Effect of the Transcranial Direct Current Stimulation (tDCS) on Dependent Smoking People (TabaSCo)

Evaluation de l'Effet de la Stimulation Transcranienne en Courant Continu Chez Les Personnes Tabagiques dépendantes

The purpose of this study is to evaluate the effect of 10 sessions of anodal transcranial Direct Current Stimulation (tDCS - 1 mA) applied to left vs right CDLPF of tobacco-dependent subjects compared to the application of a placebo tDCS (sham procedure) on the craving, which is evaluated by the item 1 of Fagerström test between day 1 and day 10. Craving is also evaluated 1 month post-treatment.

Tobacco is the second leading cause of death worldwide. It is currently responsible for the death of one in 10 adults (about 5 million deaths per year) and it is the fourth disease risk factor in the world. Many methods to quit smoking are available but in all cases, relapse is a common phenomena. The main risk factor for relapse is craving. So, acting on the craving seems essential to modulate tobacco consumption. Many functional neuroimaging studies have established a neuroanatomical substrate for craving process, in particularly dorsolateral prefrontal cortex (DLPFC), accessible par neuromodulation.

tDCS is a non-invasive neuromodulation method, which delivers a constant current of low intensity (1 mA) during 30 min for 10 sessions. Anode is placed on the scalp facing on left DLPFC and cathode on right DLPFC.

tDCS differs from active tDCS by the interruption of stimulation after 15 sec and reactivation of the stimulation 15 sec before the end of the session (30 min - 10 sessions). Anode is placed on the scalp facing on left DLPFC and cathode on right DLPFC.

tDCS is a non-invasive neuromodulation method, which delivers a constant current of low intensity (1 mA) during 30 min for 10 sessions. Anode is placed on the scalp facing on right DLPFC and cathode on left DLPFC.

tDCS differs from active tDCS by the interruption of stimulation after 15 sec and reactivation of the stimulation 15 sec before the end of the session (30 min - 10 sessions). Anode is placed on the scalp facing on right DLPFC and cathode on left DLPFC.

After locating the stimulation areas, treatment will be delivered during 30-minute session. Treatment will be occur 1 session per day during 10 days (5 days per week during 2 successive weeks). Subjects will be monitored during tDCS for any side effects or adverse events.

Inclusion Criteria: Fagerström score ≥ 5 Q-MAT score ≥ 6 smoking subjects from 10 to 30 cigarettes a day right-handed subjects w/o severe progressive somatic pathology (especially tumor diseases, degenerative diseases) Hamilton Depression Rating Scale-17 score <18 Exclusion Criteria: pregnancy and/or lactation presence of a specific contraindication for tDCS (e.g. personal history of epilepsy, metallic head implant, cardiac pacemaker...)

CHRU Besancon - Service de Psychiatrie - Centre Investigation Clinique Innovation Technologique (CIC-IT808)