Идёт набор NCT07367672

The Power of Belief: Expectation-driven and Placebo Modulation of Empathic Pain

Без фазы С лечением Healthy Participants

Ориентир для пациента и семьи

Простыми словами

Автоматическая сводка по структурированным данным реестра. Она помогает сориентироваться, но не заменяет официальный протокол или оценку врача.

Что изучают: В протоколе указаны: Intranasal Oxytocin (OT) 24 IU, Intranasal placebo administration.
Кому может быть актуально: Состояния в реестре: Healthy Participants. Базовые параметры: 18 лет — 30 лет · Все.
Что важно проверить: Возраст, диагноз и пол — только базовые ориентиры. Предыдущее лечение, анализы и другие обязательные условия указаны ниже в критериях участия.
Где проводится: Китай
Следующий шаг: Сохраните исследование, покажите его лечащему врачу и уточните актуальный статус у исследовательского центра. Расходы, документы и поездка →

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Обзор

This study investigates how belief and expectation influence empathic pain-the pain we feel when observing others in distress. Healthy adult participants will be randomly assigned to one of three groups: no-treatment control, placebo nasal spray, oxytocin-containing nasal spray. Participants in both the placebo and oxytocin conditions will be informed that they are receiving oxytocin, described as a potent agent for pain relief. During functional MRI scanning, all participants will view naturalistic pain-related videos and provide ratings of perceived subjective pain. The study aims to examine how cognitive beliefs and neuromodulatory interventions alter subjective pain experience and brain activity, including changes in brain network communication.

Подробное описание

This study examines how belief-driven expectations modulate empathic pain at both behavioral and neural levels. Healthy adult participants will be randomly assigned to one of three groups: no-treatment control, placebo nasal spray, oxytocin-containing nasal spray. Participants in both the placebo and oxytocin conditions will be informed that they are receiving oxytocin, described as a potent agent for pain relief.

During fMRI scanning, participants will complete a naturalistic empathic pain task by viewing videos depicting others in pain and rating their perceived pain on a standardized scale. Behavioral data will be transformed into analgesia-weighted scores to capture individual sensitivity to expectation-driven analgesia. Neural data will include whole-brain voxel-wise activity, multivariate predictive patterns derived from partial least squares regression (PLSR), and directed functional connectivity assessed using lagged partial-correlation directionality analysis (LPC-DA) to evaluate top-down and bottom-up information flow.

The primary objectives are to (1) assess the behavioral effects of expectation-driven analgesia, (2) identify brain regions predictive of pain modulation, and (3) characterize hierarchical network reorganization under different interventions.

Вмешательства

Препарат Intranasal Oxytocin (OT) 24 IU
Administer oxytocin (24 IU) intranasally, 6 individual 0.1 ml puffs (4 IU/0. 1ml), three puffs per nostril one every 30 seconds. The participants will be informed that they are receiving oxytocin, described as a potent agent for pain relief.
Препарат Intranasal placebo administration
Administer placebo intranasally, 6 individual 0.1 ml puffs, three puffs per nostril one every 30 seconds. The participants will be informed that they are receiving oxytocin, described as a potent agent for pain relief.

Первичные конечные точки

Analgesia-weighted empathic pain ratings (R') [Срок оценки: During fMRI scanning (45 minutes follollowing treament adminstration), for each video stimulus presentation]
Whole-brain multivariate predictive patterns [Срок оценки: During fMRI scanning (45 minutes follollowing treament adminstration), analyzed post-session]
Directed functional connectivity and network hierarchy [Срок оценки: During fMRI scanning (45 minutes follollowing treament adminstration), analyzed post-session]

Критерии участия

Критерии включения

(1) Healthy subjects without any past or present psychiatric or neurological disorders; (2) Healthy subjects without any current psychotherapeutic medication.