Results 201 to 210 of about 29,201 (244)

Contingent Negative Variation in Childhood Migraine

Cephalalgia, 1993
Adult migraineurs without aura have an increased amplitude of the Contingent Negative Variation (CNV) between attacks. Given the potential diagnostic importance of this finding and the difficulties associated with diagnosing migraine in childhood it seemed important to assess CNV in children suffering from this disorder.
E, Besken, R, Pothmann, G, Sartory
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Contingent Negative Variation (CNV)

2023
The contingent negative variation (CNV), first described by Gray Walter in 1964 as “expectancy wave,” is a slow cortical endogenous potential widely recognized as the electrophysiological signature of a task-specific preparatory state that facilitates the stimulus perception and the required response.
Fattapposta, Francesco, Pauletti, Caterina, Mannarelli, Daniela, De Pascalis, Vilfredo, Ciorciari, Joseph, Crewther, David, White, David, Knyazev, Gennady   +7 more
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Improved Contingent Negative Variation Audiometry

International Journal of Audiology, 1980
In earlier reports we described contingent negative variation audiometry (CNV-A) and explored the accuracy of the method used in clinical conditions. Amplitude was found to be the factor which determines the accuracy of CNV-A. With this study we aimed to increase the amplitude of the CNV so as to improve the accuracy of CNV-A.
T S, Prevec, K, Ribarić
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Reliability and Stability of Contingent Negative Variation

Applied Psychophysiology and Biofeedback, 2000
Reliability parameters of a test indicate the stability (and quality) of the test itself. Reliability coefficients greater than 0.70 suggest an attribute as being sufficiently stable over time to be characterized as a trait. Reliability parameters of contingent negative variation (CNV) amplitudes in 27 healthy individuals were determined using a test ...
P, Kropp, A, Kiewitt, H, Göbel, P, Vetter, W D, Gerber   +4 more
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Motivational determinants of the “contingent negative variation”

Electroencephalography and Clinical Neurophysiology, 1966
Abstract 1. 1. The motivational correlates of the vertex negative slow potentials shift seen during reaction time foreperiod, called “the contingent negative variation” or “expectancy wave”, have been studied in two experiments with young adult human males. 2. 2.
D A, Irwin, J R, Knott, D W, McAdam, C S, Rebert   +3 more
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The contingent negative variation in positive and negative types of schizophrenia

American Journal of Psychiatry, 1994
The authors analyzed the contingent negative variations of 20 medicated patients with schizophrenia diagnosed according to DSM-III-R and 20 age- and sex-matched normal comparison subjects. For the patients with schizophrenia, there were significant correlations between contingent negative variation amplitude and two items on the Scale for the ...
S, Oke, R, Saatchi, E, Allen, N R, Hudson, B W, Jervis   +4 more
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Contingent negative variation in children with anorexia nervosa

Pediatrics International, 1999
Central catecholamines, particularly dopaminergic and noradrenergic systems, have affected the appetitive behavior in patients with anorexia nervosa (AN). The purpose of this study is to distinguish the characteristics of contingent negative variation (CNV) and postimperative negative variation (PINV), which may reflect the level of catecholamine in ...
K, Torigoe, O, Numata, T, Sato, C, Imai, K, Takeuchi, H, Yamazaki, H, Hotta, N, Boku, S, Yazaki, S, Sudo, A, Kuwabara, S, Hasegawa, M, Hiura, H, Ino   +13 more
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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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Serotonergic-1a activity and contingent negative variation

Biological Psychology, 2000
While cholinergic, dopaminergic, noradrenergic, and gabaergic effects on contingent negative variation (CNV) have been largely described, little is known about serotonergic influence. Therefore, the relationship between CNV and serotonergic activity as reflected by prolactin (PRL) response to flesinoxan, a 5-HT(1A) full agonist, has been investigated ...
M, Hansenne, W, Pitchot, E, Pinto, P, Papart, M, Ansseau   +4 more
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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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