CClinicalTrials.gg
CompletedNCT02781129Updated Jul 30, 2025

Navigation and Free Recall in Chronically Implanted Humans

An interventional study of electrical stimulation in Epilepsy, sponsored by Barbara Jobst. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-07-30.

Sponsored by Barbara Jobst · Not applicable, Interventional, and Other

Phase
Not applicable
Study type
Interventional
Enrollment
9
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

This study is designed to identify brain activity associated with good memory in subjects with a chronically implanted RNS® device and to study the effects of therapeutic stimulation for epilepsy on memory. This will be accomplished through analysis of ECoG data collected during memory encoding for short and long-term free recall as well as during navigation tasks.

02

Conditions studied

  • Epilepsy

Browse trials for

Keywords

  • Memory
  • Responsive Neurostimulator System
03

In context

Epilepsy

1,805 studies on the registry are indexed under Epilepsy; 417 are open to participants now.

This study's enrollment of 9 is below the median of 50 across 1,206 interventional studies indexed under Epilepsy.

Browse Epilepsy studies →

Lead sponsor

This is the only study on the registry with Barbara Jobst as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • able to give informed consent
  • 18 years of age or older
  • Diagnosis of epilepsy
  • Implanted RNS® device and receiving therapeutic stimulation for epilepsy.
  • Capable of completing experimental tasks in the judgment of the Principal Investigator

Exclusion criteria

Exclusion Criteria:

  • RNS® Neurostimulator implanted within 3 months of experimental tasks.
05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
9 participants (actual)

Study arms

  • Experimental
    RNS® Neurostimulator

    Subjects with pharmaceutically intractable seizures who have been implanted with a RNS® Neurostimulator.

    Other: electrical stimulation

Interventions

  • Otherelectrical stimulation

    Stimulation applied will be within parameters commonly used for the treatment of epilepsy during periods of encoding, recall, and memory maintenance .

06

What researchers measure

Primary outcomes

  1. Proportion of words recalled with and without stimulation.

    This study is designed to study the effects of therapeutic stimulation for epilepsy on memory. This outcome will be assessed by free recall language and memory tasks.

    Time frame: 30 days

Secondary outcomes

  1. Changes in the power spectrum of ECoG data with an increase of recalled words.

    This study is designed to identify brain activity associated with good memory in subjects with a chronically implanted RNS® device. This outcome will be assessed by free recall language and memory tasks.

    Time frame: 30 days

  2. Proportion of words recalled during times of interictal activity.

    This study is designed to investigate the effects of IEDs on spatial, long-term, and short-term memory. This will be assessed by free recall language and memory tasks.

    Time frame: 30 days

  3. Proportion of navigation challenges recalled successfully with and without stimulation.

    This outcome will be assessed by real-world and virtual navigation tasks.

    Time frame: 30 days

07

Study locations

1 site
  • Dartmouth-Hitchcock Medical Center in Lebanon, NH
    Lebanon, New Hampshire 03766, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 30, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02781129
Lead sponsor
Barbara Jobst
Collaborators
NeuroPace
Responsible party
Barbara Jobst (Dr., Dartmouth-Hitchcock Medical Center) — Sponsor-investigator
First posted
May 24, 2016
Start date
May 2016
Primary completion
May 2025
Completion
May 2025
Last update
Jul 30, 2025

Study contacts

Barbara C Jobst, MD
principal investigator · Dartmouth-Hitchcock Medical Center

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jul 2025. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion