Abstract
Upper limb tremor was measured in healthy adult women. Using the fast Fourier transformation (FFT) and the autoregressive (AR) model, total power (TP) and peak frequency were compared by age group. TP was high for women in their 40's and 50's but low for women in their 60's. The rate of TP at peak frequency of 5-8 Hz for women in their 60's tended to be high, but that at 8-14 Hz for women in their 50's and 60's tended to be low. The peak frequency profile for women in their 20's and 30's had two peaks, while that for most women in their 40's had three peaks. The peak frequency profile for women in their 60's mostly had three peaks. The results of the present study clarified the following: the higher the age of the women, the greater the TP, with a greater rate of TP at 5-8 Hz, and a lower rate of TP at 8-14 Hz. Also, with age, there was a shift in the peak frequency profile from two peaks to three peaks.
