The dynamics of phase relationships of alpha waves during photic driving

Kawaguchi, Takahiko; Jijiwa, Hiroyasu; Watanabe, Satoru

doi:10.1016/0013-4694(93)90115-c

Cited by 32 publications

(17 citation statements)

References 27 publications

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“…However, a previous study reported that the muscarinic antagonist (scopolamine) elevates contrast detection thresholds uniformly at all temporal frequencies, while nicotine lowers thresholds at high but not low temporal frequency [37]. Further studies are needed to clarify the role of acetylcholine not only in the visual system, but also in the thalamo-cortico-thalamic reverberating circuit which is thought to participate in the development and maintenance of PDRs [18].…”

Section: Discussionmentioning

confidence: 99%

“…Recent studies of quantitative EEG analysis have shown abnormal PDRs in patients with DAT [15,16] and schizophrenia [17]. Although the neurochemical correlates of PDR generation are unclear, the thalamocortico-thalamic reverberating circuit is thought to participate in the development and maintenance of PDRs [18]. There have been electrophysiological studies suggesting that acetylcholine plays an important role in the mechanisms underlying neuronal response to visual stimulation of the lateral geniculate thalamic nucleus [19,20] and visual cortex [21] in cats.…”

Section: Introductionmentioning

confidence: 99%

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EEG Changes following Scopolamine Administration in Healthy Subjects

et al. 1999

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This study examined the effects of the anticholinergic drug, scopolamine (0.25 mg) in 16 right-handed healthy volunteers. EEGs were recorded before and 60 min after intramuscular administration, and spectral analysis was performed on EEGs recorded at rest and during photic stimulation. Each subject was also evaluated by the Wechsler Memory Scale (WMS; form 1 or 2) before and 90 min after drug administration. In the resting EEG, the scopolamine administration resulted in a significant increase in the absolute power on the delta band (2.0– 3.8 Hz) and in the relative power on the delta and theta-1 bands (4.0–5.8 Hz) mainly over the central and parieto-occipital regions. In contrast, scopolamine significantly decreased the relative alpha-2 band (9.2–12.8 Hz) power mainly over the frontal regions and the absolute alpha-2 band power at most of the recording sites. The analysis of stimulus data showed that scopolamine significantly decreased fundamental photic driving responses elicited by photic stimulation at 15 Hz, with significant effects confined to the occipital regions. These EEG changes occurred in association with a significant reduction in total WMS scores as well as in scores of logical and visual memory subtests. These findings suggest that, in addition to cognitive impairments, central cholinergic dysfunction can cause EEG changes under both nonstimulus and stimulus conditions.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

EEG Changes following Scopolamine Administration in Healthy Subjects

et al. 1999

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“…According to classical theories [47], the photic driving response is a resonance between spontaneous rhythms of the brain and visually evoked responses. A number of studies indicated the possibility of 'entraining' specific frequencies of brain waves by presenting subjects with frequency-specific flickering lights [21,26]. In the EEG functional tests, EEG photic driving response is routinely used to uncover potential epileptic-form abnormalities [28], as a sensitive neurophysiological measure used to assess drug effects to treat Parkinson disease [11] and sleep deprivation [7] and schizophrenia [19].…”

Section: Introductionmentioning

confidence: 99%

EEG inter/intra-hemispheric coherence and asymmetric responses to visual stimulations

Cvetković

Cosic

2009

Med Biol Eng Comput

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This study has attempted to increase the meaning and significance of findings in the experimental areas of electroencephalographic (EEG) visual or photic driving. The aim of this study was to investigate whether the visual stimulation at particular extremely low frequency order could possibly induce changes in the corresponding EEG frequency bands by examining the functional connectedness between brain regions. This was evaluated by applying the improved experimental protocol and objective using non-parametric spectral estimation coherence algorithm. The findings from our study revealed a significantly higher coherence in the EEG beta2 band (16.6 Hz) corresponding to 16.66 Hz visual stimulation, suggesting a high inter-hemispheric functional connectivity during visual stimulus. A significant increase was revealed during 50 Hz visual stimulation at gamma band and a decrease during 4 Hz visual stimulation at theta band, linked with a substantial transitional shift in predominance from anterior to posterior relative power. This study may also increase the awareness of EEG visual driving response studies in clinical practice to uncover potential neurophysiologic abnormalities.

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“…However, most of them debated the amplitude or power values of alpha activity or photic driving response by each separate electrode. Although only Kawaguchi et al [12] mentioned interelectrode phase differences, they studied only 2 electrodes which were located at inter-hemispherical symmetric sites [12].…”

Section: Introductionmentioning

confidence: 99%

“…There have been many reports on the change in EEG due to photic stimulation and many arguments about photic driving response in relation to alpha activity, mechanisms and physiological meanings [7][8][9][10][11][12]. However, most of them debated the amplitude or power values of alpha activity or photic driving response by each separate electrode.…”

Section: Introductionmentioning

confidence: 99%

Spatial Structure of Brain Electric Fields during Intermittent Photic Stimulation

et al. 2001

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EEG changes in 27 young healthy male right-handed volunteers on intermittent photic stimulation (IPS) were estimated using global field power (GFP), EEG microstate modeling and analysis (EMMA), and low-resolution electromagnetic brain tomography (LORETA). The GFP significantly increased at flashing frequency and high harmonics. Three model maps were extracted with the EMMA procedure, from which high alternation rates of each microstate were observed. Moreover, two of the three model maps contributed very highly, occurring most frequently. LORETA imaging of the three model maps obtained from the EMMA procedure showed that both visual dominant cortical areas were activated, especially in the left hemisphere. These results suggest that IPS does not cause peculiar spatial configurations of the brain electric field, but does cause acceleration and deviation of the microstate alternation. Also, a functional laterality between hemispheres might be enhanced by symmetric IPS.

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The dynamics of phase relationships of alpha waves during photic driving

Cited by 32 publications

References 27 publications

EEG Changes following Scopolamine Administration in Healthy Subjects

EEG Changes following Scopolamine Administration in Healthy Subjects

EEG inter/intra-hemispheric coherence and asymmetric responses to visual stimulations

Spatial Structure of Brain Electric Fields during Intermittent Photic Stimulation

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