Brain Signal Training to Enhance Affect Down-regulation

Borderline Personality Disorder (BPD) is characterized by self-mutilation, suicidality, and severe interpersonal disturbances. These symptoms reflect pervasive emotion regulation problems. On the neural level, BPD patients show an inflated amygdala response to emotional cues. In addition, they have reduced neural control of the amygdala. The amygdala controls emotional experience and behavior. Therefore, current psychobiological theories consider amygdala hyper-activity a causal mechanism for emotional overreaction in BPD.

Functional magnetic resonance imaging (fMRI) allows the recording of activation in subcortical brain regions, such as the amygdala, in real time. Live feedback from brain activation (e.g. via a thermometer with the temperature reflecting the degree of activation) allows one to learn the voluntary control of the brain. Dubbed "neurofeedback" (NF), the method can result in long-lasting changes in neural activation patterns. NF allows precise targeting of dysfunctional neuro-circuitries that relate to clinical symptoms.

The project proposed here investigates the clinical effectivity of fMRI-based amygdala-NF training in BPD. In total, 164 patients will participate in four training sessions provided by four study centers: Tuebingen, Freiburg, Giessen, and Mannheim. The training aims to reduce affective instability in everyday life, which is assessed primarily by ambulatory assessment before and after treatment. During NF sessions, patients receive feedback from the BOLD (Blood Oxygenation Level Dependent) signal recorded in the amygdala while they view pictures with negative emotional content. The amygdala responds to these pictures with an activation increase. The patient observes the amygdala responding, illustrated via increased temperature in a thermometer beside the picture. The task is to decrease temperature. The procedure should teach patients to master overreaction at an early stage of neural emotion processing.

To assess the effectivity of amygdala-NF, a control group receives non-veridical feedback from a different patient. The investigators expect a significant reduction in affective instability with amygdala-NF. In addition, the investigators expect a greater reduction in affective instability in the amygdala-NF group versus the control group.

The trial will go through two stages of recruitment. Stage 1 is reached after recruitment of 82 participants. An interim analysis will be conducted. Depending on the results of the interim analysis, the trial will enter stage 2, ie. recruitment of the full number of planned participants.

Results from this study enable assessment of clinical efficacy of amygdala-NF. In the future, NF could serve as a precise tool for person-centered treatment of affective instability symptoms in mental disorders with severe emotion regulation problems such as BPD.

Stage 1: 82 patients, stage 2: 82 patients Inclusion Criteria

• 18-65 years
• Diagnosis of Borderline Personality Disorder
• Insufficient response to ≥2 therapies.
• Sufficient German language skills to give informed consent to the study, to understand questions posed by used instruments, and capable of completing the fMRI tasks
• Ability of subject to understand character and individual consequences of clinical investigation
• Written informed consent (must be available before enrollment in the clinical investigation)
• For women of childbearing potential (WOCBP) adequate contraception.

Exclusion criteria

• Treatment with benzodiazepines within 7 days prior the initial screening
• Current alcohol or substance dependence
• Meeting the diagnostic criteria for a psychotic disorder or schizophrenia (life-time), as determined by clinical interview at initial screening
• Current or history of significant neurological condition (such as stroke, traumatic brain injury, space occupying lesions, multiple sclerosis, Parkinson's disease, vascular dementia, transient ischemic attack)
• Significant visual impairment that might interfere with the performance of the behavioural tasks or fMRI tasks
• Change of treatment (psychopharmacologic, psychological) 2 weeks prior to or during the study participation
• Treatment with any neurofeedback three months prior to or during the study participation.
• Unable or unwilling to comply with study procedures, including study prohibitions and restrictions
• History of claustrophobia or inability to tolerate scanner environment
• Fulfilling any of the MRI contraindications on the standard site radiography screening questionnaire (e.g. history of surgery involving metal implants)
• Clinically relevant structural brain abnormality as determined by prior MRI scan
• Planned medical treatment within the study period that might interfere with the study procedures
• Participants deemed to be at significant risk of serious violence or suicide
• BMI of 16.5 or lower
• Participation in other clinical trials or observation period of competing trials, respectively
• Previous participation in this trial
• Pregnancy and lactation
• Held in an institution by legal or official order
• Legally incapacitated.