The Mechanisms of Cortico-cortical and Cortico-subcortical Networks in Methamphetamine Addiction by Paired Associative Stimulation
试验速览
- 阶段
- 不适用
- 入组人数
- 90
- 试验地点
- 1
- 主要终点
- Change of working memory
研究概览
简要总结
The investigators use paired associative stimulation (PAS) protocols to target cortico-cortical and cortico-subcortical networks to study cognitive deficits in methamphetamine addiction.
详细描述
Paired associative stimulation (PAS) is a form of transcranial magnetic stimulation in which paired pulses can induce plasticity at cortical synapses, producing long-term potentiation (LTP) or long-term depression (LTD) effect. The investigators use paired associative stimulation (PAS) protocols to target cortico-cortical and cortico-subcortical networks (frontoparietal control pathway) by using different intervals between the paired pulses to explore the mechanism of cognitive deficits in methamphetamine addiction. The investigators hypothesize that different temporal sequences of cortical stimulation could produce facilitation or inhibition effect.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Basic Science
- 盲法
- Double (Participant, Investigator)
入排标准
- 年龄范围
- 18 Years 至 45 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •In accordance with the Diagnostic and Statistical Manual of Mental Disorders-5 (DSM-5) for methamphetamine (MA) use disorders
- •Junior high school degree or above
- •Normal vision and hearing
- •Dextromanual
排除标准
- •Have a disease that affect cognitive function such as history of head injury, cerebrovascular disease, epilepsy, etc
- •Have cognitive-promoting drugs in the last 6 months
- •Other substance abuse or dependence in recent five years (except nicotine)
- •Mental impairment, Intelligence Quotient (IQ) < 70
- •Mental disorders
- •Physical disease
结局指标
主要结局
Change of working memory
时间窗: 30 minutes
The N-Back is a working memory task where the subject is presented with a sequence of stimuli (letters). The task consists of indicating when the current stimulus matches the one from n steps earlier in the sequence.
Change of response inhibition
时间窗: 30 minutes
Response inhibition was assessed with the SST (Cambridge Cognition, Cambridge, UK). The subject responded to an arrow (go signal), pointing either right or left, by pressing one of two buttons with the right or left index finger. If an audio tone (stop signal) was present, the subject needed to withhold the response.
Change of attention bias
时间窗: 30 minutes
During the dot-probe task, participants are situated in front of a computer screen with their chin securely placed on a chin rest. Participants are asked to stare at a fixation cross on the center of the screen. Two stimuli, one of which is neutral and one of which is threatening, appear randomly on either side of the screen. The stimuli are presented for a predetermined length of time (most commonly 500ms), before a dot is presented in the location of one former stimulus. Participants are instructed to indicate the location of this dot as quickly as possible, either via keyboard or response box.
Change of risk decision
时间窗: 30 minutes
The Balloon Analogue Risk Task (BART) is a computerized measure of risk taking behavior. In the task, the participant is presented with a balloon and offered the chance to earn money by pumping the balloon up by clicking a button. Each click causes the balloon to incrementally inflate and money to be added to a counter up until some threshold, at which point the balloon is over inflated and explodes.
次要结局
- Change of resting motor threshold(30 minutes)
- Change of eeg oscillatory (Alpha, Beta, Theta and Delta)(30 minutes)
- Change of eeg functional connectivity (Alpha, Beta, Theta and Delta)(30 minutes)
- Change of motor evoked potential(30 minutes)
研究者
Haifeng Jiang
associate chief physician
Shanghai Mental Health Center