Amphetamine Use Disorders
Conditions
Keywords
individualized therapy, closed-loop, Amphetamine-type stimulants, cTBS
Brief summary
Using specific EEG biomarkers in methamphetamine-dependent individuals, this study systematically probes closed-loop continuous Theta-burst Stimulation (cTBS) based on brain states, assessing dosage, neurologic and behavioral effects, while comparing its efficacy with traditional open-loop cTBS methods.
Detailed description
The current study delineates a robust correlation between prefrontal cortex EEG signals and the psychological craving associated with methamphetamine usage. Dependents exhibit heightened β oscillation energy in the MPFC region and diminished γ oscillation energy across the DLPFC-MPFC region. Previously, through the implementation of rTMS interventions on the left DLPFC, the investigators have successfully reduced the craving levels in users when exposed to relevant cues, coupled with observed decreases in β oscillation energy and increases in γ oscillation energy in the MPFC region. This indicates that both β and γ oscillation energies are instrumental in representing the involvement of MPFC and DLPFC during craving episodes, and neuromodulatory technologies can modulate these energy levels, consequently reducing cravings. Furthermore, the investigators identified a significant augmentation in the theta energy in the occipital lobe when MA dependents are confronted with drug-related cue imagery, signifying a potential crucial neural marker for addiction-induced brain activity. Therefore, the investigators intend to employ the non-invasive continuous Theta-burst Stimulation (cTBS) , predicated upon biomarkers of addiction states, to administer specific frequency stimulations to targeted brain regions, aiming to achieve therapeutic objectives in addiction treatment.
Interventions
DEVICEClosed-loop cTBS stimulation based on addiction induced states
We conducted a longitudinal controlled study of closed-loop cTBS interventions among MA dependents.This involved implementing interventions based on addiction-induced states through closed loop cTBS stimulation, randomized time-point stimulation, and traditional continuous stimulation.
Sponsors
Shanghai Mental Health Center
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
No
Inclusion criteria
* Individuals aged between 18 and 60 years, irrespective of gender, having completed a minimum of 9 years of education and capable of effectively cooperating in questionnaire evaluations. * Meet the diagnostic criteria set forth by the DSM-V concerning the amphetamine-type substance addiction. * A history of utilizing amphetamine-type substances for a duration not less than one year, with a frequency of use being at least once per week. * Consent to actively cooperate in the completion of subsequent follow-up assessments.
Exclusion criteria
* Severe cognitive functional impairments manifested through a history of head trauma, cerebrovascular diseases, epilepsy, etc., or usage of cognitive enhancement drugs in the past 6 months; an intellectual disability with an IQ score less than 70. * A diagnosis of schizophrenia or other severe mental illnesses as per the DSM-5 criteria. * Abuse or dependence on other psychoactive substances (excluding nicotine) within the past 5 years. * Severe organic diseases that might compromise study participation. * Contraindications to cTBS, such as a history of epileptic seizures or the presence of metallic implants in proximity to the head.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change of Craving assessed by Visual Analog Scale (VAS) | through study completion, an average of 1 month | The intensity of psychological craving in MA dependents was assessed using the Visual Analogue Scale (VAS), where individuals rated their cravings on a scale from 0 to 10, with higher scores indicating greater levels of craving. The VAS scores were utilized based on two conditions: during a resting state and when subjected to cue induction involving images associated with methamphetamine, serving as the criteria for evaluation. individuals rated their cravings on a scale from 0 to 10, with higher scores indicating greater levels of craving. The VAS scores were utilized based on two conditions: during a resting state and when subjected to cue induction involving images associated with methamphetamine, serving as the criteria for evaluation. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Changes of electroencephalogram power spectrum | through study completion, an average of 1 month | Resting-state EEG can be used to extract power spectra and electrode functional connectivity; on-task EEG can be used to isolate time-frequency features during non-stimulated trials to extract alpha, beta, theta, and gamma band energy of the parietal and occipital electrodes. Both can be used to assess changes in neural activity before, during, and after their restimulation. |
| Probabilistic inversion learning task | through study completion, an average of 1 month | The matching of symbols and colours was reversed without informing the subjects and their cognitive flexibility in the reversed condition was assessed |
| Anxiety | through study completion, an average of 1 month | The reduction rate in the Beck Anxiety Inventory (BAI) scores was calculated before and after intervention to assess the rate of decrease in anxiety levels among MA dependents. |
| Depression | through study completion, an average of 1 month | The reduction rate in the Beck Depression Inventory (BDI) scores was calculated before and after the intervention to evaluate the rate of reduction in their levels of depression. |
| sleep quality | through study completion, an average of 1 month | Improvement in subjects' sleep before and after the intervention as assessed by the Pittsburgh Sleep Quality Index scale (PSQI) |
Countries
China
Contacts
Primary ContactMin Zhao, PhD
Backup ContactHang Su, PhD
Outcome results
None listed