Pattern-Reversal Visual Evoked Potentials in Normal 7- to 15-Year-Old Twins: A Correlation Analysis

Ristanović, Dušan; Jovanović,; Martinović, Žarko

doi:10.1159/000118550

Cited by 5 publications

(3 citation statements)

References 8 publications

(15 reference statements)

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“…3,4 Ristanovic et al reported no significant difference between P-RVEPs of children with common and complicated migraine. 19 Although there were no mean significant P-RVEP abnormalities found in our study, 7 of the 23 patients with MWOA (30%) had latencies exceeding the upper limit of normal. Interestingly, the mean duration of the disease was significantly longer in this subgroup than the other 16 patients with MWOA.…”

Section: Commentscontrasting

confidence: 65%

Pattern‐Reversal Visual Evoked Potentials in Migraineurs With or Without Visual Aura

Ho¹,

Haktanir²,

Demirci³

1997

Headache

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To determine the possible electrophysiologic changes in migraineurs with or without visual aura, we investigated pattern-reversal visual evoked potentials in 39 patients. We compared the mean P100 latency and amplitude of 16 patients with aura, 23 patients without aura, and 17 age- and sex-matched normal subjects. There were no significant differences between groups. There was no correlation between age and the parameters in any group. However, in 7 of 23 patients without aura, the P100 latency was longer than the mean control value +2 SD. The mean disease duration in this subgroup was significantly longer than the means of the remaining 16 patients without aura or the patients with aura (P < 0.05 for each). This suggests the possibility that P100 latency prolongation is a consequence, but not an entity caused by the pathogenetic mechanism of the disease from the beginning.

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Section: Commentscontrasting

confidence: 65%

Pattern‐Reversal Visual Evoked Potentials in Migraineurs With or Without Visual Aura

Ho¹,

Haktanir²,

Demirci³

1997

Headache

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“…[6][7][8][9][10] An increased amplitude of both flash and pattern-reversal VEPs (PR-VEPs) was found in juvenile migraine, confirming previous findings in adult migraineurs. [11][12][13][14][15][16][17] These studies have suggested the hypothesis that higher VEP amplitude can be an expression of neuronal hyperexcitability of the visual pathway or of the cortex related to a lowered threshold for migraine attacks. 18 The abnormal information processing has been interpreted as an interictal cortical dysfunction originating in the brain stem, in particular by the serotoninergic pathway, leading to a low preactivation level of the sensory cortices.…”

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confidence: 99%

Spectral Analysis of Visual Potentials Evoked by Pattern‐Reversal Checkerboard in Juvenile Patients With Headache

Marrelli¹,

Tozzi²,

Porto³

et al. 2001

Headache

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Changes in visual evoked potentials, mainly affecting the amplitude of the major positive wave, are referred to by many authors and are related to the pathophysiological basis of primary headache. We performed both transient pattern-reversal visual evoked potentials and spectral analysis by means of fast Fourier transform of 8-Hz steady-state pattern-reversal visual evoked potentials in 34 children affected with migraine (14 with aura, 20 without aura), and compared them with 14 patients with tension-type headache and 10 healthy subjects. The amplitude of the response to the transient stimulation (P100) was higher and the latency shorter in the patients with headache compared with the controls, but the difference was not statistically significant. The absolute power of the first harmonic (1F) obtained by the spectral analysis of the steady-state stimulation was increased in all the patients with headache compared with the controls, and the increase was significant in patients with migraine. These data seem to confirm the hypothesis of abnormal processing of visual input in migraineurs and could be interpreted as neurophysiological support for the theory that different headache types are related conditions. Furthermore, the spectral analysis of steady-state pattern-reversal visual evoked potentials could be proposed as a test to diagnose migraine.

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“…A similar method of trace comparison has been used earlier. 25,[28][29][30][31] For that reason, 23 ordinates, equally spaced distribution, they were transformed to Fisher's z-scores to satisfy the normality assumption and used in Student's paired and nonpaired tests to establish possible statistical differences between patients and normals All necessary computations were carried out by preparing programs for the Acorn's BBC microcomputer…”

Section: Methodsmentioning

confidence: 99%

Pattern-Reversal Visual Evoked Potentials Recorded in Children with Generalized Epilepsy

Martinović

Ristanović

Đokić-Ristanović

et al. 1990

Clinical Electroencephalography

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Visual potentials evoked by pattern reversal (PRVEPs) were studied in 64 normal subjects (age range 7 to 15 years) and in 15 patients with primary generalized epilepsy (age range 8 to 13 years), 10 of whom were without anticonvulsant medication. Most of them were studied during sodium valproate (VPR) therapy and some during carbamazepine (CBZ) medication. A Quadristim set (Alvar) was used to present checkerboard patterns on a TV monitor, to amplify the EEG signals and to average and plot the evoked potentials. The potentials were elicited by binocular full-field 2/s checkerboard reversals, recorded from an electrode 4 cm above the inion, and analyzed for latency, amplitude and waveform. Our PRVEP measurements examined peak latency of positive P2 (or P100) component and trough-to-peak amplitude on N1P2 wave complex. The degree of similarity between pairs of PRVEP plots were determined by Pearson correlation coefficient r for an analysis time of 150 ms. In most of our patients, no pronounced influence of the disease itself on the parameters and waveform of the normal PRVEP pattern was demonstrated if anticonvulsant drugs were not taken. In patients who were under complete seizure control, the anticonvulsant did not change the PRVEP morphology as well. The PRVEP abnormality was most pronounced in patients who were taking anticonvulsant medication, but whose seizures were poorly controlled. This pattern distortion can be revealed by the correlation coefficient, but not by other PRVEP parameters. Therefore, this coefficient may be useful as a sensitive and objective measure both of PRVEP distortion and PRVEP improvement. Our results give further evidence that nondemyelinating disorders, but with synaptic transmission defects, can produce measurable changes in PRVEP morphology.

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Pattern-Reversal Visual Evoked Potentials in Normal 7- to 15-Year-Old Twins: A Correlation Analysis

Cited by 5 publications

References 8 publications

Pattern‐Reversal Visual Evoked Potentials in Migraineurs With or Without Visual Aura

Pattern‐Reversal Visual Evoked Potentials in Migraineurs With or Without Visual Aura

Spectral Analysis of Visual Potentials Evoked by Pattern‐Reversal Checkerboard in Juvenile Patients With Headache

Pattern-Reversal Visual Evoked Potentials Recorded in Children with Generalized Epilepsy

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