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Hand Of Hope (HOH)

The Hand of Hope (HOH) therapy device used for neuromuscular rehabilitation of the hand and forearm that may help patients regain hand mobility through motor relearning. The HOH functions as a biofeedback device where surface electromyography (sEMG) sensors utilising a patient’s own muscle signals to activate their desire to move their hand. These signals are processed and simplified and can be seen through visual feedback that requires the patient to be actively engaged throughout a therapy session.

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HOH — Robotic hand rehabilitation system

The Hand of Hope (HOH) therapy device used for neuromuscular rehabilitation of the hand and forearm that may help patients regain hand mobility through motor relearning. The HOH functions as a biofeedback device where surface electromyography (sEMG) sensors utilising a patient’s own muscle signals to activate their desire to move their hand. These signals are processed and simplified and can be seen through visual feedback that requires the patient to be actively engaged throughout a therapy session.

Therefore with the impairment of a stroke or a brain injury the functional limitation and impaired intentional movement can be presented and utilised as a visual process. The patient’s attention is drawn to a visually displayed EMG signal and consequently it can be used to initiate the task of movement. This biofeedback shown to the patient helps to promote motor learning via interactive use.

A stroke is one of the leading causes of adult disability and hand rehabilitation after a stroke is a very challenging part of a patients recovery thereafter. However, it is well known that sensory signals such as visual sensory inputs reach the those parts of the brain that modulate function and excitability, and therefore this can improve a patient’s motor learning abilities.

Since active participation and the initiation of movement is the key to success, using the biofeedback system the HOH helps to motivate patients to interact with the system during the EMG controlled task-related training regime.

The system can be applied to patients starting from age 8-9 years old.

The hand brace is worn on the dorsal side of the impaired hand with 2 surface sensors attached to the extensor and flexor muscles of the arm to detect the surface electromyographic signals (sEMG) for active participation during exercise. The sEMG signals are processed so the patient can visualise the active movement of the muscle where sEMG electrodes are positioned. No electrical current is applied to the patient

The Hand of Hope therapy device is intended for use in patients that require hand and forearm rehabilitation. Potential goals for the use of HOH could be, but not limited to the following:

  • Motor learning via interactive use of the biofeedback system
  • Help initiation of the voluntary muscle contraction and voluntary movement
  • Maintain voluntary muscle contraction and the voluntary movement
  • To enhance voluntary participation in a rehabilitation setting
  • Decreased muscular activity after Stroke, Spinal Cord Injury, Hand / Finger injury
  • Difficulty to self-initiate, control or maintain voluntary muscle movement
  • Impaired coordination of voluntary movement of the upper limb
  • Initiation of voluntary muscle contraction
  • Motor control and coordination
  • Muscle relaxation
  • Motivation
  • Control of abnormal muscle activity
  • Continuous reinforcement of the correct responses

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