Results 211 to 220 of about 27,454 (248)

P3 and contingent negative variation in Parkinson's disease

Electroencephalography and Clinical Neurophysiology, 1996
Patients with idiopathic Parkinson's syndrome, most of them in early stages of the disease, and matched healthy controls participated in a continuous performance task while their EEGs were recorded from 15 electrodes. During preparation of movements, a contingent negative variation (CNV) maximal at central and posterior sites was visible.
Pulvermüller, F., Lutzenberger, W., Müller, V. ; https://orcid.org/0000-0002-3716-5445, Mohr, B., Dichgans, J., Birbaumer, N.   +5 more
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Fear conditioning, preparedness, and the contingent negative variation

Psychophysiology, 1995
AbstractPsychophysiological research on preparedness has previously focused on autonomic nervous system parameters. The present study used electrocortical indices of fear conditioning. Subjects (n= 10) were tested under fear‐relevant and fear‐irrelevant conditions (1 week apart, order of conditions counterbalanced). Each condition comprised acquisition
M, Regan, R, Howard
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Abnormal contingent negative variation in writer's cramp

Clinical Neurophysiology, 1999
To investigate the physiological abnormality in writer's cramp, a focal dystonia which specifically affects writing.We recorded brain potentials that precede hand and neck movements (contingent negative variation or CNV) in 11 patients and 11 age-matched normal subjects.
T, Hamano, R, Kaji, M, Katayama, T, Kubori, A, Ikeda, H, Shibasaki, J, Kimura   +6 more
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Contingent negative variation and the distraction—arousal hypothesis

Electroencephalography and Clinical Neurophysiology, 1976
Thirty-two normal volunteers were tested in three conditions: (1) a constant-foreperiod reaction-time situation consisting of a flash--tone--key-press sequence (control condition); (2) the addition of a short-term memory task consisting of four letters presented within the flash--tone interval with the requirement that they be repeated after key-press ...
J J, Tecce, J, Savignano-Bowman, D, Meinbresse   +2 more
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Contingent negative variation enhancement in tinnitus patients

American Journal of Otolaryngology, 1991
Contingent negative variations recorded in 20 tinnitus patients with an average hearing level within 40 dB were compared with those from age-matched healthy controls. In addition, negative and positive potentials (N100 and P300), which are presumed to reflect stimulus information processing, were examined.
T, Shiraishi, K, Sugimoto, T, Kubo, T, Matsunaga, Y, Nageishi, M, Simokochi   +5 more
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Exploring the maximum duration of the contingent negative variation

International Journal of Psychophysiology, 2018
While the contingent negative variation (CNV) has been the subject of extensive research over the last fifty years, the maximum duration during which such cortical negativity can be maintained has, to the best of our knowledge, never been systematically explored. Participants were presented with the classic S1-S2 paradigm task, where a warning stimulus
Jonas Röhricht, Han-Gue Jo, Marc Wittmann, Stefan Schmidt   +3 more
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Contingent negative variation in children with orthostatic dysregulation

Pediatrics International, 2001
Abstract Background : Children with orthostatic dysregulation (OD) appear to have hypodynamia, as well as the symptoms described in the OD criteira. Hypodynamia, which is greatly influenced by motivation, volition and concentration, is unexceptionally recognized in their everyday life.
K, Torigoe, O, Numata, Y, Ogawa, U, Kaneko, T, Usuda, M, Imamura, K, Takeuchi, H, Suzuki, H, Endo   +8 more
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Response variables and magnitude of the contingent negative variation

Electroencephalography and Clinical Neurophysiology, 1970
Abstract When subjects in a fixed fore-period reaction time task are presented with a repetitive stimulus that is terminated by the manual response made to it, the contingent negative variations following the warning stimulus will be of greater magnitude than when a single stimulus, over which the subject has no control, is used. It is suggested that
J F, Peters, J R, Knott, L H, Miller, S I, Cohen, W J, Van Veen   +4 more
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REM sleep and contingent negative variation development

Electroencephalography and Clinical Neurophysiology, 1975
Three subjects demonstrated the ability to respond in a contingent negative variation (CNV) paradigm during rapid eye movement (REM) sleep. However, the CNV did not appear as it does in the waking state. This failure of the CNV to develop during REM sleep might be attributed to electrophysiological changes accompanying REM sleep.
J, Salamy, J, Lester, K, Jones
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Contingent Negative Variation under Competitive Situations

Perceptual and Motor Skills, 2009
Participants high and low in competitiveness completed a reaction-time task with a warning stimulus designed to elicit contingent negative variation, competing on reaction speed with a visible or invisible opponent to identify what affects contingent negative variation amplitude under more critical competitive situations.
Sayaka, Matsumoto, Haruo, Sakuma
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