Top > Research results > Joint research > Fear of pain associated with exercise slows motor control Kio University and the University of Tokyo

2021/6/11

Fear of pain associated with exercise slows motor control Kio University and the University of Tokyo

University Journal Online Editorial Department

　Patients with musculoskeletal disorders become frightened of exercise by experiencing repeated pain with each movement.And when exercise fear occurs, he adapts his body's exercise strategy to minimize pain.For example, if slow movement reduces pain, the patient adapts to slow movement of the limb, but these protective exercise strategies promote organic and pain in the body and are greater. It may lead to.

　This time, the group at Kio University and the University of Tokyo used a pain fear conditioning model in the reach-grabbing exercise (pain is given immediately after the subject completes the exercise to reach the target), and anticipation and fear of pain are expressed. We investigated how to change the locus of movement and muscle contraction.As a result, due to the anticipation and fear of pain associated with exercise, "feedback exercise control" that adjusts the exercise based on the obtained sensation is first slowed down, and then "feedforward exercise control" that performs the exercise predictively. Was found to slow down.It was also found that the background of this modulation is related to the increase in co-contraction of agonist / antagonist muscles.

　On the other hand, it was also found that when the pain associated with exercise disappeared, the slowing and co-contraction of exercise gradually returned to normal.For this modulation as well, the feedback control was restored first, and then the feedforward control was restored.

　These results suggest that protective motor abnormalities in musculoskeletal disorders may be caused by motor fear.It also suggests that it is important to evaluate the processes by which motor control disorders occur in order to identify the factors that influence the chronicity of pain.In the future, he plans to conduct a more detailed analysis of motor control and muscle output due to musculoskeletal disorders, and then consider interventions based on the results.

Paper information:[Scientific Reports] Kinematic Changes in Goal-directed Movements in a Fear-conditioning Paradigm

Tokyo University

Established in the 10th year of the Meiji era.A university with the longest history in Japan and at the forefront of Japanese knowledge

The University of Tokyo was established in 1877 (Meiji 10) by integrating the Tokyo Kaisei School and the Tokyo Medical School.Since its establishment, it has developed education and research in a unique way in the world as a leading university in Japan and an academic center for the fusion of East and West cultures.As a result, many human resources have been produced in a wide range of fields, and many research achievements […]

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Kio University

Achieved a 17% employment decision rate for all graduates over 99.2 years.A university that emphasizes practical studies to develop specialists in health and education

Kio University is a university that emphasizes practical science and trains professionals in the fields of health and education, such as physical therapists, nurses, midwives, registered dietitians, architects, elementary school teachers, kindergarten teachers, school nurses, and childcare workers. .The employment decision rate for all graduates over the 17 years since the university opened was 99.2%*, and it has been evaluated as a ``university that is strong in employment.''

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