Joint loading of the thumb while operating a mechanical pipette - and inverse dynamic analysis.
Wu-JZ; Sinsel-EW; Gloekler-DS; Wimer-BM; Zhao-KD; An-K-N; Buczek-FL
Proceedings of the 35th Annual Meeting of the American Society of Biomechanics, August 10 - 13, 2011, Long Beach, California. Newark, DE: The American Society of Biomechanics, 2011 Aug; :426
Our results show that the force-displacement curves of the pipette plunger button in loading differ from those in the un-loading process, which is consistent with a previous study. During the loading process, work is done by the musculoskeletal system to push the plunger, whereas the potential energy stored in the pipette spring mechanism is given back to the hand system during the unloading process. The joint power absorption during the unloading is mainly caused by the CMC joint that produces resistant flexion moment in the presence of extension; this action controls the speed of the compressed spring returning to its resting length.
Muscle-function; Muscle-contraction; Muscles; Musculoskeletal-system-disorders; Hand-injuries; Biomechanics; Biomechanical-modeling; Ergonomics; Laboratory-workers; Laboratory-work
John Z Wu, National Institute for Occupational Safety and Health, Morgantown, WV, USA
Proceedings of the 35th Annual Meeting of the American Society of Biomechanics, August 10 - 13, 2011, Long Beach, California