Motor Systems: PDF OnlyTwitch/tetanus ratio and its relation to other properties of motor unitsCelichowski, Jan; Grottel, Kazimierz Author Information Corresponding Author Department of Neurobiology, Academy of Physical Education, 10, Droga Debinska Str., 61–555 Poznan, Poland NeuroReport: December 1993 - Volume 5 - Issue 3 - p 201-204 Buy Abstract The ratio of single twitch tension to maximal tetanic tension (Tw/Tet ratio) represents one of the physiological properties of single motor units. In our study, in agreement with the results of other studies, the mean Tw/Tet ratio of slow motor units was lower than that of fast motor units. But we found that the Tw/Tet ratios of the slow motor units with twitch tension between 0.75 and 1.5 g were higher than those of fast motor units with twitch tension in the same range. A significant linear relation between Tw/Tet ratio and twitch tension was obtained for the three types of motor units. This relationsip could be due to the increasing number of muscle fibres within a motor unit with the twitch tension. © Lippincott-Raven Publishers.
