Beyond the Self and Back: Neuropharmacological Mechanisms Underlying the Dissolution of the Self
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 140
- 主要终点
- fMRI resting state activity (BOLD signal)
研究概览
简要总结
The aim of the study is to identify neural signatures, behavioral and phenomenological expressions of self-related processes including: sense of agency, semantic distinction between self and other, selflessness (altruism), social agency, embodied self (interoception), perceptual functioning of dissolved self including hallucinations and crossmodal processing, and finally the mystical type dissolution of the self.
详细描述
Four placebo-controlled, double blind sets of procedures using psilocybin with four independent study groups will be conducted. The number of subjects, testing procedures and dose of psilocybin for each group are as follows: group 1 (20 subjects, EEG, questionnaires, 0.200 mg/Kg body weight), group 2 (30 subjects, functional magnetic resonance imaging (fMRI), questionnaires, 0.200 mg/Kg body weight), group 3 (10 subjects, fMRI, questionnaires, 0.215 mg/Kg body weight), study group 4 (80 subjects, blood serum and saliva parameters, questionnaires, fMRI (only in 20 subjects from this group), 0.315 mg/Kg body weight). The groups 1, 2 and 3 involve healthy volunteers. The group 4 involves healthy volunteer long-term and short-term meditators during a 5-day group meditation retreat. Together, 140 subjects will participate in the study.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- Double (Participant, Investigator)
入排标准
- 年龄范围
- 20 Years 至 60 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Healthy male and female volunteers at the age of 20-40 y (Group 1, 2 and 3) and 20-60 y (Group 4)
- •Willing and capable to give informed consent for the participation in the study after it has been thoroughly explained
- •Willing to refrain from drinking alcohol the day before testing session, from drinking alcohol and caffeinated drinks at the testing days and from consuming psychoactive substances 2 weeks before testing days and for the duration of the study.
- •Able and willing to comply with all study requirements
- •Informed consent form was signed
- •Further inclusion criteria for the Study Group 4:
- •over 5000 hours of meditation experience (40 participants)
- •meditation naive (with no experience in meditation) or with a low experience in meditation (as a criterium the total amount of less than <100 hours of meditation experience will be used) (40 participants)
排除标准
- •Poor knowledge of the German language
- •Previous significant adverse response to a hallucinogenic drug
- •Participation in another study where pharmaceutical compounds will be given
- •Self or first-degree relatives with present or antecedent psychiatric disorders
- •History of head trauma or fainting
- •Recent cardiac or brain surgery
- •Current use of medication known to affect brain function (e.g. benzodiazepines, antihistamines, aspirin, beta blockers, theophylline, azetazolamide, etc.)
- •Concomitant therapy with potent inhibitors of cytochrome P-450 isoenzyme 3A4 (HIV protease inhibitors, macrolide antibiotics, azolederivative anti-infective agents)
- •Presence of major internal or neurological disorders (including sepsis, pheochromocytoma, thyrotoxicosis, drug-induced fibrosis, familiar or basilar artery migraine)
- •Cardiovascular disease (hypertonia, coronary artery disease, heart insufficiency, myocardial infarction within the past 6 months, coronary spastic angina)
- •Peripheral vascular disease (thromboangiitis obliterans, luetic arteritis, severe arteriosclerosis, thrombophlebitis, Raynaud's disease)
- •Liver or renal disease
- •Pregnant or breastfeeding women (a urine pregnancy test will be done for all women capable of bearing children)
- •Women of childbearing potential who are not using effective, established contraception, such as oral, injected or implanted hormonal methods of contraception, placement of an intrauterine device (IUD) or intrauterine system (IUS), barrier methods of contraception: condom or occlusive cap (diaphragm or cervical/vault caps) with spermicidal foam/gel/film/cream/suppository
- •Further exclusion criteria for the Study Group 2, 3 and 4:
- •Inability to lie still for about 60 minutes (e.g. because of sneezing, itching, tremor, pain)
- •Metal parts in the body (piercings, brain aneurysm clip, implanted neural stimulator/cardiac pacemaker/defibrillator/Swan Ganz catheter/insulin pump, cochlear implant); metal shrapnel or bullet, ocular foreign body (e.g. metal shavings); current or previous job in metalworking industry
- •Claustrophobia
- •The presence of any one of the above mentioned exclusion criteria will lead to exclusion of the subject.
研究组 & 干预措施
Psilocybin Group 1
Group 1: randomized, placebo-controlled, double-blind, cross-over design
干预措施: Placebo (Drug)
Psilocybin Group 1
Group 1: randomized, placebo-controlled, double-blind, cross-over design
干预措施: Psilocybine (Drug)
Psilocybin Group 2
Group 2: randomized, placebo-controlled, double-blind, cross-over design
干预措施: Placebo (Drug)
Psilocybin Group 2
Group 2: randomized, placebo-controlled, double-blind, cross-over design
干预措施: Psilocybine (Drug)
Psilocybin Group 3
Group 3: randomized, placebo-controlled, double-blind, cross-over design
干预措施: Placebo (Drug)
Psilocybin Group 3
Group 3: randomized, placebo-controlled, double-blind, cross-over design
干预措施: Psilocybine (Drug)
Psilocybin Group 4
Group 4: randomized, placebo-controlled, double-blind, matched group design
干预措施: Placebo (Drug)
Psilocybin Group 4
Group 4: randomized, placebo-controlled, double-blind, matched group design
干预措施: Psilocybine (Drug)
结局指标
主要结局
fMRI resting state activity (BOLD signal)
时间窗: 60 minutes
EEG measurement (ERPs)
时间窗: 60 minutes
次要结局
- Subjective effects will be assessed with the 5-Dimensional Altered States of Consciousness Rating Scale (5D-ASC)(7 hours)
- Mood changes will be assessed with the Positive and Negative Affect Schedule (PANAS)(7 hours)