Spatiotemporal Analysis of Neuromagnetic Events Underlying the Emergence of Coordinative Instabilities

Fuchs, Armin; Mayville, Justine M.; Cheyne, Douglas; Weinberg, H.; Deecke, Lüder; Kelso, J. A. Scott

doi:10.1006/nimg.2000.0589

Cited by 48 publications

(16 citation statements)

References 16 publications

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“…To obtain further insight into the relative contributions of auditory and motor-related processes to the event-related fields, we employed a dual-basis projection technique [Friedrich and Uhl, 1996;Fuchs et al, 2000b] in which the principal field patterns from the two control conditions were projected onto each Topographic maps sampled approximately every 19 msec from the event-related fields associated with a low (top half) and high (bottom half) frequency plateau from both coordination conditions. Data are from subject 1 but are typical for all three subjects.…”

Section: Coordination Conditions: Event-related Fieldsmentioning

confidence: 99%

“…Amplitude changes were examined by plotting total spectral power. To assess the contribution of auditory and motor-related patterns brain activity associated with syncopation or synchronization, patterns obtained from the control conditions performed by each subject were projected onto eventrelated fields from the coordination conditions using a dual-basis projection technique [Friedrich and Uhl, 1996;Fuchs et al, 2000b].…”

Section: Meg Analysis: Coordination Conditionsmentioning

confidence: 99%

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Event‐related changes in neuromagnetic activity associated with syncopation and synchronization timing tasks

Mayville

Fuchs

Ding

et al. 2001

Human Brain Mapping

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For low rhythmic rates (1.0 to approximately 2.0 Hz), subjects are able to successfully coordinate finger flexion with an external metronome in either a syncopated (between the beats) or synchronized (on each beat) fashion. Beyond this rate, however, syncopation becomes unstable and subjects spontaneously switch to synchronization to maintain a 1:1 stimulus/response relationship. We used a whole-head magnetometer to investigate the spatiotemporal dynamics of neuromagnetic activity (MEG) associated with both coordinative patterns at eight different rates spanning the range 1.0-2.75 Hz. Timing changes in the event-related fields accompanied transitions from syncopation to synchronization and followed the placement of the motor response within each stimulus/response cycle. Decomposition of event-related fields into component auditory and motor brain responses revealed that the amplitude of the former decreased with increasing coordination rate whereas the motor contribution remained approximately constant across all rates. Such an interaction may contribute to changes in auditory-motor integration that cause syncopation to become unstable. Examination of event-related changes in high frequency bands revealed that MEG signal power in the beta band (15-30 Hz) was significantly lower during syncopated coordination in sensors covering the contralateral sensorimotor area suggesting a dependence of beta rhythm amplitude on task difficulty. Suppression of beta rhythms was also stronger during synchronization preceded by syncopation, e.g., after subjects had switched, when compared with a control condition in which subjects synchronized throughout the entire range of rates.

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Section: Coordination Conditions: Event-related Fieldsmentioning

confidence: 99%

Section: Meg Analysis: Coordination Conditionsmentioning

confidence: 99%

Event‐related changes in neuromagnetic activity associated with syncopation and synchronization timing tasks

Mayville

Fuchs

Ding

et al. 2001

Human Brain Mapping

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“…Kelso and co-workers studied EEG and MEG correlates of sensorimotor synchronization during transitions between different coordination modes (syncopation to synchronization) (Fuchs et al, 2000;Mayville et al, 2001). Such transitions were induced by increasing the metronome rate and typically occurred around 2 Hz.…”

Section: Relation To Previous Workmentioning

confidence: 99%

“…Formal/statistical modeling of such rhythmic motor behavior has helped to establish the notion of a central timekeeper Kristofferson, 1973a, 1973b). In conjunction with neuroimaging (Harrington et al, 1998;Jäncke et al, 2000;Rao et al, 1997;Stephan et al, 2002) and neurosensing techniques (Fuchs et al, 2000;Mayville et al, 2001;Müller et al, 2000;Tecchio et al, 2000) tapping has recently been used to explore the neural basis of timing and the temporal control of action.…”

Section: Introductionmentioning

confidence: 99%

Neurophysiological correlates of error correction in sensorimotor-synchronization

et al. 2003

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In a sensorimotor synchronization task requiring subjects to tap in synchrony with an auditory stimulus, occasional perturbations (i.e., interval changes) in an otherwise isochronous sequence of auditory metronome stimuli are known to be compensated remarkably swift and with surprising precision, even when they are too small to be consciously perceived. To investigate the neural substrate and the informational basis of error correction in sensorimotor synchronization, we recorded movement-related, auditory-evoked, and error-related EEG potentials. Experiment 1 confirmed rapid adjustment to stimulus phase shifts, with faster correction of large (50 ms) compared to small (15 ms) shifts. In addition to being corrected faster, there was overcorrection of the 50 ms shifts, attributed to engagement of period correction mechanisms. For ϩ50 ms shifts, a neural correlate of period correction was identified in the form of medial frontal cortex activation, preceded by an error-related brain potential (ERN). Auditory-evoked potential (AEP) amplitudes were sensitive to stimulus phase shifts of both large and small magnitude. Further experiments with a smaller magnitude 10 ms phase shift (Experiment 2) and passive auditory stimulation (Experiment 3) provided evidence that the modulation of AEP amplitudes is not due to metronome interval changes, but may represent auditory-somatosensory activation. Together, behavioral and neurophysiological data support the hypothesis that phase correction is a largely automatic process, not dependent on conscious perception of changes in timing. By contrast, perceivable phase shifts may invoke timekeeper adjustments accompanied by medial frontal cortex activity.

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“…7 and articles in Kruse & Stadler, 1995). The picture shown in Figure 4 (middle column) is based on considerable experimental evidence demonstrating that switching in both brain and behavior is a self-organized process that takes the form of a nonequilibrium phase transition (e.g., Daffertshofer, Peper, & Beek, 2000;Freeman & Holmes, 2005;Fuchs, Kelso, & Haken, 1992;Fuchs, Mayville, et al, 2000;Kelso, 1984;Kelso et al, 1990;Kelso, Scholz, & Schöner, 1986;Kelso et al, 1992;Mayville, Bressler, Fuchs, & Kelso, 1999;Wallenstein, Kelso, & Bressler, 1995). Fluctuations play a key role, testing the stability of states and enabling the system to discover new states.…”

Section: Metastable Mindmentioning

confidence: 99%

An Essay on Understanding the Mind

Kelso

2008

Ecological Psychology

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Several conjectures by A. S. Iberall on life and mind are used as a backdrop to sketch a theory of mental activity that respects both the contents of thought and the dynamics of thinking. The dynamics, in this case, refers fundamentally to animated, meaningfully coupled self-organizing processes (coordination dynamics) and exhibit multistability, switching, and, because of symmetry breaking, metastability. The interplay of 2 simultaneously acting forces underlies the metastable mind: the tendency for the coordinating elements to couple together (integration) and the tendency for the elements to express their individual autonomy (segregation). Metrics for metastability are introduced that enable these cooperative and competitive tendencies to be quantified. Whereas bistability is the basis for polarized, either/or thinking, the metastable régime-which contains neither stable nor unstable states, no states at all, in fact-gives rise to a far more fluid, complementary mode of operation in which it is possible for apparent contraries to coexist in the mind at the same time.

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Spatiotemporal Analysis of Neuromagnetic Events Underlying the Emergence of Coordinative Instabilities

Cited by 48 publications

References 16 publications

Event‐related changes in neuromagnetic activity associated with syncopation and synchronization timing tasks

Event‐related changes in neuromagnetic activity associated with syncopation and synchronization timing tasks

Neurophysiological correlates of error correction in sensorimotor-synchronization

An Essay on Understanding the Mind

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