Neural Basis of Human Working Memory

Part of paid clinical trials in Nashville, Tennessee.

Sponsor
Vanderbilt University Medical Center
Study ID
NCT07617506
Status
Recruiting
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Conditions

  • Memory Disorders

Eligibility Criteria

Sex
ALL
Age
18 Years - N/A
Healthy Volunteers
Not accepted

Interventions

  • Neurocognitive Tasks — BEHAVIORAL
    Participants complete computerized neurocognitive tasks assessing working memory, response inhibition, decision-making, reward processing, and other related cognitive functions during sEEG monitoring. Tasks may include the stop signal reaction time task, the n-back working memory task, the delayed response task, the match/nonmatch task, the gambling task, the card guessing task, and the emotional stop signal reaction time task. Intracranial neural activity is recorded during task performance, and select tasks may include research electrical stimulation delivered through the implanted sEEG electrodes.
  • Ripple Neuromed Summit System — DEVICE
    Neurophysiology system designed to allow recording of neural signals as well as delivery of neural stimulation. The system is a portable unit which is connected to cables connected to the clinical electrodes. Neurophysiology signals from the electrodes can be recorded, amplified, and processed by the unit. The unit also has the ability to deliver electrical stimulation through the electrodes according to programmed parameters.

Study Details

This ClinicalTrials.gov entry corresponds to the Neural Basis of Human Working Memory protocol approved under Vanderbilt University Medical Center IRB #251231. This study investigates the neural activity underlying human working memory, via local field potential changes (macro level) and/or single neuronal spiking changes (micro level) from depth electrodes placed for invasive seizure monitoring. Subjects will complete neurocognitive tasks while neural recordings are collected. Some patients will complete neurocognitive tasks while stimulation is applied via depth electrodes. Further understanding the neural activity changes underlying normal and impaired working memory may help to identify novel diagnostic methods and treatments for impaired working memory and may support the use of stimulation for treatment of memory disorders.

Key Dates

First listed
Jun 1, 2026
Start date
Jun 4, 2025
Status verified
Jun 2026
Primary completion
Apr 30, 2027
Completion
Apr 30, 2027

Study Design

Enrollment
100 participants (estimated)
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE

Arms

  • Other: Epilepsy patients
    All participants will be patients with medically refractory epilepsy who have undergone depth electrode placement for stereo EEG monitoring for seizure localization. Participants will complete working memory tasks and EEG recordings will be concurrently collected from their depth electrodes. Some subjects will undergo macro-micro electrode implantation as a part of their SEEG implantation procedure for the purpose of EEG macro (local activity) and micro (single-unit) recordings. Some subjects will complete working memory tasks with stimulation applied during task completion.

Primary Outcome Measure

Local field potential changes in response to working memory tasks [ Time Frame: During patient's epilepsy monitoring stay, approximately 20-30 minutes ]

Central Contacts

Locations (1)

FacilityCityStateZIPSite coordinators
Vanderbilt University Medical CenterNashvilleTennessee37232
Lucas Chang, BA
[email protected]
615-421-3046
Christos Constantinidis, PhD
[email protected]
(615) 936 - 2020

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