Topography of event-related potentials elicited by visual emotional stimuli

Laurian, S.; Bader, M. K. M.; Lanares, J.; Oros, Laura Beatriz

doi:10.1016/0167-8760(91)90033-t

Cited by 68 publications

(31 citation statements)

References 22 publications

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“…The right hemisphere has been linked to emotion processing (e.g., Keil et al 2001;Laurian et al 1991;Zhang and Zhou 2014). The right insula (BA 13), the right superior temporal gyrus (BA 22) and the right middle and superior frontal sulci (BAs 9 and 10) showed increased alpha activity during Zazen; these areas are part of the emotion circuitry of the brain (Gray et al 2002, Lutz et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Zazen meditation and no-task resting EEG compared with LORETA intracortical source localization

Faber¹,

Lehmann²,

Gianotti

et al. 2014

Cogn Process

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Meditation is a self-induced and willfully initiated practice that alters the state of consciousness. The meditation practice of Zazen, like many other meditation practices, aims at disregarding intrusive thoughts while controlling body posture. It is an open monitoring meditation characterized by detached moment-to-moment awareness and reduced conceptual thinking and self-reference. Which brain areas differ in electric activity during Zazen compared to task-free resting? Since scalp electroencephalography (EEG) waveforms are reference-dependent, conclusions about the localization of active brain areas are ambiguous. Computing intracerebral source models from the scalp EEG data solves this problem. In the present study we applied source modeling using low resolution brain electromagnetic tomography (LORETA) to 58-channel scalp EEG data recorded from 15 experienced Zen meditators during Zazen and no-task resting. Zazen compared to no-task resting showed increased alpha-1 and alpha-2 frequency activity in an exclusively right-lateralized cluster extending from prefrontal areas including the insula to parts of the somatosensory and motor cortices and temporal areas. Zazen also showed decreased alpha and beta-2 activity in the left angular gyrus and decreased beta-1 and beta-2 activity in a large bilateral posterior cluster comprising the visual cortex, the posterior cingulate cortex and the parietal cortex. The results include parts of the default mode network and suggest enhanced automatic memory and emotion processing, reduced conceptual thinking and self-reference on a less judgmental, i.e., more detached moment-to-moment basis during Zazen compared to no-task resting. Computing intracerebral source models from the scalp EEG data solves this problem. In the present study we applied source modeling using low resolution brain electromagnetic tomography (LORETA) to 58-channel scalp EEG data recorded from 15 experienced Zen meditators during Zazen and no-task resting. Zazen compared to no-task resting showed increased alpha-1 and alpha-2 frequency activity in an exclusively right-lateralized cluster extending from prefrontal areas including the insula to parts of the somatosensory and motor cortices and temporal areas. Zazen also showed decreased alpha and beta-2 activity in the left angular gyrus and decreased beta-1 and beta-2 activity in a large bilateral posterior cluster comprising the visual cortex, the posterior cingulate cortex and the parietal cortex. The results include parts of the default mode network and suggest enhanced automatic memory and emotion processing, reduced conceptual thinking and self-reference on a less judgmental, i.e., more detached moment-to-moment basis during Zazen compared to no-task resting.

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Section: Discussionmentioning

confidence: 99%

Zazen meditation and no-task resting EEG compared with LORETA intracortical source localization

Faber¹,

Lehmann²,

Gianotti

et al. 2014

Cogn Process

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“…This is a well-established finding, at least with respect to negative emotional valence. Empirical evidence is provided by studies in which words (Bryden & MacRae, 1988;Hartley, Ireland, Arnold, & Spencer, 1991;Richards, French, & Dowd, 1995), pictures (Johnsen & Hugdahl, 1993;Moretti, Charlton, & Taylor, 1996), or film clips (Wittling, 1995) were presented lateralized to healthy subjects; by neuropsychological investigations of patients with unilateral brain damage (Mandal, Tandon, & Asthana, 1991;Schmitt, Hartje, & Willmes, 1997); by psy-chophysiological studies using electrophysiological recordings (Laurian, Bader, Lanares, & Oros, 1991;Pihan, Altenmüller, & Ackermann, 1997;Spence, Shapiro, & Zaidel, 1996) or positron emission tomography measuring regional brain activation (George et al, 1996;Gur, Skolnick, & Gur, 1994;Lane et al, 1997); and by neurological investigations with the intracarotid sodium amytal test (Ahern et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

Dissociating Prelexical and Postlexical Processing of Affective Information in the Two Hemispheres: Effects of the Stimulus Presentation Format

2002

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Using a lexical decision task, the authors investigated whether brain asymmetries in the detection of emotionally negative semantic associations arise only at a perceptually discriminative stage at which lexical analysis is accurate or can already be found at crude and incomplete levels of perceptual representation at which word-nonword discrimination is based solely on guessing. Emotionally negative and neutral items were presented near perceptual threshold in the left and right visual hemifields. Word-nonword discrimination performance as well as the bias to classify a stimulus as a ''word'' (whether or not it actually is a word) were assessed for a normal, horizontal stimulus presentation format (Experiment 1) and for an unusual, vertical presentation format (Experiment 2). Results show that while the two hemispheres are equally able to detect affective semantic associations at a prelexical processing stage (both experiments), the right hemisphere is superior at a postlexical, perceptually discriminative stage (Experiment 2). Moreover, the findings suggest that only an unusual, nonoverlearned stimulus presentation format allows adequate assessment of the right hemisphere's lexical-semantic skills. © 2002 Elsevier Science (USA)

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“…Several studies have shown larger parietal late positive potentials (LPPs) in response to emotional stimuli, both pleasant and un pleasant, as compared to neutral stimuli (Cuthbert, Schupp, Bradley, Birbaumer, & Lang, 2000;Johnston, Miller, & Burleson, 1986;Keil et al, 2001Keil et al, , 2002Laurian, Bader, Lanares, & Oros, 1991;Mini, Palomba, Angrilli, & Bravi, 1996;Palomba, Angrilli, & Mini, 1997;Radilova`, 1982;Radilova`, Figar, & Radil, 1983, 1984Schupp et al, 2000). In a previous study that investigated ERPs in spider phobics when viewing feared compared to neutral stimuli, Gutberlet and Miltner (1999) found that the presentation of feared and fear relevant stimuli led to enhanced P300 ampli tudes for the feared object in the corresponding specific phobia group, that is, spider phobics showed enhanced P300 amplitudes for spiders but not for snakes, and snake phobics showed en hanced P300 amplitudes for snakes but not for spiders.…”

Section: Event-related Potentials In the Processing Of Emotional Stimulimentioning

confidence: 99%

Electrophysiological correlates of threat processing in spider phobics

et al. 2005

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The electrocortical correlates of the processing of feared/fear relevant and neutral stimuli were investigated in a pictorial emotional Stroop paradigm with spider phobic, social phobic, and nonphobic subjects. Subjects identified either the color of red or blue pictures of spiders, birds, or flowers (emotional Stroop task) or the object itself (identification task) by pressing different buttons. No emotional Stroop interference was found for spider phobic subjects when identifying the color of spiders as opposed to neutral stimuli. However, in the object identification task, spider phobic subjects identified spiders significantly faster than birds or flowers. Parietal P300 and P400 amplitudes were enhanced independent of task in spider phobic but not in nonphobic subjects when viewing pictures of spiders, which is consistent with previous studies showing that highly unpleasant and arousing pictures affect parietal late positive potentials.

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Topography of event-related potentials elicited by visual emotional stimuli

Cited by 68 publications

References 22 publications

Zazen meditation and no-task resting EEG compared with LORETA intracortical source localization

Zazen meditation and no-task resting EEG compared with LORETA intracortical source localization

Dissociating Prelexical and Postlexical Processing of Affective Information in the Two Hemispheres: Effects of the Stimulus Presentation Format

Electrophysiological correlates of threat processing in spider phobics

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