Complementing the Latest APA Definition of Hypnosis: Sensory-Motor and Vascular Peculiarities Involved in Hypnotizability

Santarcangelo, ‪Enrica Laura; Scattina, E.

doi:10.1080/00207144.2016.1171093

Cited by 36 publications

(49 citation statements)

References 70 publications

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“…Despite these limitations, this is the first study providing findings concerning the EEG representation of the integrated static vestibular/neck proprioceptive information. In addition, it indicates hypnotizability‐related differences in line with earlier observations of hypnotizability‐related differences in the sensorimotor domain (Santarcangelo & Scattina, ; Petri et al., ). Finally, it shows that TDA is more powerful than spectral analysis in capturing such differences.…”

Section: Limitations and Conclusionsupporting

confidence: 87%

“…Finally, it shows that TDA is more powerful than spectral analysis in capturing such differences. In conclusion, findings support the view that hypnotizability is associated with physiological characteristics apparently unrelated to the proneness to accept suggestions (Santarcangelo & Scattina, ), and thus, it may be relevant to additional aspects of everyday life.…”

Section: Limitations and Conclusionsupporting

confidence: 83%

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Spectral and topological analyses of the cortical representation of the head position: Does hypnotizability matter?

et al. 2019

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Introduction The aim of this exploratory study was to assess the EEG correlates of head positions (which have never been studied in humans) in participants with different psychophysiological characteristics, as encoded by their hypnotizability scores. This choice is motivated by earlier studies suggesting different processing of vestibular/neck proprioceptive information in subjects with high (highs) and low (lows) hypnotizability scores maintaining their head rotated toward one side ( RH ). Methods We analyzed EEG signals recorded in 20 highs and 19 lows in basal conditions (head forward) and during RH using spectral analysis, which captures changes localized to specific recording sites, and topological data analysis ( TDA ), which instead describes large‐scale differences in processing and representing sensorimotor information. Results Spectral analysis revealed significant differences related to head position for alpha 1, beta 2, beta 3, and gamma bands, but not to hypnotizability. TDA instead revealed global hypnotizability‐related differences in the strengths of the correlations among recording sites during RH . Significant changes were observed in lows on the left parieto‐occipital side and in highs in right frontoparietal region. Significant differences between the two groups were found in the occipital region, where changes were larger in lows than in highs . Conclusions This study reports finding of the EEG correlates of changes in the head posture for the first time, indicating that hypnotizability is related to the head posture representation/processing on large‐scale networks and that spectral and topological data analyses provide complementary results.

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Section: Limitations and Conclusionsupporting

confidence: 87%

Section: Limitations and Conclusionsupporting

confidence: 83%

Spectral and topological analyses of the cortical representation of the head position: Does hypnotizability matter?

et al. 2019

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“…Hypnotizability is measured by scales 32 that classify high, low and medium hypnotizable subjects (respectively Highs, Lows and Mediums) who often exhibit characteristics intermediate between Highs and Lows 33 . Different levels of hypnotizability have been associated with structural and functional brain peculiarities [34][35][36] , differences in sensorimotor integration and cardiovascular control 37 as well as in imagery abilities [38][39][40][41][42] and in the behavioral effects of imagery [43][44][45][46][47][48] . In particular, behavioural studies of the vestibulo-spinal reflex (VSR) suggested stronger FE in Highs 48 .…”

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confidence: 99%

Topology highlights mesoscopic functional equivalence between imagery and perception

Ibáñez‐Marcelo

Campioni

Phinyomark

et al. 2018

Preprint

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The functional equivalence between mental images and perception or motion has been proposed on the basis of neuroimaging evidence of large spatially overlapping activations between real and imagined sensori-motor conditions. However, similar local activation patterns do not imply the same mesoscopic integration of brain regions active during imagery and perception or action. Here we present the first EEG evidence of topological equivalence between functional network organization at intermediate and global scales during tasks. We show that the degree of functional equivalence varies in the population and is associated with different magnitudes in the restructuring of the functional connectivity between imagery and real tasks. In particular, changes observed during imagery with respect to basal conditions account for the cognitive effort experienced during imagery, and subjects characterized by stronger functional equivalence exhibit smaller topological deviations in the imagination tasks performed after real tasks, thus showing learning effects. Altogether, our findings point to different sensori-cognitive information processing in the subjects showing different functional equivalence. We anticipate our results to be a starting point for a novel dynamical description of functional equivalence, which will be relevant for socio-cognitive theories of embodiment and cognitive formulations of how different selves emerge from neurophysiological assets.

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“…In the absence of suggestions and out of hypnosis, highs show less strict postural control and less accurate visuomotor performance. The highs do not exhibit learning effects due to task repetition in both postural and visuomotor tasks [2]. In contrast to the general population, reports showed increased pain perception associated with increased amplitude of cortically evoked nociceptive potentials during transcranial anodal cerebellar stimulation in highs [15].…”

Section: Hypnotizability As a Psychophysiological Traitmentioning

confidence: 97%

“…Hypnotizability is a psychophysiological trait that is measured by scales predicting the proneness to modify perception, memory, and behavior according to specific instructions named "suggestions" [1]. Several cognitive, emotional, and physiological differences have been described between the subjects with high (highs) and low hypnotizability (lows) out of hypnosis and in the absence of specific suggestions [2].…”

Section: Introductionmentioning

confidence: 99%

Imagined and Actual Movements with and without Suggestions for anesthesia in Subjects with Different Hypnotizability

Ruggirello¹,

Santarcangelo²,

Sebastiani³

2019

obm icm

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Background: Hypnotizability is a psychophysiological trait associated with several differences including the level of functional equivalence (FE) between imagery and perception, i.e., the similarity of the cortical activations and network configurations associated with each of them. FE is stronger in high hypnotizability individuals (highs) than low hypnotizable participants (lows). In this framework, this study investigates the correlation between electroencephalogram (EEG) of imagined arm/hand movements (MI) and of actual movements performed in the absence of suggestions (M) and in the presence of suggestions of arm/hand anesthesia (MA) in highs and lows. Methods: The EEG alpha (8-12 Hz) and beta (13-25 Hz) absolute power, classically associated with movement preparation and execution, were studied in 18 highs and 17 lows classified according to the Stanford Hypnotic Susceptibility Scale, form A. EEG was recorded during M, MI, and MA. The subjective reports of imagery and the duration of movements were also studied. Results: The duration of movements did not differ between highs and lows. Highs reported better imagery during MI, greater perceived influence of the suggestion of anesthesia during MA, and lower cognitive efforts than lows for both tasks. In line with earlier studies, the spectral analysis did not reveal significant restructuring of the cortical activity during tasks in highs, whereas lows showed cortical changes during MI and MA indicating that they were able to mentally simulate movements and to accept suggestions for anesthesia during voluntary movement, despite their low hypnotizability scores. Conclusions: The present study indicates that unusual psychophysiological characteristics can differ in the response of individuals to suggestions.

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Complementing the Latest APA Definition of Hypnosis: Sensory-Motor and Vascular Peculiarities Involved in Hypnotizability

Cited by 36 publications

References 70 publications

Spectral and topological analyses of the cortical representation of the head position: Does hypnotizability matter?

Spectral and topological analyses of the cortical representation of the head position: Does hypnotizability matter?

Topology highlights mesoscopic functional equivalence between imagery and perception

Imagined and Actual Movements with and without Suggestions for anesthesia in Subjects with Different Hypnotizability

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