Grip strength rehabilitation system HOH

hand mobilityarm mobilitywrist mobility

Overview
The Hand of Hope (HOH) is a portable, wearable robotic hand (hand brace) for neuromuscular rehabilitation of the hand and forearm. It uses surface electromyography (sEMG) sensors to detect the patient's own muscle signals and provides visual biofeedback to support motor relearning and active engagement during therapy.

How it works
The system is worn on the impaired hand. Two surface sensors are attached to the flexor and extensor muscles of the forearm to record sEMG signals during training. Processed EMG signals are used to trigger a motor in the robotic hand to assist and initiate the intended movement. Assistance is driven by patient-generated EMG and supports movement without forcing it, enabling supervised, patient-initiated activation.

Training and therapy
The device supports rhythmic, task-related training and includes interactive, game-based exercises that increase in complexity to train grasping, hand opening and arm-related tasks. Regular use aims to help re-establish motor pathways and improve performance of daily activities through motivated, active participation.

Application and intended users
Indicated for patients affected by stroke or acquired brain injury to assist motor control, muscle relaxation, coordination and motor relearning. Suitable for patients from approximately 8–9 years old.

Downloads / Related materials
Brochure available: RM-230-HOH3-0001-7 HOH_brochure_eng.pdf
Hand of Hope Experience Programme material available (programme page).

Technical specifications

• Product type: portable, wearable robotic hand / hand brace for neuromuscular rehabilitation of hand and forearm
• Primary sensing: surface electromyography (sEMG) with two surface EMG sensors attached to flexor and extensor forearm muscles
• Control: patient-initiated EMG signals processed to drive motor assistance on the robotic hand
• Feedback: visual biofeedback of processed EMG to support motor relearning and active engagement
• Therapy modality: EMG-controlled task-related training; game-based interactive exercises with progressive difficulty
• Intended outcomes: improve motor control, muscle relaxation, coordination; enable functions such as opening the hand, holding objects and picking items
• Suitable patient age: from approximately 8–9 years old