Alteration of hypnotic experience following transcranial electrical stimulation of the left prefrontal cortex

• Rinaldo Livio Perri ^[1] ; Gloria Di Filippo ^[2]
  1. [1] University Niccolò Cusano

     University Niccolò Cusano

     Roma Capitale, Italia

     
  2. [2] De Sanctis Clinical Center (CCDS), Roma
• Localización: International journal of clinical and health psychology, ISSN 1697-2600, Vol. 23, Nº. 2, 2023, págs. 11-20
• Idioma: inglés
• DOI: 10.1016/j.ijchp.2022.100346
• Enlaces
  • Texto completo
• Resumen

  • Background Recent studies of neurostimulation reported alteration of hypnotizability and hypnotic phenomena after inhibition of the dorsolateral prefrontal cortex (DLPFC), but the different assessments of hypnosis and the stimulation parameters still left open many questions about the role of this brain region in hypnotizability. We aimed to administer inhibitory transcranial direct current stimulation (tDCS) over the left DLPFC to observe effects of stimulation on the hypnotic experience and the feeling of agency.

    Methods a procedure of hypnotic induction with suggestions was repeated twice: before and after the unilateral cathodal tDCS over the left DLPFC. The experience was assessed through a phenomenological assessment of hypnosis and sense of agency in thirty-three participants randomly assigned to the sham or the active group.

    Results active (inhibitory) tDCS enhanced the hypnotizability by 15.4% and altered a few dimensions of consciousness such as self-awareness and absorption. No changes emerged on the feeling of agency and pass rates for suggestions.

    Conclusions tDCS reflects a promising tool to alter the hypnotic phenomena and the responsiveness to hypnotic procedures. Neurocognitive implications are discussed for the construct of hypnotizability as well as for the role of the left DLPFC in the dimensions of consciousness such as self-awareness.

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