Abstract
The patterns of activity in various movements and resting discharge, both in supine and standing position, in 18 multipara, aged 36-72, were electromyo-graphically investigated, with those in 11 nullipara or primipara, aged 21-46, for comparison. The results obtained from this experiment were as follows:
1. A decrease in the muscle-activity in various movements was found ac-cording to an increase in number of parity.
2. The amplitude of the resting discharge in the internal obliques as an antigravity muscle in a standing position is raised according to an increase in parity. The amplitude of the resting discharge in the internal obliques over 100 μV was found in many multipara. This increase in the resting discharge from the internal obliques was particularly noticeable in over-7-times multipara.
