Relations entre rythmes rapides de l'EEG et variation contingente negative (VCN)

Faucheux, Baptiste; Mantanus, H.; Gerono, A.; Timsit‐Berthier, M.

doi:10.1016/s0370-4475(83)80021-5

Cited by 2 publications

(1 citation statement)

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“…The correlation between the CNV amplitude and the EEG spectrum over 3 periods of 1 s (before S1, between S1 and S2, and after S2) was found to be inverse for the alpha band and direct for the beta band. Also arousal seems to modulate the CNV: a higher beta activity was found to be correlated with a higher CNV amplitude and a higher post-imperative negativity [Faucheux et al, 1983;Pierson et al, 1987;Ikemi, 1988].…”

Section: Normal Subjectsmentioning

confidence: 95%

Tinnitus and Event-Related Activity of the Auditory Cortex

Hoke

Mühlnickel²,

Roß³

et al. 1998

Audiol Neurotol

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A neuromagnetic study in tinnitus patients and normal-hearing controls was performed with a modified contingent negative variation (CNV) paradigm. While the warning stimulus S1 was a tone burst at an intensity well above threshold, the imperative stimulus S2 was presented at a near threshold intensity because, in the majority of cases, the perceived loudness of tinnitus is very close to the threshold for a pure tone of the same frequency. Subjects had to respond to S2 by pressing a button until its offset was detected. In this case, instead of the usual sudden cut-off of the CNV after the perception of S2, a slow negative deflection develops, the post-imperative negative variation (PINV). Its initial portion probably indicates the development of a second initial CNV because the subject had to attend also to the offset of S2. The neuromagnetic data were analysed both in the time domain and in the frequency domain (short-time spectral analysis of the classical EEG bands). The time domain waveform as well as the spectrotemporal patterns of the MEG bands exhibited deviations from the normal pattern in several tinnitus subgroups, depending on the characteristics of tinnitus (tonal vs. noisiform, monaural vs. binaural) and on the stimulation conditions (tinnitus side vs. non-tinnitus side).

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Section: Normal Subjectsmentioning

confidence: 95%