Hemispheric Specificity and Hypnotizability: An Overview of Ongoing EEG Research in South Australia

Macleod-Morgan, C.

doi:10.1007/978-1-4684-4913-6_14

Cited by 6 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These findings suggest that low hypnotizable people processed analytic information more asymmetrically than high hypnotizable people, and directly contradict the earlier findings of no laterality differences between high and low hypnotizable persons on analytic LH tasks. MacLeod-Morgan [71,72] failed to provide any cogent explanation for her findings. According to Perlini and Spanos [73], the findings regarding alpha rhythm may be difficult to interpret because MacLeod-Morgan's sample was heterogeneous, as it included hypnosis-practitioners and naïve subjects, and their laterality index was questionable.…”

Section: Eeg Alpha Hypnotizability and The Right Hemispherementioning

confidence: 87%

Hypnotizability-Related Asymmetries: A Review

Pascalis

Santarcangelo

2020

Symmetry

View full text Add to dashboard Cite

Hypnotizability is a dispositional trait reflecting the individual ability to modify perception, memory and behavior according to imaginative suggestions. It is measured by validated scales that classify the general population in high (highs), medium (mediums) and low (lows) hypnotizable persons, predicts the individual proneness to respond to suggestions, and is particularly popular in the field of the cognitive control of pain and anxiety. Different hypnotizability levels, however, have been associated with specific brain morpho-functional characteristics and with peculiarities in the cognitive, sensorimotor and cardiovascular domains also in the ordinary state of consciousness and in the absence of specific suggestions. The present scoping review was undertaken to summarize the asymmetries observed in the phenomenology and physiological correlates of hypnosis and hypnotizability as possible indices of related hemispheric prevalence. It presents the findings of 137 papers published between 1974 and 2019. In summary, in the ordinary state of consciousness, behavioral, neurophysiological and neuroimaging investigations have revealed hypnotizability related asymmetries mainly consisting of pre-eminent left hemisphere information processing/activation in highs, and no asymmetries or opposite directions of them in lows. The described asymmetries are discussed in relation to the current theories of hypnotizability and hypnosis.

show abstract

Section: Eeg Alpha Hypnotizability and The Right Hemispherementioning

confidence: 87%

Hypnotizability-Related Asymmetries: A Review

Pascalis

Santarcangelo

2020

Symmetry

View full text Add to dashboard Cite

show abstract

“…In this vein, MacLeod-Morgan (1979) reported that high-hypnotizable people showed greater lateralization, according to the alpha ration, than low-hypnotizable ones. Furthermore, it was suggested (MacLeod-Morgan, 1982) that hypnosis is a right-hemispheric task, although this suggestion has not been consistently replicated (MacLeod-Morgan, 1985). Consistent with this view, LaBriola, Karlin, and Goldstein (1987) reported that high-hypnotizable people displayed increased relative right hemispheric activation during hypnosis whereas low-hypnotizable people did not.…”

mentioning

confidence: 99%

EEG concomitants of hypnosis and hypnotic susceptibility.

Graffin¹,

Ray²,

Lundy³

1995

Journal of Abnormal Psychology

117

View full text Add to dashboard Cite

Electroencephalograph (EEG) measures described high- and low-hypnotizable participants in terms of 3 conditions: an initial baseline period; baselines preceding and following a standard hypnotic induction; and during the induction. The following results were obtained. 1. High and low-hypnotic susceptible participants displayed a differential pattern of EEG activity during the baseline period, characterized by greater theta power in the more frontal areas of the cortex for the high-susceptible participants. 2. In the period preceding and following a standardized hypnotic induction, low-susceptible participant displayed an increase in theta activity, whereas high-susceptible participants displayed a decrease. 3. During the actual hypnotic induction itself, theta power significantly increased for both groups in the more posterior areas of the cortex, whereas alpha activity increased across all sites. Implications of these data include the possibility of psychophysiological measures offering a stable marker for hypnotizability, and anterior/posterior cortical differences being more important than hemispheric foci for understanding hypnotic processes.

show abstract

“…Early investigations into EEG patterns during hypnosis reported an increased occurrence of occipital alpha waves in HHs compared to LHs [193][194][195][196][197][198]. Later studies have reported increased alpha activity in HHs during hypnosis [199], as well as after the hypnotic induction procedure [200][201][202]. However, findings from later studies failed to detect an increase in alpha activity with hypnosis [165,203].…”

Section: Eeg Oscillations and Their Associations With Hypnotizability...mentioning

confidence: 99%

Brain Functional Correlates of Resting Hypnosis and Hypnotizability: A Review

De Pascalis

2024

Brain Sciences

View full text Add to dashboard Cite

This comprehensive review delves into the cognitive neuroscience of hypnosis and variations in hypnotizability by examining research employing functional magnetic resonance imaging (fMRI), positron emission tomography (PET), and electroencephalography (EEG) methods. Key focus areas include functional brain imaging correlations in hypnosis, EEG band oscillations as indicators of hypnotic states, alterations in EEG functional connectivity during hypnosis and wakefulness, drawing critical conclusions, and suggesting future research directions. The reviewed functional connectivity findings support the notion that disruptions in the available integration between different components of the executive control network during hypnosis may correspond to altered subjective appraisals of the agency during the hypnotic response, as per dissociated and cold control theories of hypnosis. A promising exploration avenue involves investigating how frontal lobes’ neurochemical and aperiodic components of the EEG activity at waking-rest are linked to individual differences in hypnotizability. Future studies investigating the effects of hypnosis on brain function should prioritize examining distinctive activation patterns across various neural networks.

show abstract

Hemispheric Specificity and Hypnotizability: An Overview of Ongoing EEG Research in South Australia

Cited by 6 publications

References 13 publications

Hypnotizability-Related Asymmetries: A Review

Hypnotizability-Related Asymmetries: A Review

EEG concomitants of hypnosis and hypnotic susceptibility.

Brain Functional Correlates of Resting Hypnosis and Hypnotizability: A Review

Contact Info

Product

Resources

About