Motor Imagery in Aphantasia
Condition(s) studied
Investigational drug(s) / intervention(s)
High-definition transcranial direct current (HD-tDCS), active condition: Participants will receive a session of active HD-tDCS at a current intensity of 4 mA for a duration of 15min. The placement of electrodes will be determined to specifically target the primary motor cortex (4 x 1 montage with the anode over C4). During the stimulation, participants will be engaged in a mental training task (sequential finger tapping-task).
High-definition transcranial direct current (HD-tDCS), sham condition: Participants will receive a session of sham HD-tDCS, which will be delivered following the same procedures as active HD-tDCS but the intensity of the current will be set at 4mA during the 30 first seconds at the beginning of the 15-min period of the stimulation, and equal to 0 mA for the reminding period of stimulation to simulate the tingling sensation often experienced by individuals during active stimulation. The placement of electrodes will be determined to specifically target the primary motor cortex (4 x 1 montage with the anode over C4). During the stimulation, participants will be engaged in a mental training task (sequential finger tapping-task).
Study summary
The present study aims to characterize and modulate motor imagery abilities in individuals with aphantasia. The investigators will characterize the neurophysiological and physiological underpinnings of mental imagery abilities in participants with aphantasia by investigating several indices of motor imagery abilities and comparing them to participants with typical mental imagery abilities. The investigators will investigate whether non-invasive brain stimulation applied to the primary motor cortex improves mental imagery abilities in participants with aphantasia.
Eligibility
Primary outcome measure(s)
- Gains in motor performance following mental training — 2 times: immediately before tDCS (baseline) and immediately after tDCS
Gains in motor performance following mental training combined with tDCS will be measured using a sequential finger tapping-task. Gains following training will be expressed as a percentage of the baseline performance.
Trial sites (1)
| Facility | City | Region | Status |
|---|---|---|---|
| Centre Hospitalier le Vinatier | Bron | France | Recruiting |
More Hôpital le Vinatier trials in France
Other trials for the same condition
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
View NCT06140940 on ClinicalTrials.gov ↗ ← All trials in France