Inhibition of postural muscle activation with toe-up rotation of floor and the training effect in the elderly

2015 Fiscal Year Final Research Report

• Project/Area Number: 25870953
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Rehabilitation science/Welfare engineering; Applied anthropology
• Research Institution: Japan Health Care College (2015); Osaka Health Science University (2013-2014)
• Principal Investigator: Kiyota Naoe 日本医療大学, 保健医療学部, 講師 (90559189)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 床傾斜 / 適応的抑制 / 筋電図 / 随伴陰性変動

Outline of Final Research Achievements

Repetition of toe-up rotation after repetitive backward translations of floor induce adaptive inhibition of stretch reflex response in the trips surae, which would be related to supraspinal nervous system. This study investigated the changes in the activation of the lower limb, trunk, and shoulder girdle muscles and the contingent negative variation of the brain potential with the toe-up rotations after the backward translations. When the intensity of the rotation was strong, the activation of the triceps surae just after the rotation was adaptively decreased with the repetition of the rotation, and the activation of the thigh and trunk muscles and upper trapezius was also decreased. The brain activation for the anticipatory attention and motor preparation temporally decreased just after the switching of the floor perturbation to the toe-up rotation.

Free Research Field

姿勢制御　神経生理学