Cortical event-related potentials show the structure of hypnotic suggestions is crucial

Brain Functional Correlates of Resting Hypnosis and Hypnotizability: A Review

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.

Hypnotic Induction of Deafness to Elementary Sounds: An Electroencephalography Case-Study and a Proposed Cognitive and Neural Scenario

Hypnosis can be conceived as a unique opportunity to explore how top-down effects can influence various conscious and non-conscious processes. In the field of perception, such modulatory effects have been described in distinct sensory modalities. In the present study we focused on the auditory channel and aimed at creating a radical deafness to elementary sounds by a specific hypnotic suggestion. We report here a single case-study in a highly suggestible healthy volunteer who reported a total hypnotically suggested deafness. We recorded high-density scalp EEG during an auditory odd-ball paradigm before and after hypnotic deafness suggestion. While both early auditory event-related potentials to sounds (P1) and mismatch negativity component were not affected by hypnotic deafness, we observed a total disappearance of the late P3 complex component when the subject reported being deaf. Moreover, a centro-mesial positivity was present exclusively during the hypnotic condition prior to the P3 complex. Interestingly, source localization suggested an anterior cingulate cortex (ACC) origin of this neural event. Multivariate decoding analyses confirmed and specified these findings. Resting state analyses confirmed a similar level of conscious state in both conditions, and suggested a functional disconnection between auditory areas and other cortical areas. Taken together these results suggest the following plausible scenario: (i) preserved early processing of auditory information unaffected by hypnotic suggestion, (ii) conscious setting of an inhibitory process (ACC) preventing conscious access to sounds, (iii) functional disconnection between the modular and unconscious representations of sounds and global neuronal workspace. This single subject study presents several limits that are discussed and remains open to alternative interpretations. This original proof-of-concept paves the way to a larger study that will test the predictions stemming from our theoretical model and from this first report.

Towards a multi-brain framework for hypnosis: a review of quantitative methods

Most real-world applications of hypnosis involve a pair of actors: a hypnotist and a subject. Accordingly, most current models of hypnosis acknowledge the relevance of social factors in the development of the hypnotic response. Yet, psychophysiological research on hypnosis has been mostly restricted to techniques that are studying one individual, neglecting the complexity of hypnosis as a social phenomenon. In this paper, we review evidence suggesting that a multi-brain approach to studying the psychophysiology of hypnosis could lead to a breakthrough in our understanding of the neural correlates of hypnosis. In particular, we aim to highlight how this approach which relies on the information conveyed by complex verbal stimuli can be utilized to deal with the multifaceted nature of hypnosis. Furthermore, we present analytical approaches to assessing brain-to-brain coupling developed in the field of social cognitive neuroscience in the past decade, to aid the design of similar multi-brain studies in hypnosis research.

Suggested deafness during hypnosis and simulation of hypnosis compared to a distraction and control condition: A study on subjective experience and cortical brain responses

Hypnosis is a powerful tool to affect the processing and perception of stimuli. Here, we investigated the effects of hypnosis on the processing of auditory stimuli, the time course of event-related-potentials (ERP; N1 and P3b amplitudes) and the activity of cortical sources of the P3b component. Forty-eight participants completed an auditory oddball paradigm composed of standard, distractor, and target stimuli during a hypnosis (HYP), a simulation of hypnosis (SIM), a distraction (DIS), and a control (CON) condition. During HYP, participants were suggested that an earplug would obstruct the perception of tones and during SIM they should pretend being hypnotized and obstructed to hear the tones. During DIS, participants' attention was withdrawn from the tones by focusing participants' attention onto a film. In each condition, subjects were asked to press a key whenever a target stimulus was presented. Behavioral data show that target hit rates and response time became significantly reduced during HYP and SIM and loudness ratings of tones were only reduced during HYP. Distraction from stimuli by the film was less effective in reducing target hit rate and tone loudness. Although, the N1 amplitude was not affected by the experimental conditions, the P3b amplitude was significantly reduced in HYP and SIM compared to CON and DIS. In addition, source localization results indicate that only a small number of neural sources organize the differences of tone processing between the control condition and the distraction, hypnosis, and simulation of hypnosis conditions. These sources belong to brain areas that control the focus of attention, the discrimination of auditory stimuli, and the organization of behavioral responses to targets. Our data confirm that deafness suggestions significantly change auditory processing and perception but complete deafness is hard to achieve during HYP. Therefore, the term 'deafness' may be misleading and should better be replaced by 'hypoacusis'.

Hypnotic Ego-strengthening: Where We've Been and the Road Ahead

The use of hypnotic ego-strengthening techniques in psychological and medical treatment has been widespread in the fields of psychotherapy, nursing, dentistry, medicine, psychiatry, and related fields. The term "ego-strengthening" became part of the clinical hypnosis literature with the publication of John Hartland's ego-strengthening script in the 1960's. Since then numerous clinicians have utilized and modified Hartland's script, and developed other ego-strengthening scripts as well. Research has demonstrated that ego-strengthening suggestions and scripts can enhance treatment effects. Early versions of ego-strengthening suggestions tended to be verbal and authoritarian in nature while later developments added imagery and emphasized projective/evocative scripts with the purpose of accessing internal resources. Currently, in most hypnosis case studies and research articles, some form of ego-strengthening is an important aspect of the treatment plan.

Prolonged exposure to highly rhythmic music affects brain dynamics and perception

Rhythmic stimulation is a powerful tool to improve temporal prediction and parsing of the auditory signal. However, for long duration of stimulation, the rhythmic and repetitive aspects of music have often been associated to a trance state. In this study we conceived an auditory monitoring task that allows tracking changes of psychophysical auditory thresholds. Participants performed the task while listening to rhythmically regular and an irregular (scrambled but spectrally identical) music that were presented with an intermittent (short) and continuous (long) type of stimulation. Results show that psychophysical auditory thresholds increase following a Continuous versus Intermittent stimulation and this is accompanied by a reduction of the amplitude of two event-related potentials to target stimuli. These effects are larger with regular music, thus do not simply derive from the duration of stimulation. Interestingly, they seem to be related to a frequency selective neural coupling as well as an increase of network connectivity in the alpha band between frontal and central regions. Our study shows that the idea that rhythmic presentation of sensory stimuli facilitates perception might be limited to short streams, while long, highly regular, repetitive and strongly engaging streams may have an opposite perceptual impact.

AUDITORY EVOKED POTENTIALS EVIDENCE FOR DIFFERENCES IN INFORMATION PROCESSING BETWEEN HIGH AND LOW HYPNOTIZABLE SUBJECTS

N100 and P300 auditory evoked potentials in 2-stimulus oddball paradigm were analyzed in high (HH, n = 18) and low (LH, n = 15) hypnotizable participants under waking condition. LH subjects committed more errors than HH subjects. HH subjects demonstrated shorter N100 latencies at frontal electrodes and significant N100 differences between target and nontarget stimuli (higher N100 amplitude and increased latency at parietal sites to targets vs. nontargets), whereas LH subjects failed to show any differences. The overall increase of P300 amplitude with frontal-central localization of P300 maximum was found in HH subjects compared to LH subjects. The obtained results support the psychophysiological model of HH individuals having more effective frontal attentional systems involved in detecting, integrating, and filtering relevant information.

Synaesthesia-type associations and perceptual changes induced by hypnotic suggestion

Are synaesthetic experiences congenital and so hard-wired, or can a functional analogue be created? We induced an equivalent of form-colour synaesthesia using hypnotic suggestions in which symbols in an array (circles, crosses, squares) were suggested always to have a certain colour. In a Stroop type-naming task, three of the four highly hypnotizable participants showed a strong synaesthesia-type association between symbol and colour. This was verified both by their subjective reports and objective eye-movement behaviour. Two resembled a projector- and one an associator-type synaesthete. Participant interviews revealed that subjective experiences differed somewhat from typical (congenital) synaesthesia. Control participants who mimicked the task using cognitive strategies showed a very different response pattern. Overall, the results show that the targeted, preconsciously triggered associations and perceptual changes seen in association with congenital synaesthesia can rapidly be induced by hypnosis. They suggest that each participant’s subjective experience of the task should be carefully evaluated, especially when studying hypnotic hallucinations. Studying such experiences can increase understanding of perception, automaticity, and awareness and open unique opportunities in cognitive neuroscience and consciousness research.

The Power of mind: Blocking visual perception by hypnosis

The present study investigated the effects of suggestion on the processing of visual stimuli. Participants counted rare visual stimuli presented on a screen, once during a hypnosis condition where they were suggested that their vision of the screen is blocked by a virtual wooden board in front of their eyes and once during a control condition without suggestion. In the hypnosis condition, counting performance was about 20% worse than in the control condition. At the same time, the P3b amplitude of the event-related brain potential was about 37% reduced. Smaller P3b amplitudes were significantly associated with deficient counting performance, and this effect was largest in participants who reported the blockade as real. In contrast, earlier brain responses (N1, P2) that reflect basic processing of the visual stimuli were not affected by the suggested blockade. We conclude that the suggestion of the blockade affects later stages of visual perception, leaving early processes intact. This illustrates the impact of suggestions and the power of mind.

Hypnosis in Cancer Care

Cancer affects a growing proportion of the population as survival improves. The illness and its treatment brings a substantial burden of symptoms, including pain, anxiety, insomnia, and grief. Here, the uses of hypnosis in the treatment of these cancer-related problems will be reviewed. The utility of measuring hypnotizability in the clinical setting will be discussed. The current neurobiology of hypnotizability and hypnosis will be reviewed. Methods and results of using hypnosis for pain control in acute and chronic settings will be presented. Effects of hypnotic analgesia in specific brain regions associated with pain reduction, notably the dorsal anterior cingulate cortex and the somatosensory cortex, underlies its utility as a potent and side-effect free analgesic. Methods for helping those with cancer to better manage their anxiety, insomnia, and grief will be described. These involve facing disease-related stressors while dissociating the experience from somatic arousal. Given the serious complications of medications widely used to treat pain, anxiety, and insomnia, this article provides methods and an evidence base for wider use of techniques involving hypnosis in cancer care. Altering patients' perception of pain, disease-related stress, and anxiety can help change the reality of their life with cancer.

The future of professional hypnosis: comment on kirsch, mazzoni, and montgomery

I believe the paper by Kirsch, Mazzoni, and Montgomery (this issue) should surprise about 95% of ASCH members (maybe only 93% of SCEH members) because the three facts espoused in their paper speciously seem to be 100% true. To paraphrase from their abstract: 1) nothing that can be produced by hypnotic induction plus suggestion cannot also be produced by suggestion alone; 2) administration of a hypnotic induction does not produce a meaningful increase in response to suggestion relative to suggestion alone; and 3) responsivity to suggestions are highly correlated to responsivity on the same measure when preceded by a hypnotic induction ceremony. In order to persuade that these propositions are true, several objections to them must be addressed. However, just because one's facts are true does not mean that one's interpretation of the facts and their interrelationships are also true. The ramifications of the above facts and their interrelationships for the future of professional hypnosis (experimental, clinical and forensic) are identified and discussed.

Induction Technique: Beyond Simple Response to Suggestion

The hypnotic induction is intended to induce hypnosis. This implies that what is sought is intended to go beyond what might be wrought by mere suggestion, expectancy, and social influence. The experimentally controlled research showing that the induction makes a difference and how small changes in wording of suggestions can produce orthogonal responses is briefly reviewed. This article explains the principles of induction and three critical phases of hypnotic induction in detail. An arm levitation scripted protocol demonstrating how to respond to the patient using the three phases to maximize responses to hypnotic suggestions is presented.

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

The aim of this article is to complement the recently revised American Psychological Association (APA) definition of hypnotizability. It (a) lists a few differences in sensorimotor integration between subjects with high (highs) and low (lows) hypnotizability scores in the ordinary state of consciousness and in the absence of suggestions, (b) proposes that hypnotizability-related cerebellar peculiarities may account for them,

Hypnotic Olfactory Hallucinations

Olfactory hallucinations (smelling odors that are not present) are intrusive and disruptive yet challenging to investigate because they cannot be produced on demand. In this study, the authors attempted to model olfactory hallucinations using hypnotic suggestions. We gave some subjects a suggestion to smell an odor in the absence of a real odor (positive hallucination) and gave others a suggestion to smell nothing in the presence of a real odor (negative hallucination). High hypnotizable individuals who received the positive hallucination reported intense smells whereas those who received the negative hallucination reported a reduction in intensity. These suggestions also influenced later recall about frequency of odor presentation. Findings are discussed in terms of reality monitoring and differences between positive and negative hallucinations.

Role of Beliefs About Hypnotic States as a Moderator Variable: A Reexamination of the Relationship Between Reactance and Hypnotizability

The hypothesis that beliefs about hypnosis determine the amount of psychological reactance aroused was tested. Participants were administered a measure of trait reactance to therapist directives (Therapeutic Reactance Scale; TRS), the Beliefs about Hypnotic State Questionnaire (BHSQ-R), and behavioral and subjective scales concerning hypnotic response. Hierarchical multiple regressions revealed significant interactions between BHSQ-R subscales and TRS. The findings suggest that the arousal of psychological reactance to hypnosis is determined by individuals' trait reactance levels acting together with their interpretations of the hypnotic situation. The role of beliefs about hypnotic states as a moderator of the relationship between personality and hypnotizability was discussed.

Preferences for descriptors of hypnosis: the international point of view

Despite the apparently definitive findings of the Christensen (2005) survey of published members of the Society for Clinical and Experimental Hypnosis (SCEH), disagreement about which term best describes the capacity to experience hypnosis and theoretical preference has continued. SCEH, although international, represents primarily North Americans. Preferences of international clinicians and researchers were inadequately represented, so the authors surveyed preferences from attendees of the International Congress of the International Society of Hypnosis in 2012 in Bremen, Germany. The term trance, translated as trance capacity or trance ability for this study, was overwhelmingly preferred over the other options. Hypnosis was recognized as an identifiable state by 88.46% of respondents, whereas only 11.54% viewed it as a sociocognitive phenomenon (role-play, expectancy, etc.).

Hypnosis, suggestion, and suggestibility: an integrative model

This article elucidates an integrative model of hypnosis that integrates social, cultural, cognitive, and neurophysiological variables at play both in and out of hypnosis and considers their dynamic interaction as determinants of the multifaceted experience of hypnosis. The roles of these variables are examined in the induction and suggestion stages of hypnosis, including how they are related to the experience of involuntariness, one of the hallmarks of hypnosis. It is suggested that studies of the modification of hypnotic suggestibility; cognitive flexibility; response sets and expectancies; the default-mode network; and the search for the neurophysiological correlates of hypnosis, more broadly, in conjunction with research on social psychological variables, hold much promise to further understanding of hypnosis.

Top-down regulation of left temporal cortex by hypnotic amusia for rhythm: a pilot study on mismatch negativity

To evaluate the effect of hypnotically induced amusia for rhythm (a condition in which individuals are unable to recognize melodies or rhythms) on mismatch negativity (MMN), 5 highly (HH) and 5 poorly (LH) hypnotizable nonmusician volunteers underwent MMN recording before and during a hypnotic suggestion for amusia. MMN amplitude was recorded using a 19-channel montage and then processed using the low-resolution electromagnetic tomography (LORETA) to localize its sources. MMN amplitude was significantly decreased during hypnotic amusia (p < .04) only in HH, where the LORETA maps of MMN showed a decreased source amplitude in the left temporal lobe, suggesting a hypnotic top-down regulation of activity of these areas and that these changes can be assessed by neurophysiological investigations.

Posthypnotic suggestion alters conscious color perception in an automatic manner

The authors studied whether a posthypnotic suggestion to see a brief, masked target as gray can change the color experience of a hypnotic virtuoso. The visibility of the target was manipulated by varying the delay between the target and the mask that followed it. The virtuoso's subjective reports indicated that her conscious color experience was altered already at short delays between the target and the subsequent mask. The virtuoso's objectively measured pattern of responding under posthypnotic suggestion could not be mimicked either by control participants nor the virtuoso herself. Due to posthypnotic amnesia, the virtuoso was unaware of suggestions given during hypnosis. Importantly, the virtuoso could not alter her color perception without a hypnotic suggestion. These results suggest that hypnosis can affect even a highly automatic process such as color perception.

An eye for an I: a 35-year-old woman with fluctuating oculomotor deficits and dissociative identity disorder

Physiologic changes, including neurological or pseudo-neurological symptoms, occur across identity states in dissociative identity disorder DID) and can be objectively measured. The idea that dissociative phenomena might be associated with changes in brain function is consistent with research on the brain effects of hypnosis. The authors report a case of psycho-physiologic differences among 4 alter personalities manifested by a 35-year-old woman with DID. Differences in visual acuity, frequency of pendular nystagmus, and handedness were observed in this patient both when the alter personalities appeared spontaneously and when elicited under hypnosis. The authors consider several diagnostic possibilities for these findings and discuss whether prevailing treatment recommendations for DID patients could possibly be modified to ameliorate such visual and neurologic symptoms.

Neuro-hypnotism: prospects for hypnosis and neuroscience

The neurophysiological substrates of hypnosis have been subject to speculation since the phenomenon got its name. Until recently, much of this research has been geared toward understanding hypnosis itself, including the biological bases of individual differences in hypnotizability, state-dependent changes in cortical activity occurring with the induction of hypnosis, and the neural correlates of response to particular hypnotic suggestions (especially the clinically useful hypnotic analgesia). More recently, hypnosis has begun to be employed as a method for manipulating subjects' mental states, both cognitive and affective, to provide information about the neural substrates of experience, thought, and action. This instrumental use of hypnosis is particularly well-suited for identifying the neural correlates of conscious and unconscious perception and memory, and of voluntary and involuntary action.

The sociocognitive and dissociation theories of hypnosis: toward a rapprochement

In this introductory article to a special issue on the sociocognitive perspective of hypnosis, the authors contrast two influential hypnosis theories-the sociocognitive and dissociation perspectives-and argue that recent developments in sociocognitive theory (i.e., response set theory) and in the broader field of cognitive psychology pertaining to nonconscious information processing and goal-directed action make possible a rapprochement between theoretical accounts that have vied for attention and empirical support.

Trance state effects and imagery vividness before and during a hypnotic assessment: a preliminary study

This preliminary study explored the relationship between imagery vividness before and during a hypnotic phenomenological assessment procedure, the Phenomenology of Consciousness Inventory-Hypnotic Assessment Procedure (PCI-HAP), while also assessing trance (hypnoidal) state effects and several other variables. The PCI-HAP allows the assessment of trance state effects associated with hypnotism to be quantified and statistically assessed. The 102 subjects completed the PCI-HAP along with several other questionnaire items. Correlational and regression analyses suggested that imagery vividness during hypnotism (hypnotic imagoic suggestibility) was predicted by combined imagery vividness before hypnotism and trance (altered) state effects during hypnotism. When measuring several additional variables, imagery vividness during hypnotism was found to be a function of self-reported hypnotic depth and additional other variables. The usefulness of these results for better understanding imagery vividness before and during hypnotism is discussed.

Efficacy of hypnosis in the treatment of human papillomavirus (HPV) in women: rural and urban samples

This article investigates the effect of hypnosis on immunity and whether this is the key mechanism in the hypnotic treatment of the genital infection caused by human papillomavirus (HPV). HPV is the most common sexually transmitted disease and can lead to cervical and other cancers. Current medical treatments are aimed at tissue assault (acids, freezing, surgery). Medical wart clearance rates are only 30% to 70% and recurrence is common. Our research contrasted hypnosis-only with medical-only therapies, using both urban hospital and rural community samples. Both hypnosis and medical therapy resulted in a statistically significant (p < .04) reduction in areas and numbers of lesions. Yet, at the 12-week follow-up, complete clearance rates were 5 to 1 in favor of hypnosis.

Effects of an affect bridge for age regression

The authors tested tailored hypnotic inductions for age regression with an affect bridge to access meaning-laden events. They used emotional intensity, spontaneity, elaboration, and transitional-object measures to assess the genuineness of the topographic shift to primary process characteristic of hypnotic age regression. An affect bridge was used to access stressful events within the age range of 3 to 6 years. The Stanford Hypnotic Susceptibility Scale, Form C was administered to determine high hypnotizables-reals, (n = 8, scores 9-12) and low hypnotizables-simulators, (n = 8, scores 3 or less). The groups behaved differently on frequency of transitional objects, spontaneity, and intensity but not on elaboration. The hypnotizable-reals but not the simulators produced a plethora of primary-process childlike affective responses that could not be produced by the role-playing simulators.

Hypnotic illusions and clinical delusions: a hypnotic paradigm for investigating delusions of misidentification

In 2 experiments, the authors created a hypnotic analogue of delusions of misidentification and explored their impact on autobiographical memory. In Experiment 1, to establish the paradigm, high and low hypnotizable participants were given a suggestion to become someone similar or dissimilar to themselves. In Experiment 2, to further test the paradigm and to examine autobiographical remembering, highs were given a suggestion to become a same-sex sibling, administered 2 challenges to the temporary delusion, and asked to generate autobiographical memories. For high hypnotizable participants, the suggested delusions of misidentification were compelling and resistant to challenge. During these temporary delusions, participants generated specific autobiographical memories that reflected previously experienced events viewed from the perspective of the suggested identity. These findings highlight the instrumental value of hypnosis to the investigation and understanding of delusions and autobiographical memory.

Hypnobo: perspectives on hypnosis and placebo

Hypnosis and placebo share in phenomenology. While hypnosis-like phenomena have a documented history going back thousands of years, accounts of placebo effects span several centuries. With the rise of biological psychiatry and the "pharmacological revolution," drug trials have taken a central place in clinical research. These clinical trials increasingly incorporate placebo-controlled conditions as part of their paradigms and may even involve an element of deception. In contrast, the therapeutic effects of hypnosis do not require deception. As researchers begin to identify genetic and neural correlates of hypnotizability, these findings may further elucidate placebo phenomena. Whereas identifying highly hypnotizable individuals may be of limited interest, identifying good placebo responders may revolutionize both basic research and clinical science, offer insights into transcultural psychiatry and elucidate individual differences.

The future of professional hypnosis: comment on Kirsch, Mazzoni, and Montgomery

I believe the paper by Kirsch, Mazzoni and Montgomery (this issue) should surprise about 95% of ASCH members (maybe only 93% of SCEH members) because the three facts espoused in their paper speciously seem to be 100% true. To paraphrase from their abstract: 1) nothing that can be produced by hypnotic induction plus suggestion cannot also be produced by suggestion alone; 2) administration of a hypnotic induction does not produce a meaningful increase in response to suggestion relative to suggestion alone; and 3) responsivity to suggestions are highly correlated to responsivity on the same measure when preceded by a hypnotic induction ceremony. In order to persuade that these propositions are true, several objections to them must be addressed. However, just because one's facts are true does not mean that one's interpretation of the facts and their interrelationships are also true. The ramifications of the above facts and their interrelationships for the future of professional hypnosis (experimental, clinical and forensic) are identified and discussed.

Types of suggestibility: Relationships among compliance, indirect, and direct suggestibility

It is commonly believed that direct suggestibility, referring to overt influence, and indirect suggestibility, in which the intention to influence is hidden, correlate poorly. This study demonstrates that they are substantially related, provided that they tap similar areas of influence. Test results from 103 students, 55 women and 48 men, were entered into regression analyses. Indirect suggestibility, as measured by the Sensory Suggestibility Scale for Groups, and compliance, measured by the Gudjonsson Compliance Scale, were predictors of direct suggestibility, assessed with the Barber Suggestibility Scale. Spectral analyses showed that indirect suggestibility is more related to difficult tasks on the BSS, but compliance is more related to easy tasks on this scale.

The effect of hypnotic training programs on the academic performance of students

The main objective of the present study was to empirically verify the effect of hypnotic training programs on the academic performance of students. A pre and posttest design was used. Two experimental and two control groups (total sample N=119) of volunteer second year psychology students at the University of Stellenbosch in South Africa comprised the sample. One of the experimental groups was exposed to active alert hypnosis and the other to relaxation hypnosis. One control group was exposed to progressive relaxation, while the other did not receive any intervention. The participants' April grades were used as a pretest, while their June grades served as a posttest. The two hypnotic training programs had a significant effect on the academic achievement of the participants, which was not found in the control groups. Regarding the efficacy of the two programs, however, no significant difference was found.

Anatomy of a hypnotic response: Self-report estimates, actual behavior, and physiological response to the hypnotic suggestion for arm rigidity

The present study closely examines subject response to the arm-rigidity item of the HGSHS:A. Subject behavior, subject self-report, and surface EMG of the biceps and triceps muscles were monitored. Two distinct ways of passing the item were observed and verified by EMG recordings: some subjects (tremblers) exerted muscular effort to bend the arm and kept it rigidly straight. Others (nontremblers) passively kept the arm straight without exerting muscular effort to bend, even though they reported exerting effort to bend their arm. These two behaviorally and physiologically different methods of passing the item support the idea of individual differences in hypnotic responding and suggest that subjects may be using different mental processes to pass the item.

Suggestions of altered balance: Possible equivalence of imagery and perception

Hypnotic suggestions describing an altered perception induce congruent changes in the subject's experience and behavior. However, it is not known whether an implicit suggestion, only indirectly referring to an altered perception, induces a behavioral response corresponding to that of the real situation. In this study, an implicit suggestion of backward falling (IMP) was given to high hypnotizable participants not exposed (W-Highs) and exposed (H-Highs) to a hypnotic induction and a group of low hypnotizable individuals (W-Lows). Their posture was evaluated through an elite system. The results after the IMP were compared with those after an explicit suggestion of backward falling (EXP). In both W-Highs and H-Highs, the IMP elicited the backward body sway expected in the corresponding real situation, whereas no response was found in W-Lows. The results are discussed in terms of a possible equivalence of imagery and perception or of a lack of the motor inhibition normally associated with motor imagery.

The neuroscience of observing consciousness & mirror neurons in therapeutic hypnosis

Neuroscience documents the activity of "mirror neurons" in the human brain as a mechanism whereby we experience empathy and recognize the intentions of others by observing their behavior and automatically matching their brain activity. This neural basis of empathy finds support in research on dysfunctions in the mirror systems of humans with autism and fMRI research on normal subjects designed to assess intentionality, emotions, and complex cognition. Such empathy research now appears to be consistent with the historical and research literature on hypnotic induction, rapport, and many of the classical phenomena of suggestion. A preliminary outline of how mirror neurons may function as a rapport zone mediating between observing consciousness, the gene expression/protein synthesis cycle, and brain plasticity in therapeutic hypnosis and psychosomatic medicine is proposed. Brain plasticity is generalized in the theory, research, and practice of utilizing mirror neurons as an explanatory framework in developing and training new skill sets for facilitating an activity-dependent approach to creative problem solving, mind-body healing, and rehabilitation with therapeutic hypnosis.

Hypnosis delivered through immersive virtual reality for burn pain: A clinical case series

This study is the first to use virtual-reality technology on a series of clinical patients to make hypnotic analgesia less effortful for patients and to increase the efficiency of hypnosis by eliminating the need for the presence of a trained clinician. This technologically based hypnotic induction was used to deliver hypnotic analgesia to burn-injury patients undergoing painful wound-care procedures. Pre- and postprocedure measures were collected on 13 patients with burn injuries across 3 days. In an uncontrolled series of cases, there was a decrease in reported pain and anxiety, and the need for opioid medication was cut in half. The results support additional research on the utility and efficacy of hypnotic analgesia provided by virtual reality hypnosis.

Age regression: tailored versus scripted inductions

The effects of tailored versus scripted hypnotic inductions were tested with the intention of shedding light on age regression phenomena. From an initial pool of 31 volunteers, 10 males and 10 females who scored 3 or better on the Stanford Hypnotic Clinical Scale, participated in this study. Participants were assigned to either scripted or tailored hypnotic induction conditions for regression to age 5. The age specific developmental task was to indicate for each of 10 abstract figure pairs, which of each pair "was upside down". Both groups showed significant focal point dependency. However, the tailored induction group showed significantly greater focal point dependency characteristic of 5-year-old children, in contrast to the scripted induction group. It appears that tailored hypnotic inductions may provide a better avenue for the ego to regulate its own degree of regression. The better match to personality style takes advantage of the naturally occurring ego-syntonic capacities of the participant, thereby facilitating greater hypnotic responsiveness.

Whither spontaneous hypnosis: A Critical issue for practitioners and researchers

The critical aspects of recognizing that hypnotic responses are part of everyday life for those who are hypnotizable are considered. The failure of the American Psychological Association (APA) definition to include spontaneous hypnosis is discussed along with the resultant implications for misinforming clinicians, researchers and the public.

Preferences for descriptors of hypnosis: a brief communication

Alternative descriptors of the capacity to experience hypnosis, intended to describe the same phenomenon, appear in the current literature. Published members of the Society for Clinical and Experimental Hypnosis (SCEH) were surveyed to determine their preferences. The descriptors were empirically derived from recent International Journal of Clinical and Experimental Hypnosis articles and input from the executive committee of SCEH. Participants also indicated their primary theoretical conceptualization of hypnosis. Hypnotizability was chosen nearly 4 times more frequently than the next most favored choice (susceptibility) as a descriptor of hypnotic talent. Hypnosis as an "identifiable state" was chosen more than 4 times more frequently than the socio-cognitive version. This latter finding suggests that the notion of the continued debatability of hypnosis as primarily a state is now shared by only a few.

Characterization of N200 and P300: selected studies of the Event-Related Potential

The Event-Related Potential (ERP) is a time-locked measure of electrical activity of the cerebral surface representing a distinct phase of cortical processing. Two components of the ERP which bear special importance to stimulus evaluation, selective attention, and conscious discrimination in humans are the P300 positivity and N200 negativity, appearing 300 ms and 200 ms post-stimulus, respectively. With the rapid proliferation of high-density EEG methods, and interdisciplinary interest in its application as a prognostic, diagnostic, and investigative tool, an understanding of the underpinnings of P300 and N200 physiology may support its application to both the basic neuroscience and clinical medical settings. The authors present a synthesis of current understanding of these two deflections in both normal and pathological states.