No abstract

No abstract

Balance has properties of steadiness, symmetry and dynamic stability and plays an important role in relation to rehabilitation of fallen or hemiparalyzed patients. In this study, degrees of muscle activities of lower limb muscles like tibialis anterior, gastrocnemius, rectus femoris and biceps femoris were analyzed in relation to balance according to direction of shift in balance of human body by making use of self-developed balance board. Power spectral density value was used to compare the relative inter-muscular muscle activities according to inclination in 4 directions of front, back, left and right, as well as to compare degrees of muscle activity at front and back directions according to flexion and extension of knee joint. Results showed much muscle activities for tibialis anterior and rectus femoris of the opposite leg when leaning to the left or right while much muscle activities were present for gastrocnemius and tibialis anterior when leaning to the front and back, respectively.

No abstract

Hand grip strength has been utilized as an indicator to evaluate the motor ability of hands, responsible for performing multiple body functions. It is however difficult to evaluate other factors (other than hand muscular strength) utilizing the hand grip strength only. The purpose of this study was analyzed the motor ability of hands using EMG and the hand grip strength, simultaneously in order to evaluate concentration, muscular strength reaction time, instantaneous muscular strength change, and agility in response to visual reaction. In results, the average time (and their standard deviations) of muscular strength reaction EMG signal and hand grip strength was found to be 209.6±56.2 ms and 354.3±54.6 ms, respectively. In addition, the onset time which represents acceleration time to reach 90% of maximum hand grip strength, was 382.9 ± 129.9 ms. Results in visual reaction (on) indicate the differences in muscular strength agility and concentration of participants in regards to visual reaction.