Characterizing the Neural Bases of Motivational Disorders After Stroke

Inclusion Criteria (healthy volunteers): * Right-handed * Age \> 18 years old * Able to squeeze a hand-grip * Signature of consent form * Affiliation to an Health Insurance Scheme or beneficiary of such a scheme Inclusion Criteria (patients): * Age \> 18 years old * Able to squeeze a hand-grip * Signature of consent form * Affiliation to an Health Insurance Scheme or beneficiary of such a scheme * Stroke of the medial frontal lobe and not affecting the lateral frontal lobe OR stroke of the lateral frontal lobe and not affecting the medial frontal lobe Exclusion Criteria (healthy volunteers): * Under justice protection * History of neurological or psychiatric diseases * Evolving disease that could impede volunteer participation during the whole study * Ongoing psychotropic drug or stopped for less than 3 weeks * Treatment that could interfere with subject performance * Chronical use of illicit psychoactive drugs or the day of the exam * Pregnant, parturient or breastfeeding woman * Exclusion period of another research * Contra-indication to MRI scan * Comprehension difficulties or difficulties to perform the study cognitive tests Exclusion Criteria (patients): * Under justice protection * Evolving disease that could impede volunteer participation during the whole study * Chronical use of illicit psychoactive drugs or the day of the exam * Pregnant, parturient or breastfeeding woman * Exclusion period of another research * Contra-indication to MRI scan * Comprehension di…