Functional dissociation of lower and upper frequency mu rhythms in relation to voluntary limb movement

Pfurtscheller, Gert; Neuper, Christa; Krausz, Gunther

doi:10.1016/s1388-2457(00)00428-4

Cited by 254 publications

(170 citation statements)

References 22 publications

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“…The alpha blocking phenomenon has been regarded as reflecting a state of cortical activation which not only can be induced by the stimulation of visual or other sensory processing, but is also characteristic for planning, preparation of movements (Chatrian et al, 1959;Pfurtscheller and Berghold, 1989; and cognitive tasks (Doppelmayr et al, 2005;Klimesch, 1999;Klimesch et al, 1997). Furthermore, it is possible to divide the alpha rhythm into two frequency bands: lower 8-10 Hz, upper 10-12 Hz, which previous research suggests to have different functional meaning (Klimesch et al, 1992;Pfurtscheller et al, 2000). In general, the lower alpha desynchronization is obtained in response to almost any type of task.…”

Section: Discussionmentioning

confidence: 99%

Event-related power modulations of brain activity preceding visually guided saccades

et al. 2007

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To analyze the characteristics of the event-related desynchronization (ERD) and synchronization (ERS) of cortical rhythms during the preparation and execution of a lateralized eye movement, EEG was recorded in normal subjects during a visually guided task. Alpha and beta bands were investigated in three temporal intervals: a sensory period, a delay period and a saccade preparation period time locked with saccade onset. Modulations of ERD/ERS power, coupled with the task, reached the largest amplitudes over the frontal and parieto-occipital regions. Differences of oscillatory activity in the alpha bands revealed an intriguing pattern of asymmetry in parieto-occipital areas. Rightward saccades induced a larger desynchronization with respect to the leftward saccades in the left hemisphere, but not in the right. If representative, these findings are congruent to the established righthemisphere dominance of the brain areas that direct attention. Moreover differences between the two alpha types emerged in the frontal areas before and during the saccade preparation periods, indicative of differential engagement of these areas depending on the task demands. In conclusion, the present approach shows that planning eye movements is linked with covert orienting of spatial attention and may supply a useful method for studying eye movements and selective attention-related processes. IntroductionSaccades are short duration ballistic eye movements performed in order to foveate an image on the retina. They are generated in the brain stem, but there is extensive evidence from electrophysiological studies in monkeys (Bruce and Goldberg, 1985;Funahashi et al., 1989;Funahashi et al., 1990;Lynch et al., 1977;Schlag and Schlag-Rey, 1987) as well as from neuroimaging (Anderson et al., 1994;Fox et al., 1985;Law et al., 1997;Luna et al., 1998;Sweeney et al., 1996) and lesion studies in humans (Pierrot-Deseilligny et al., 2003a;Pierrot-Deseilligny et al., 1991b) that the cerebral cortex is involved in their control and preparation. Three main cortical areas are involved in the generation of saccades: the frontal eye field (FEF), located mostly at the intersection between the precentral sulcus and the superior frontal sulcus (Paus, 1996), the supplementary eye field (SEF), located on the medial surface of the superior frontal gyrus (Grosbras et al., 1999) and the parietal eye field (PEF), located in the intraparietal sulcus (Medendorp et al., 2003). These areas contribute to the triggering of saccades with, apparently, different roles depending on the type of saccade to be performed. Actually, saccades may be reflexive, externally

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Section: Discussionmentioning

confidence: 99%

Event-related power modulations of brain activity preceding visually guided saccades

et al. 2007

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“…While changes in the adult mu rhythm in response to self-movement were well documented [30], studies using magnetoencephalography [31,32] and EEG [33][34][35][36][37][38][39][40][41] further revealed that the adult mu rhythm is desynchronized during the observation of others' actions. Related effects were reported with older children [42,43], setting the stage for work with prelinguistic human infants using EEG.…”

Section: The Sensorimotor Mu Rhythmmentioning

confidence: 99%

“…The orderly mapping of specific body parts onto motor and somatosensory cortex-a somatotopic organization-has been documented in both adult humans and non-human primates [85]. In adults, this organization is also reflected in the mu rhythm response, such that executed (and imagined) hand movements are associated with greater mu desynchronization at central electrodes overlying hand regions of sensorimotor cortex (electrodes C3 and C4) than over the foot area (electrode Cz); conversely, for foot actions mu desynchronization is greater over the foot area than over hand areas [30,86,87]. In adults, somatotopic patterns of cortical activation during action observation have also been shown using other techniques beyond EEG, including fMRI [88 -91] and TMS [92].…”

Section: Somatotopic Organization Of Self and Other: The Body In The mentioning

confidence: 99%

Neural mirroring mechanisms and imitation in human infants

Marshall

Meltzoff

2014

Phil. Trans. R. Soc. B

153

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Studying human infants will increase our understanding of the nature, origins and function of neural mirroring mechanisms. Human infants are prolific imitators. Infant imitation indicates observation-execution linkages in the brain prior to language and protracted learning. Investigations of neural aspects of these linkages in human infants have focused on the sensorimotor mu rhythm in the electroencephalogram, which occurs in the alpha frequency range over central electrode sites. Recent results show that the infant mu rhythm is desynchronized during action execution as well as action observation. Current work is elucidating properties of the infant mu rhythm and how it may relate to prelinguistic action processing and social understanding. Here, we consider this neuroscience research in relation to developmental psychological theory, particularly the 'Like-Me' framework, which holds that one of the chief cognitive tasks of the human infant is to map the similarity between self and other. We elucidate the value of integrating neuroscience findings with behavioural studies of infant imitation, and the reciprocal benefit of examining mirroring mechanisms from an ontogenetic perspective.

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“…Frequency bands are also often functionally divided into subbands (Klimesch 1999;Pfurtscheller et al 2000;Pineda 2005). Klimesch distinguishes three alpha subbands that show different components.…”

Section: Electrophysiological Datamentioning

confidence: 99%

Coherence and phase locking of intracerebral activation during visuo- and audio-motor learning of continuous tracking movements

2007

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The aim of the present study was to assess changes in EEG coherence and phase locking between fronto-parietal areas, including the frontal and parietal motor areas, during early audio-and visuo-motor learning of continuous tracking movements. Subjects learned to turn a steering-wheel according to a given trajectory in order to minimise the discrepancy between a changing foreground stimulus (controllable by the subjects) and a constant background stimulus (uncontrollable) for both the auditory and the visual modality. In the auditory condition, we uncovered a learning-related increase in inter-hemispheric phase locking between inferior parietal regions, suggesting that coupling between areas involved in audiomotor integration is augmented during early learning stages. Intrahemispheric phase locking between motor and superior parietal areas increased in the left hemisphere as learning progressed, indicative of integrative processes of spatial information and movement execution. Further tests show a significant correlation of intra-hemispheric phase locking between the motor and the parietal area bilaterally and movement performance in the visual condition. These results suggest that the motor-parietal network is operative in the auditory and in the visual condition. This study confirms that a complex fronto-parietal network subserves learning of a new movement that requires sensorimotor transformation and demonstrates the importance of interregional coupling as a neural correlate for successful acquisition and implementation of externally guided behaviour.

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Functional dissociation of lower and upper frequency mu rhythms in relation to voluntary limb movement

Cited by 254 publications

References 22 publications

Event-related power modulations of brain activity preceding visually guided saccades

Event-related power modulations of brain activity preceding visually guided saccades

Neural mirroring mechanisms and imitation in human infants

Coherence and phase locking of intracerebral activation during visuo- and audio-motor learning of continuous tracking movements

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