23 Motor Preparation, Recorded on the Cortical and Spinal Level

Brunia, C.H.M.

doi:10.1016/s0166-4115(08)61958-5

Cited by 7 publications

(5 citation statements)

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“…These kinds of amplitude distributions might result from the activation of ipsilateral uncrossed pyramidal tract neurons. It is however more probable that the orientation of current dipole sources at the foot motor area on the medial surface of the contralateral hemisphere is responsible for the trend towards ipsilateral dominance (Brunia 1980). Similar "paradoxical" lateralization has also been reported for some evoked response deflections elicited by the stimulation of the peripheral nerves of the foot (Tsumoto et al 1972, Cruse et al 1982) and for visual half-field pattern reversal re-sponses (Barrett et al 1976).…”

Section: Discussionmentioning

confidence: 61%

“…The trend towards ipsilateral amplitude dominance also supported the results of Brunia (1981), who reported that self paced foot movements were preceded by ipsilateral amplitude maxima. It is however more probable that the orientation of current dipole sources at the foot motor area on the medial surface of the contralateral hemisphere is responsible for the trend towards ipsilateral dominance (Brunia 1980). It is however more probable that the orientation of current dipole sources at the foot motor area on the medial surface of the contralateral hemisphere is responsible for the trend towards ipsilateral dominance (Brunia 1980).…”

Section: Discussionmentioning

confidence: 98%

“…However, the MEG (like the conventional EEG) measures the resultant activity of numerous simultaneously active sources. Thus, there remains the possibility that hemispheric dominance factors play a role in the genesis of premovement EEG shifts (Brunia 1980).…”

Section: Discussionmentioning

confidence: 99%

“…Using a CNV-paradigm, Brunia (1980) studied the preparation for a plantar flexion of the right or left foot in right-handed subjects. Surprisingly, the late CNV-wavewhich probably reflects events similar to the premovement potentials preceding self-paced movements-had amplitude maxima on the right hemisphere before the movements of both the left and the right foot.…”

mentioning

confidence: 99%

“…The potential distributions preceding the movements of the right foot were explained on the basis of the orientation of the current dipoles underlying these slow potentials: the activation of the motor areas of the foot at the medial side of the hemisphere might well result in amplitude maxima on the scalp of the opposite hemisphere. It was also suggested that hemispheric dominance factors had a role in the generation of the potential distributions (Brunia 1980).…”

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confidence: 99%

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Slow EEG potentials preceding self‐paced plantar flexions of hand and foot

Hari

Antervo

Salmi

1983

Acta Physiologica Scandinavica

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Slow EEG shifts preceding voluntary self-paced plantar flexions of hand and foot were studied in five healthy right handed subjects. The EEG was recorded from a coronal electrode chain at the central areas. The movements were preceded by slow negative shifts beginning even as early as one second before the movement and culminating in fast slopes during the early EMG activity at the onset of the movements. The EEG shifts preceding hand and foot movements were differently distributed over the scalp: hand movements were preceded by contralaterally maximal shifts a few hundred milliseconds before the movement, whereas the potential distribution preceding foot movements were symmetrical or ipsilaterally dominant. It is suggested that the differences in the scalp distributions are due to the different orientation of the current dipoles at the cortical motor areas of hand and foot.

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Section: Discussionmentioning

confidence: 61%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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