Effects of Local Vibrations Program of Dorsiflexor Muscles on Neuromotor Recovery in Subacute Stroke Patients.

The program will take place over 40 sessions : 5 sessions per week, for 2 months (40 sessions in total over 8 weeks during the hospitalization in the department); this group will benefit from an effective vibration of a frequency of 100Hz

The program will take place over 40 sessions: 5 sessions per week, for 2 months (40 sessions in total over 8 weeks during hospitalization in the department); this group will not benefit from effective vibration.

Short-distance ambulation speed is measurement between 2 markers on the ground 10 meters apart in a corridor with flat ground, the patient starting his walk 3 meters before to have a launched march disregarding markers, and ends 3 meters After. The stopwatch is started when the markers are crossed.

Long-distance ambulation speed is measured from a standing start and the test involves asking the patient to walk as far as possible in 2 minutes.

The Fugl-Meyer (FMA-LE) assessment of motor skills : measurement of the intensity of reflexes, as well as an assessment of voluntary movements and motor coordination. Score from 0 to 34

The modified Ashworth scale allows the measurement of spasticity, that is to say the measurement of muscle tone by mobilizing the segment of the lower limb and by evaluating the resistance to stretching of the muscles. Score from 0 to 4

The ABILOCO questionnaire evaluate the autonomy in the walking capacities of the patients (13-items)

The Barthel index measure autonomy in daily life.

Evaluate voluntary maximum force in isometric ankle dorsiflexion by Cybex isometric ergometer results.

Assessment of neuromuscular fatigue by electromyograms (EMG). Surface electrodes is place on the tibial muscle anterior to non-invasively collect electromyograms (EMG). The intensity of stimulation will be gradually increased until a plateau in mechanical (strength) and electromyograms (EMG) responses is obtained.

Gait kinematics will be recorded on a force platform (90 x 90 cm, Model 9287C, Kistler, Winterthur, Switzerland) to determine: joint angles, net joint moments and powers at the ankle, knee and hip.

Addition of a temporal component to the traditional quantified gait analysis, allowing the focus to be on time series parameters.

A short questionnaire consisting of 13 questions to which the patient answers on a scale from 0 to 4. The scores are simply added up, inverting the scale for negative sentences, to give a result out of 52 points. The lower the score, the greater the fatigue.