Authors
Derek B Debicki, Sherry Watts, Paul L Gribble, Jon Hore
Publication date
2010/6/1
Journal
Experimental brain research
Volume
203
Issue
3
Pages
601-613
Publisher
Springer Berlin/Heidelberg
Description
The speed of arm movements is normally increased by increasing agonist muscle activity, but in overarm throwing, an additional effect on speed may come from exploitation of interaction torques (a passive torque associated with motion at adjacent joints). We investigated how the central nervous system (CNS) controls interaction torques at the shoulder and elbow to increase speed in 2-D overarm throwing. Twelve experienced throwers made slow, medium, and fast 2-D throws in a parasagittal plane. Joint motions were computed from recordings made with search coils; joint torques were calculated using inverse dynamics. For slow and medium-speed throws, elbow extension was primarily produced by elbow muscle torque. For fast throws, there was an additional late-occurring elbow extensor interaction torque. Parceling out this elbow extension interaction torque revealed that it primarily arose from …
Scholar articles
DB Debicki, S Watts, PL Gribble, J Hore - Experimental brain research, 2010