Clinical Relevance of the HD sEMG Signals in the Post-stroke Rehabilitation

Inclusion Criteria: Healthy volunteers * Written Informed Consent * Female or male * 18 years or older * Ability to understand the investigation * Willingness to complete all the investigation assessments * Ability to perform the procedures of the investigation * Ability to perform maximal voluntary muscle extension of the target muscle and limb Additional inclusion criteria only for the recreationally active or athletic, healthy volunteers : * Subjects who participated in at least 150 min of moderate activity per week over the last six months. * between 18 and 20 years (preferably) Post-stroke patients * Written informed consent * Female or male * 18 years or older * Have a first-time stroke * Ability to perform maximal voluntary muscle extension of the target muscle and limb * Preserved cognitive capacity to perform the task * Ability to understand the investigation * Willingness to complete all the investigation assessments * Ability to perform the procedures of the investigation Exclusion Criteria: Healthy volunteers * Any significant acute disease state * Skin disorders/allergies at the site of contact with the investigational device * History of skin disease * Known hypersensitivity or allergy to component of the investigational product (e.g. metal alloys) or other materials used (e.g., abrasive gel, foam with polystyrene markers) * Chronic use of medications or treatment Post-stroke patients * History of spinal cord injury or traumatic brain damage * Serious medical illness that precludes performing the task * Severe locomotion disorder due to other causes * Severe neurological disease other than stroke * Any significant acute disease state * Skin disorders/allergies at the site of contact with the investigational device * History of skin disease * Known hypersensitivity or allergy to component of the investigational product (e.g. metal alloys) or other materials used (e.g., abrasive gel, foam with polystyrene markers)