Please select the eligibility criteria that correspond to the clinical trial below.
Title: N/A
Brief Summary: Noninvasive brain stimulations (NIBS) will be used in healthy volunteers and in chronic stroke patients to improve bimanual activities and motor learning.

Functional magnetic resonance imaging will be used to evaluate the mechanisms underlying bimanual activities and motor learning in healthy volunteers and in chronic stroke patients.

A neuro-rehabilitation robot (REA2PLAN, AXINESIS, Louvain-la-Neuve, Belgium) will be used for motor learning.


Options:
A: Inclusion Criteria:

* an ability to complete 10º of wrist or finger extension from a 60 - 65 º flexed position
* score less than a 56 on the UE subscale of the Fugl-Meyer Assessment
* an ability to voluntarily activate slight movements in the wrist and fingers so that the EMG activity reaches a minimal level on the microprocessor for electrical stimulation to be activated
* unilateral, first stroke of ischemic or hemorrhagic origin in the carotid artery distribution
* free of major post stroke complications
* able to attend therapy 2 days/week or 4 days/week for 2 weeks
* score at least a 16 on the Mini Mental Status Examination
* able to discriminate sharp from dull and light touch using traditional sensation tests.

Exclusion Criteria:

* hemiparetic arm is insensate
* motor impairments from stroke on opposite side of body
* pre-existing neurological disorders such as Parkinson's disease, Multiple Sclerosis, or dementia
* Legal blindness or severe visual impairment; 5) Life expectancy less than one year
* Severe arthritis or orthopedic problems that limit passive ranges of motion of upper extremity (passive finger extension \< 40º; passive wrist extension \< 40º; passive elbow extension \<40º; shoulder flexion/abduction \< 80º)
* History of sustained alcoholism or drug abuse in the last six months
* Has pacemaker or other implanted device
* pregnant
B: Inclusion Criteria:

• stroke with at least slight deficit

Exclusion Criteria:

* epilepsy
* contraindication to tDCS and/or to fMRI
* presence of metal in the head
* inability to understand / complete behavioral tasks
* chronic intake of alcohol or recreational drugs
* major health condition
* presence of pacemaker (for the fMRI part only)
* pregnancy
C: Inclusion criteria:

* Males and females subjects. Age \> 18 years, \<75 years.
* Diagnosis of first ischemic stroke \> 6 months.
* MMSE\>24;
* FAC higher or equal to 4

Exclusion Criteria:

* Contraindications to tDCS: intracranial metal implants that can be stimulated, incorrectly positioned or over-heated by the electric current, presence of a history of epilepsy, frequent headaches or neck pain, implantable devices (ventriculoperitoneal shunts, pacemakers, intrathecal pumps, intracranial metal implants).
* Neurological or psychiatric pathology.
* Severe cardio-pulmonary, renal, hepatic diseases.
* Pregnancy.
D: Inclusion Criteria:

* All subjects must be between the ages of 18-90 and must not be pregnant.
* Patients volunteer to participate in the study, with a written informed consent signed
* Affiliation to a national health insurance program
* First-time clinical ischemic or hemorrhagic cerebrovascular accident - evidenced by a radiological (or physician's) report
* Contralesional motor deficit
* Lesion sparing primary motor cortex
* Stroke onset \>1 month and \<6 months prior to study enrollment

Exclusion Criteria:

* Coexistent major neurological or psychiatric disease as to decrease number of confounders
* History of epilepsy before stroke (or episodes of seizures within the last six months)
* Any substantial decrease in alertness, language reception, or attention that might interfere with understanding instructions for motor testing
* Subjects with global aphasia and deficits of comprehension
* Excessive pain in any joint of the paretic extremity (VAS\>4)
* Contraindications to Tdcs : metal in the head, implanted brain medical devices
* Coexistent major neurological or psychiatric disease as to decrease number of confounders
* A history of significant alcohol or drug abuse in the prior 6 months
* Anyone who is currently taking or who has taken anti-malarial treatment in the last 72 hours
* Subjects may not have already received constraint induced motor therapy and/or tDCS treatment for stroke
* Pregnancy

Answer: B