Modifying Working Memory With Brain Stimulation

Cognitive Impairment Clinical Trial

— BROCA-NIBS  

Official title:

Brain Outcome After Cardiac Arrest. Modifying Working Memory With Non-invasive Brain Stimulation - A Series of SCEDs

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT06119620
• Other study ID #: BROCA-NIBS
• Status: Recruiting
• Phase: N/A
• Start date: November 1, 2023
• Est. completion date: October 1, 2024

Study information

• Verified date: November 2023
• Source: Maastricht University
• Contact: Pauline V van Gils, MSc
• Phone: +31 (0)43 38 84095
• Email: c.vangils[@]maastrichtuniversity.nl
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The investigators want to investigate the effect of rTMS on working memory measured by the N-back task. This is a single case experimental design, ABAB.

Description:

Rationale: The survival rate of patients after cardiac arrest and resuscitation has increased considerably. A common consequence of cardiac arrest is ischemic-hypoxic brain damage leading to cognitive impairment. Currently, there is a lack of knowledge regarding effectiveness of treatments to improve outcomes of patients with cognitive impairment after a cardiac arrest.

Objective: The primary objective is to investigate the effects of rTMS (iTBS protocol) on working memory of people with memory impairments after a cardiac arrest in the past Study design: This will be a single blinded replicated randomized SCED withdrawal designs study.

Study population: Nine adults who had a cardiac arrest in the past will be participating in this study. They are recruited in the general population.

Intervention: If participants are suitable based on the screening. Participants are invited to the university of Maastricht. There they receive intermitted theta burst stimulation with a TMS coil for 3 minutes on the dorsolateral prefrontal cortex. Then they perform the N-back task for 8 to 12 minutes to estimate working-memory performance. Then they have a break (45 min). Then they receive 3 minutes of sham stimulation after which they have to perform the N-back task again for 8 - 12 minutes. This will be repeated (active stimulation - sham - active stimulation - sham).

Main study parameter: The main study outcomes are performance on the N-back task with regard to accuracy.

Nature and extent of the burden and risks associated with participation, benefit and group relatedness: The participant has to come to the university twice. The screening session takes approximately 1-1,5 hour, the experimental session 3,5 hours. The participant could experience side effects of the rTMS, these include: headache, scalp discomfort, tingling or twitching of the facial muscles, and light-headedness. Serious side effects are very rare, but they may include: seizures. The N-back task can be experienced as tiring.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 9
• Est. completion date: October 1, 2024
• Est. primary completion date: August 1, 2024
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 75 Years

Eligibility

Inclusion Criteria:

• Had a cardiac arrest between 3 months and 5 years prior to the experiment session.

• Scores lower than the general population (corrected for age, education, and sex) on at least one of the cognitive tests ( SD < -1 on the Stroop, digit span, or TMT).

• Age 18 up to and including 75.

• Proficient in Dutch or English to understand the instructions for the N-back task.

• Has sufficient understanding to perform the N-back task.

• Written informed consent

Exclusion Criteria:

• Has a pacemaker or ICD (implantable cardioverter-defibrillator)

• A history or a family member with a history of seizures / epilepsy (asked on the phone and checked on the first appointment).

• Metal implants in or near the head.

• Pregnancy

• Any other neurological disorder impending working memory performance besides the OHCA.

Related Conditions & MeSH terms

• Cardiac Arrest
• Cognitive Impairment
• Heart Arrest

Intervention

Device:
• intermitted theta burst stimulation
Participants receive intermitted theta burst stimulation for 3-4 minutes before completing the N-back task.

Locations

Country	Name	City	State
Netherlands	Maastricht University	Maastricht	Limburg

Sponsors (1)

Lead Sponsor	Collaborator
Maastricht University

Country where clinical trial is conducted

Netherlands, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Accuracy on the N-back task	Percentage of correct responses for every 2 N-back blocks	1 measurements every 2 minutes for 8 - 10 minutes after each N-back task (4 times in total)
Secondary	RT on the N-back task	reaction time on the N-back task	1 measurements every 2 minutes for 8 - 10 minutes after each N-back task (4 times in total)
Secondary	d' on the N-back task	d' = z(False alarms) - z(Hits)	1 measurements every 2 minutes for 8 - 10 minutes after each N-back task (4 times in total)