Robot-delivered speech and physical therapy for stroke victims
21 March 2013
Researchers using a humanoid robot to deliver speech and physical therapy to a stroke patient report notable gains and a significant improvement in quality of life.
In one of the earliest experiments using a humanoid robot to deliver speech and physical therapy to a stroke patient, researchers at the University of Massachusetts Amherst saw notable speech and physical therapy gains and significant improvement in quality of life.
Regarding the overall outcome, speech language pathologist and study leader Yu-kyong Choe says, “It’s clear from our study of a 72-year-old male stroke client that a personal humanoid robot can help people recover by delivering therapy such as word-retrieval games and arm movement tasks in an enjoyable and engaging way.”
A major focus of this case study was to assess how therapy interventions in one domain, speech, affected interventions in another, physical therapy, in two different delivery scenarios. Despite the importance of working with other professionals, the authors point out, until now it has been “largely unknown how interventions by one type of therapy affects progress in others.”
The client, with aphasia and physical disability on one side, completed a robot-mediated programme of only speech therapy for five weeks followed by only physical therapy for five weeks in the sole condition, but for the sequential condition he attended back-to-back speech and physical therapy sessions for five weeks.
Over the course of the experiment, the client made “notable gains in the frequency and range of the upper-limb movements,” the authors say. He also made positive gains in verbal expression.
Interestingly, his improvements in speech and physical function were much greater when he engaged in only one therapy than when the two therapies were paired in sessions immediately following each other.
The authors summarise that in such a sequential schedule “speech and physical functions seemed to compete for limited resources” in the brain.
Choe and computer science researcher and robot expert Rod Grupen, director of the Laboratory for Perceptual Robotics at UMass Amherst, are in the second year of a project to investigate the effect of stroke rehabilitation delivered by the humanoid robot, uBot-5. It is a child-sized unit with arms and a computer screen through which therapists interact with the client.
While some may object to robots delivering therapy, the need is great and definitely not being met now, especially in rural areas, Grupen and Choe point out. They hope to aid human-to-human interaction, so a robot can temporarily take the therapist’s place.
Grupen says, “In addition to improving quality of life, if we can support a client in the home so they can delay institutionalisation, we can improve outcomes and make a huge impact on the cost of elder care.