Does hypnotizability affect neurovascular coupling during cognitive tasks?

• Published in: Physiology & behavior 2022-12, Vol.257, p.113915-113915, Article 113915
• Main Authors: Rashid, Anas, Santarcangelo, Enrica Laura, Roatta, Silvestro
• Format: Article
• Language: English
• Subjects: Cognitive tasks; Hypnotizability; Mental computation; NIRS; Trail making task
• ISSN: 0031-9384; 1873-507X
• DOI: 10.1016/j.physbeh.2022.113915

•Scales identify low-to-medium (LM) and medium-to-high (MH) hypnotizable subjects.•Cerebral oxygenation (TOI) was measured during cognitive tasks in LM and MH.•TOI time course during mental computation was different in LM and MH.•Only MH showed different increases in TOI during different cognitive tasks.•Hypnotizability affects the magnitude and time course of functional hyperemia. Susceptibility to hypnosis is a very pervasive psychophysiological trait characterized by different attentional abilities, information processing, and cardiovascular control. Since near infrared spectroscopy is a good index of neurovascular coupling, we used it during mental computation (MC) and trail making task (TMT) in 13 healthy low-to-medium (med-lows) and 10 healthy medium-to-high (med-highs) hypnotizable participants classified according to the Stanford Hypnotic Susceptibility Scale, form A, and characterized for the level of proneness to be deeply absorbed in related experiences by the Tellegen Absorption Scale. The med-highs reported greater absorption than med-lows. The tissue hemoglobin index (THI) and the tissue oxygenation index (TOI) increased across the tasks only in med-highs who displayed also different time courses of THI and TOI during MC and TMT, which indicates different tasks processing despite the two groups’ similar performance. The findings suggest that med-highs’ tissue oxygenation is more finely adjusted to metabolic demands than med-lows’.