Magnetoencephalographic Response Characteristics Associated with Tongue Movement

Loose, Rainer; Hamdy, Shaheen; Enck, Paul

doi:10.1007/s00455-001-0062-z

Cited by 22 publications

(11 citation statements)

References 13 publications

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“…The hand area also was activated during tongue movement. This may occur because the tongue is more difficult to move as compared to hand or foot, leading to a broader region of activation overlap as detailed in [62,63] All subjects showed dynamic activity mostly in the beta band (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30). This is consistent with previous studies demonstrating the important role of beta band activity in motor control [3].…”

Section: Discussionsupporting

confidence: 89%

A High Performance MEG Based BCI Using Single Trial Detection of Human Movement Intention

Lin¹,

Sharma²,

Holroyd³

et al. 2013

Functional Brain Mapping and the Endeavor to Understand the Working Brain

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Section: Discussionsupporting

confidence: 89%

A High Performance MEG Based BCI Using Single Trial Detection of Human Movement Intention

Lin¹,

Sharma²,

Holroyd³

et al. 2013

Functional Brain Mapping and the Endeavor to Understand the Working Brain

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“…An additional advantage of MEG is that subjects can be studied in a sitting position thereby avoiding any potential confounds caused by an experimental design requiring an unphysiological supine position during swallowing. Problematic are the artifacts caused by oropharyngeal muscle activation during deglutition, which make it difficult to study activation in subcortical and bulbar structures [12,34]. However, cortical areas and especially sensorimotor areas can be examined in detail.…”

Section: Methodsmentioning

confidence: 99%

Cortical swallowing processing in early subacute stroke

et al. 2011

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BackgroundDysphagia is a major complication in hemispheric as well as brainstem stroke patients causing aspiration pneumonia and increased mortality. Little is known about the recovery from dysphagia after stroke. The aim of the present study was to determine the different patterns of cortical swallowing processing in patients with hemispheric and brainstem stroke with and without dysphagia in the early subacute phase.MethodsWe measured brain activity by mean of whole-head MEG in 37 patients with different stroke localisation 8.2 +/- 4.8 days after stroke to study changes in cortical activation during self-paced swallowing. An age matched group of healthy subjects served as controls. Data were analyzed by means of synthetic aperture magnetometry and group analyses were performed using a permutation test.ResultsOur results demonstrate strong bilateral reduction of cortical swallowing activation in dysphagic patients with hemispheric stroke. In hemispheric stroke without dysphagia, bilateral activation was found. In the small group of patients with brainstem stroke we observed a reduction of cortical activation and a right hemispheric lateralization.ConclusionBulbar central pattern generators coordinate the pharyngeal swallowing phase. The observed right hemispheric lateralization in brainstem stroke can therefore be interpreted as acute cortical compensation of subcortically caused dysphagia. The reduction of activation in brainstem stroke patients and dysphagic patients with cortical stroke could be explained in terms of diaschisis.

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“…Hamdy et al [8] suggested that MEG should help determine the specific role of the premotor cortex in the central regulation of swallowing. In this respect, Loose et al [15] used MEG to study the sources of activation evoked by active tongue movement and swallowing; although they could detect fields associated with tongue movement, they failed to investigate cerebral activity during the tasks because of electrical activity noises arising from muscles of the face and the tongue in particular. However, Abe et al [16] showed that MEG could be a useful tool to investigate the cortical location where the swallows were initiated.…”

mentioning

confidence: 98%

Cortical Regulation During the Early Stage of Initiation of Voluntary Swallowing in Humans

et al. 2004

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The aim of the present study was to reveal the spatiotemporal relations among cortical regions involved in the initiation of voluntary swallowing in humans using magnetoencephalography (MEG). As a control task, finger extension movement, which is purely voluntary, was also investigated using the same techniques. The swallowing-related activity was distributed widely for 2000 ms before the electromyogram onset of the right suprahyoid muscle; however, the finger-related activity occurred in the late stage of the recording. The cingulate cortex, the insula, and the inferior frontal gyrus were the main loci active prior to swallowing. These cortical loci coincide with those suggested by previous human brain mapping studies that investigated the brain mechanism which controls swallowing. Activation in the cingulate cortex was registered in the early stage of swallowing and could be related to the cognitive process regarding the food being safe to swallow. The activation in the insula lasted for a long time before the initiation of swallowing. This suggests that the long-lasting activation in the insula prior to swallowing is essential for the initiation of swallowing.

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Magnetoencephalographic Response Characteristics Associated with Tongue Movement

Cited by 22 publications

References 13 publications

A High Performance MEG Based BCI Using Single Trial Detection of Human Movement Intention

A High Performance MEG Based BCI Using Single Trial Detection of Human Movement Intention

Cortical swallowing processing in early subacute stroke

Cortical Regulation During the Early Stage of Initiation of Voluntary Swallowing in Humans

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