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Spatial NavigationNCT05801861

Modulating Goal-directed Navigation Using Noninvasive Brain Stimulation

A study testing Active 10-Hz TMS to the parietal cortex and Active single pulse TMS to the parietal cortex in people with Spatial Navigation, run by Rutgers, The State University of New Jersey at 1 site in United States.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

Our specific aim is to examine the effects of TMS on spatial processing during goal-directed navigation. In these experiments the investigators will utilize a scalp-recorded brain oscillation called right posterior theta that is believed to index the sensitivity of the parahippocampal cortex to spatial context. Read more about this study

Who is it for?
Ages 18 to 55 yearsHealthy volunteers can take part
Conditions the study is for
Spatial Navigation
What is being tested?
Active 10-Hz TMS to the parietal cortex and Active single pulse TMS to the parietal cortex
Type of treatment
Medical device
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
60 participants
Where
1 siteUnited States
Study dates
24 Mar 2023to 31 Aug 2026
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 55 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Be between the ages of 18 and 55 years old.
  • Not received substance abuse treatment within the previous 30 days.
  • Be in stable mental and physical health.
  • If female, test non-pregnant.
  • No evidence of focal or diffuse brain lesion on MRI.
  • Be willing to provide informed consent.
  • Be able to comply with protocol requirements and likely to complete all study procedures.

Who cannot join

  • Contraindication to MRI (e.g., presence of metal in the skull, orbits or intracranial cavity, claustrophobia).
  • Contraindication to rTMS (history of neurological disorder or seizure, increased intracranial pressure, brain surgery, or head trauma with loss of consciousness for > 15 minutes, implanted electronic device, metal in the head, or pregnancy).
  • History of autoimmune, endocrine, viral, or vascular disorder affecting the brain.
  • History or MRI evidence of neurological disorder that would lead to local or diffuse brain lesions or significant physical impairment.
  • Life time history of mental disorders such as: Bipolar Affective disorder (BPAD), Schizophrenia, Post-traumatic Stress disorder (PTSD) or Dementia or Major Depression.
  • uninterruptable central nervous system medication.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

United States1 site, 1 recruiting
  • Rutgers University - Newark

    Newark, New Jersey, 07102

    Travis E Baker, PhD, 973-353-5485, travis.e.baker@rutgers.edu

    Malte Gueth, 973-353-3509, mrg217@newark.rutgers.edu

    Recruiting

Other trials in United States

About this study

Official title: Modulating Spatial Processing During Goal-directed Navigation Using Transcranial Magnetic Stimulation

Our specific aim is to examine the effects of TMS on spatial processing during goal-directed navigation. In these experiments the investigators will utilize a scalp-recorded brain oscillation called right posterior theta that is believed to index the sensitivity of the parahippocampal cortex to spatial context. Here the investigators will asked whether this electrophysiological signal can be modulated up or down using TMS while participants engage in virtual navigation tasks, and if so, whether it would affect the spatial encoding of rewards and subsequent choices during task performance.

Read the detailed description

The design is primarily a randomized control-trial design (3 sessions), testing the effects of 10-Hz rTMS and single-pulse TMS on spatial processing during goal-directed navigation tasks. Subjects will be randomly assigned to an active or sham group. All participants will be asked to complete two TMS sessions within two weeks. For the active TMS group, participants will be scanned using a 3 Tesla MRI system and will receive a structural (T1) and diffusion-weighted imaging (DWI) scan (Session A). For each subsequent TMS session, the TMS coil will be placed 1cm above the scalp over a right parietal region displaying maximum connectivity patterns with the parahippocampal cortex. Subjects will be randomly assigned to a 10-Hz rTMS protocol or single-pulse TMS protocol. At the start of the first TMS session (Session B), participants will be fitted with an EEG cap and engage in a virtual T-maze reward task. In this task, subjects will be asked to choose the left or right alley of the maze, and after their response, they will received a reward stimulus (apple or orange) which will indicate whether the participant will receive 5 or 0 cents on that trial. For the 10-Hz group, the task will be divided into 2 blocks (225 trials per block). At the start of Block 1, the robotic arm will position the TMS coil <1 cm over the right parietal target. Next, 50 rTMS pulses will be delivered at 110% of participants' rMT at 10-Hz continuously over the target immediately before every 10 trials of the T-maze. A total of 2250 pulses will be delivered and 450 T-maze trials completed. For the single-pulse group, the T-maze task will be divided into 2 blocks (225 trials per block). For the first block, a single TMS pulse will be delivered at 110% of participants' rMT over the TMS target immediately following trial-to-trial feedback and at the peak phase of the evoked theta oscillations (closed-loop). Following 10 trials of single-pulse, subjects will complete 5 trials with no TMS (total 150 TMS trials, 75 no-TMS trials). For the second block, a single TMS pulse will be delivered over the TMS target immediately following trial-to-trial feedback and at the trough phase of the evoked theta oscillation (peak and trough order will be counterbalanced across subjects). Following 10 trials of single-pulse, subjects will complete 5 trials with no TMS (total 150 TMS trials, 75 no-TMS trials). A total of 300 TMS trials and 150 no-TMS trials of the T-maze task will be performed. At the end of Session B, participants will be scheduled to return to the laboratory to complete Session C on a separate day. At the start of the second TMS session (Session C), participants will be fitted with an EEG cap and engage in the Linear Track Maze. During the encoding phase of this task, subjects will be presented with five distinct landmarks (pillars) along the track. Each time they reach a landmark, they stop for 500 ms and an apple (a reward, 5 cents) or an orange (no reward, 0 cents) appears. Only one landmark is associated with a reward. Following the encoding phase, the recall phase starts and subjects are shown both old and new landmarks. Subjects are instructed to indicate via button press which of these pillars was accompanied by a reward and earn the reward by correctly identifying the reward pillar. Recall performance will be assessed using d-prime, which represents how well subjects were able to recall the correct reward location. In total, subjects perform 200 trials across four blocks (50 trials each), resulting in a duration of roughly 30 minutes. For each block of the encoding phase, a single TMS pulses will be delivered at either at the peak, trough, ascending, descending phase of the evoked theta oscillation following the onset of the reward stimulus. (phase target order will be counterbalanced across blocks and subjects). The investigators will then test the effect of phase stimulation on recall performance as assed using d-prime. Identical protocols will be applied to the Sham groups with the exception that the TMS coil will be targeted at electrode position P4 and flipped 180 degrees, preventing pulses from hitting the scalp.

Being tested
Active 10-Hz TMS to the parietal cortex, Active single pulse TMS to the parietal cortex, Sham 10-Hz TMS to the right parietal cortex, Sham single-pulse rTMS the rigt parietal cortex
Keywords
transcranial magnetic stimulation, spatial processing, EEG, neuroimaging
Medical subject headings
Spatial Navigation, Spatial Processing

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Active 10-Hz TMS to the parietal cortexDevice

    The active 10-Hz TMS group will receive 10hz TMS stimulation in the first TMS session, and single pulse TMS in the second TMS session. Participants in the active stimulation group will receive 10-Hz TMS to right parietal cortex. The TMS target will be based on subject specific anatomical MRI images (diffusion imaging). TMS will be delivered using a robotic neuronavigation system (Smartmove, ANT). Stimulation intensity will be standardized at 110% of RMT and adjusted to the skull to cortical surface based on e-field calculations (simnibs). Stimulation will be delivered to the right parietal cortex using an active/placebo figure-8 coil, an magventure TMS device.

  • Active single pulse TMS to the parietal cortexDevice

    The active single pulse TMS group will receive single pulse TMS stimulation in the first and second TMS session. Participants in the active stimulation group will receive single pulse TMS to right parietal cortex. The TMS target will be based on subject specific anatomical MRI images (diffusion imaging). TMS will be delivered using a robotic neuronavigation system (Smartmove, ANT). Stimulation intensity will be standardized at 110% of RMT and adjusted to the skull to cortical surface based on e-field calculations (simnibs). Stimulation will be delivered to the right parietal cortex using an active/placebo figure-8 coil, an magventure TMS device.

  • Sham 10-Hz TMS to the right parietal cortexDevice

    The parameters in the active arms will be as above with the internal randomization of the device internally switching to sham in a blinded fashion.

  • Sham single-pulse rTMS the rigt parietal cortexDevice

    The parameters in the active arms will be as above with the internal randomization of the device internally switching to sham in a blinded fashion.

Study groups in NCT05801861
Study groupRoleWhat they receive
Active 10-Hz rTMSExperimentalFor the first TMS session, participants will receive 10-Hz repetitive TMS (rTMS) delivered at 110% of participants' resting motor threshold over the predefined parietal target for a total of 2250 pulses. For the second TMS session, participants will receive single pulse TMS during the phase target of each task trial and delivered at 110% of participants' resting motor threshold over the predefined parietal target for a total of 200 pulses.
Receives: Device: Active 10-Hz TMS to the parietal cortex
Active single-pulse rTMSExperimentalFor the first TMS session, participants will receive a single TMS pulse during the phase target of each task trial and delivered at 110% of participants' resting motor threshold over the predefined parietal target for a total of 300 pulses. For the second TMS session, participants will receive single pulse TMS during the phase target of each task trial and delivered at 110% of participants' resting motor threshold over the predefined parietal target for a total of 200 pulses.
Receives: Device: Active single pulse TMS to the parietal cortex
Sham 10-Hz rTMSSham comparatorIdentical parameters of the active 10-Hz rTMS group will be applied to the SHAM group with the exception that the TMS coil will be flipped 180º to mimic auditory stimulation.
Receives: Device: Sham 10-Hz TMS to the right parietal cortex
Sham single-pulse rTMSSham comparatorIdentical parameters of the active single-pulse rTMS group will be applied to the SHAM group with the exception that the TMS coil will be flipped 180º to mimic auditory stimulation.
Receives: Device: Sham single-pulse rTMS the rigt parietal cortex

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Event-related Brain Oscillation: Right Posterior Theta

    Right posterior theta (RPT: 4-8 hz) is a scalp recorded brain oscillation sensitive to spatial processing of reward stimulus presented during navigation tasks. RPT will be measured during the presentation of the reward stimulus (Reward, No-reward) during virtual navigation. A time-frequency analysis will be used to measure RPT power for each electrode by averaging the single-trial EEG according to feedback type (reward and no-reward) during the navigation tasks. The size of the RPT will be determined by identifying the maximum amplitude of the RPT response and evaluated at posterior electrodes. The RPT will be measured for each proposed right posterior target across active and sham groups, and used to measure the efficacy of the TMS target to modulate brain activity associated with spatial processing.

    Measured: Day 0 (day of testing)

  2. Spatial Recall performance

    Spatial recall performance learning will be measured using the Linear Track maze. During an initial encoding phase participants are exposed to five pairs of distinct pillars (landmarks), and only one of the pillar location will be paired with a reward cue. Then during the recall phase, participants are presented with old and new landmarks, and must recall which landmark contained the reward. A correct response would result in a 5-cent reward. Recall performance will be assessed using d-prime, which is calculated as the normalized distance between the probability distributions of the hit rate and the false alarm rate. This parameter represents how well subjects were able to maximize correct hits while minimizing false alarms. High recall performance is measured as a subject's ability to correctly identify rewarded pillars and reject non-rewarded pillars, as well as pillars that were not present during the last trial.

    Measured: Day 0 (day of testing)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted6 Apr 2023
  2. Study start24 Mar 2023
  3. Primary completion31 Aug 2026 (estimated)
  4. Study completion31 Aug 2026 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Basic science
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Participant
Enrolment
60 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05801861
Sponsor's protocol ID
Pro2022000444_17-623R
Status last verified
Nov 2025
First submitted
24 Mar 2023
Last updated
17 Nov 2025
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
Individual data sharing
No: Data may be uploaded to an open source framework. All data will be deidentified.

Questions about this trial

What is this clinical trial studying?

A study testing Active 10-Hz TMS to the parietal cortex and Active single pulse TMS to the parietal cortex in people with Spatial Navigation, run by Rutgers, The State University of New Jersey at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 7 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 17 Nov 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Travis E Baker, PhD (973-353-5485, travis.e.baker@rutgers.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Event-related Brain Oscillation: Right Posterior Theta (time frame: Day 0 (day of testing)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Nov 2025; AzTrials last refreshed its copy on 27 Oct 2026.

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