Healthy Volunteers
Conditions
Brief summary
This study has two main goals : * to investigate the impact of aging on cortical excitability (CE) * to investigate the impact of state dependency on CE, using a cognitive task and an emotional one. A Neuronavigation system of transcranial magnetic stimulation is used, and electromyographic response are recorded.
Interventions
Sponsors
Study design
Eligibility
Inclusion criteria
* male or female * age 18-75 * signed informed consent * normal physical examination
Exclusion criteria
* less 18 or more 75 years of age * contra indication to TMS: epilepsia or seizures, metallic head devices, cardiac pacemaker, pregnancy, jet lag or severe insomnia the night before * severe physical disease * treatment with psychotropic drugs * overt psychiatric disease * alcohol consumption before the examination
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Amplitudes of Motor evoked Potentials (µV) for ICI and ICF. | Participants will be followed for an expected average of one month | Motor Evoked Potential (MEP) from the first dorsal interosseous are register during the stimulations. Intracortical Inhibition (ICI) and Facilitation (ICF) are a paired-pulse TMS measure of cortical excitability. A short Interval interstimuli (2ms) leads to a cortical inhibition, which reflects the GABAergic neurotransmission; whereas a longer interval interstimuli leads to a cortical facilitation, which reflects glutamatergic neurotransmission. |
| Durations of Cortical Silent Period (ms) | Participants will be followed for an expected average of one month | Cortical Silent Period (CSP) is a single-pulse TMS measure of cortical inhibition, stimulations are applied while subjects are exerting a muscular contraction of the thum-index pinch and lead to a muscular cancellation. Duration of this silence is measured. |
Countries
France