| Abstract: | The activity of inspiratory and expiratory motor units (MU) has been studied. The statistical data indicate that the recruitment of expiratory motoneurons is slower and more uniform than the recruitment of the inspiratory motoneurons. Most of the expiratory motoneurons showed inhibition shortly before the start of the inspiratory phase. Data are given on other characteristics of the activity and segmental location of both groups of motoneurons. It is postulated that the changes in the MU activity at the beginning and the end of the respiratory period and the coincidence in the extremal activity values of the antagonistic groups are attributable to supraspinal influences.Information Transmission Problems Institute, Academy of Sciences of the USSR, Moscow. Translated from Neirofiziologiya, Vol. 2, No. 3, pp. 289–295, May–June, 1970. |
