The main objective of this study is the estimation and comparison of the dephasing between the switch heel and the inertial placed on the paretic foot compared to the events of the gait cycle determined by a Gaitrite system (beginning and end of the swing phase) in conditions without stimulation.

Inclusion Criteria:

• patient has had a first ischemic or hemorragic stroke (supratentorial) within the last 6 months for the "recent stroke" group, or more than a year ago for the "old stroke" group
• the patient can walk 10 m without human help, with or without a cane, and a deficit of the foot levator requiring the use of technical assistance to remedy this or involving walking problems
• electrostimulated contraction of the anterior tibialis is possible
• patient has been informed and has signed the consent form

Exclusion Criteria:

• cognitive disorder making participation in the study difficult
• fixed plantar flexion, knee extended below 0°
• patient refuses to sign consent
• patient is not covered by a social security system
• patient is under any kind of guardianship