchronization as reflecting functional integration within a network of frontal and visual cortical regions. Local desynchronization of alpha rhythms over posterior cortex, conversely, likely arises because of increased engagement of visual cortex during retention.

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“…The significance of alpha synchronization to the development perceptual and cognitive function is evidenced by observation of age-related changes in event-related long-range alpha-band synchronization throughout childhood and adolescence during visual perception (Uhlhaas et al, 2009b), as well as age-related changes in alpha oscillatory responses during cognition throughout childhood (Krause et al, 2001; Yordanova and Kolev, 1996, 1997). The functional role of alpha oscillations in visual STM retention is demonstrated by findings that individual differences in visual STM span can be predicted from the parameters of alpha oscillations (Maltseva and Maslobev, 1997) and long-range alpha-band synchronization (Palva et al, 2010a). …”

Section: Discussionmentioning

confidence: 99%

Altered long-range alpha-band synchronization during visual short-term memory retention in children born very preterm

et al. 2011

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Children born very preterm, even when intelligence is broadly normal, often experience selective difficulties in executive function and visual-spatial processing. Development of structural cortical connectivity is known to be altered in this group, and functional magnetic resonance imaging (fMRI) evidence indicates that very preterm children recruit different patterns of functional connectivity between cortical regions during cognition. Synchronization of neural oscillations across brain areas has been proposed as a mechanism for dynamically assigning functional coupling to support perceptual and cognitive processing, but little is known about what role oscillatory synchronization may play in the altered neurocognitive development of very preterm children. To investigate this, we recorded magnetoencephalographic (MEG) activity while 7-8 year old children born very preterm and age matched full-term controls performed a visual shortterm memory task. Very preterm children exhibited reduced long-range synchronization in the alpha-band during visual short-term memory retention, indicating that cortical alpha rhythms may play a critical role in altered patterns functional connectivity expressed by this population during cognitive and perceptual processing. Long-range alpha-band synchronization was also correlated with task performance and visual-perceptual ability within the very preterm group, indicating that altered alpha-oscillatory mechanisms mediating transient functional integration between cortical regions may be relevant to selective problems in neurocognitive development in this vulnerable population at school age.

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Alpha rhythm parameters and short-term memory span

Cited by 14 publications

References 10 publications

Ultra-precise quantal timing: Evidence from simultaneity thresholds in long-range apparent movement

Ultra-precise quantal timing: Evidence from simultaneity thresholds in long-range apparent movement

Long-range synchronization and local desynchronization of alpha oscillations during visual short-term memory retention in children

Altered long-range alpha-band synchronization during visual short-term memory retention in children born very preterm

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