Inter- and intrahemispheric differences in the peak frequency of rhythmic activity within the alpha band

Pfurtscheller, Gert; Maresch, H.; Schuy, Stefan

doi:10.1016/0013-4694(77)90152-3

Cited by 28 publications

(8 citation statements)

References 11 publications

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“…The relative power minimizes errors created by differences in amplifier gain among channels and the effects of amplitude differences of noncerebral origin, such as those caused by varying skull thickness or asymmetrical inter‐electrode distance (Fisch, 1999). Moreover, comparing mean, median, and peak frequency within a band allows noting potential shifts toward the upper or the lower limits of the single bandwidth within individuals over time (Pfurtscheller et al. , 1977; Fisch, 1999).…”

Section: Discussionmentioning

confidence: 99%

“…The absolute mean frequency band can provide information on the dynamic changes of brain activities during pain, as well as the absolute median and peak frequencies. If the median frequency can indicate changes in the spectrum energy of the selected band, the peak frequency could be used to compare a selected frequency band between homotopic derivations, between individuals over time, or in response to medications, as occurs in humans (Pfurtscheller et al. , 1977).…”

Section: Discussionmentioning

confidence: 99%

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Effect of intravenous sodium salicylate administration prior to castration on plasma cortisol and electroencephalography parameters in calves

Bergamasco

Coetzee

Gehring

et al. 2011

Journal of Veterinary Pharmacology and Therapeutics

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Nociception is an unavoidable consequence of many routine management procedures such as castration in cattle. This study investigated electroencephalography (EEG) parameters and cortisol levels in calves receiving intravenous sodium salicylate in response to a castration model. Twelve Holstein calves were randomly assigned to the following groups: (i) castrated, untreated controls, (ii) 50 mg/kg sodium salicylate IV precastration, were blood sampled at 0, 5, 10, 20, 30, 45, 60, 90, 120, 150, 180, 240, 360, and 480 min postcastration. The EEG recording included baseline, castration, immediate recovery (0-5 min after castration), middle recovery (5-10 min after castration), and late recovery (10-20 min after castration). Samples were analyzed by competitive chemiluminescent immunoassay and fluorescence polarization immunoassay for cortisol and salicylate, respectively. EEG visual inspection and spectral analysis were performed. Statistical analyses included anova repeated measures and correlations between response variable. No treatment effect was noted between the two groups for cortisol and EEG measurements, namely an attenuation of acute cortisol response and EEG desynchronization in sodium salicylate group. Time effects were noted for EEG measurements, cortisol and salicylates levels. Significant correlations between cortisol and EEG parameters were noted. These findings have implications for designing effective analgesic regimens, and they suggest that EEG can be useful to monitor pain attributable to castration.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of intravenous sodium salicylate administration prior to castration on plasma cortisol and electroencephalography parameters in calves

Bergamasco

Coetzee

Gehring

et al. 2011

Journal of Veterinary Pharmacology and Therapeutics

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show abstract

“…However, the influence of the background activity on the low alpha coherencies should be less when the calculation error decreased. The effective bandwidth of 0.52 c/sec limited the possibility to detect differences in peak frequency between cortical areas (Pfurtscheller et al 1977) as well as to measure the smallest bandwidth which, according for example to Wennberg and Zetterberg (1971), could be under 0.7 c/sec. Probably a decrease of the effective bandwidth to about 0.3 c/sec is necessary to determine these details.…”

Section: Technical Aspectsmentioning

confidence: 99%

Normative spectral data on alpha rhythm in male adults

Wieneke¹,

Deinema²,

Spoelstra³

et al. 1980

Electroencephalography and Clinical Neurophysiology

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“…Through TSE and other time-frequency techniques, numerous studies have related frequency bands of EEG to specific cognitive mechanisms. In the case of the alpha band, originally, it was identified as an indicator of a neural area at rest 24 . However, some authors have argued that it may not exclusively reflect an idling status but can also play an active role in inhibitory control and timing of sensory processing 25 .…”

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confidence: 99%

Altered phase and nonphase EEG activity expose impaired maintenance of a spatial-object attentional focus in multiple sclerosis patients

Vázquez‐Marrufo

Sarrias-Arrabal

Martı́n-Clemente

et al. 2020

Sci Rep

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Some of the anatomical and functional basis of cognitive impairment in multiple sclerosis (MS) currently remains unknown. In particular, there is scarce knowledge about modulations in induced EEG (nonphase activity) for diverse frequency bands related to attentional deficits in this pathology. The present study analyzes phase and nonphase alpha and gamma modulations in 26 remitting-relapsing multiple sclerosis patients during their participation in the attention network test compared with twenty-six healthy controls (HCs) matched in sociodemographic variables. Behavioral results showed that the MS group exhibited general slowing, suggesting impairment in alerting and orienting networks, as has been previously described in other studies. Time–frequency analysis of EEG revealed that the gamma band was related to the spatial translation of the attentional focus, and the alpha band seemed to be related to the expectancy mechanisms and cognitive processing of the target. Moreover, phase and nonphase modulations differed in their psychophysiological roles and were affected differently in the MS and HC groups. In summary, nonphase modulations can unveil hidden cognitive mechanisms for phase analysis and complete our knowledge of the neural basis of cognitive impairment in multiple sclerosis pathology.

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Inter- and intrahemispheric differences in the peak frequency of rhythmic activity within the alpha band

Cited by 28 publications

References 11 publications

Effect of intravenous sodium salicylate administration prior to castration on plasma cortisol and electroencephalography parameters in calves

Effect of intravenous sodium salicylate administration prior to castration on plasma cortisol and electroencephalography parameters in calves

Normative spectral data on alpha rhythm in male adults

Altered phase and nonphase EEG activity expose impaired maintenance of a spatial-object attentional focus in multiple sclerosis patients

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