P-3-11-20
Usefulness of an evaluative approach to the dynamic response of lower extremities by the maze-induction type balance board (MIBB)
Hiroyasu Iwatsuki, Junko Iwatsuki (Nagoya Univ. Coll. Ned. Tech., Nagoya, Japan), Atsushi Furukawa (Kusanomi Gakuen Hospital for Cripped Children)
We examined the usefulness of the maze-induction type balance board (MIBB) test, which used for clinical evaluation of dynamic response of lower extremities, to evaluate the postural stability of elderly people in a field. The subjects were seventy two healthy persons (20-83 years old), divided into three groups by ages. The subject was made to take an upright position on MIBB, then to carry out such a task quickly induces a ball within the maze: the time required and the distance of the center of gravity were recorded simultaneously. The measurement was then made both in 2 direct ions, i.e. longitudinal and right & left direction of maze. The results were as follows; 1) The required time of longitudinal and right-left directions in aged group was significantly longer than in young and middle age group. 2) The sway distance of right-left direction in the aged group was significantly longer than in the middle age group.
In conclusion, MIBB test can be said to be useful as a screening test the risk of elderly people's falling down.
P-3-11-21
RELATIONSHIP BETWEEN WEIGHT-BEARING POSTURE AND CENTRAL NERVOUS SYSTEM FUNCTION - A SILENT PERIOD STUDY IN AN UPPER-EXTREMITY -
S DAIKUYA, T SUZUKI*, H HIROSE, S NISHIGUCHI and T FUJIWARA** (Kansai Vocational College of Medicine, Osaka, Japan., *Kansai College of Oriental Medicine, Osaka, Japan., **Ryukoku University, Kyoto, Japan.)
[PURPOSE] The purpose of this study is to clarify the relationship between the weight-bearing position and the central nervous system (CNS) function by recording the silent period (SP) which is a pause in the electric activity of a contracting muscle occurring after nerve stimulation.
[METHOD] We recorded SP on evoked electrolnyography with electrical stimulation in 10 healthy right-handed subjects (9 males and 1 female), non-athletes, with a mean age of 24.9 years. SP was recorded from the right abductor pollicis brevis muscle with the right median nerve stimulation under the following 3 positions; position I is all fours with bilateral elbows not bent, position 2 is all fours with bilateral elbows bent 45 degrees and position 3 is all fours without using left upper-extremity.
[RESULT] SP was changed in proportion to alter postures. SP is 124.3±15.2ms in position 1, 119.6±13.7ms in position 2 and 112.0±13.9ms in position 3. SP shortened remarkably in position 3.
[CONCLUSION] The present findings suggest that CNS function is obviously facilitated in position 3, and the amount of bearing weight is thought to have an effect on SP and CNS function.
