{"title":"Is the human arm made of tunable springs?","authors":"F. Popescu, Z. Rymer","doi":"10.1109/IEMBS.1996.651877","DOIUrl":null,"url":null,"abstract":"A study was conducted to determine in what physiological conditions, if any, the human arm deviated from 'spring-like' behavior during movement. Simple, short force pulses applied in mid-motion were found to consistently shift the desired endpoint of a movement across all four subjects. Far from being spring-like, the human arm during simple point-to-point movement did not behave in a conservative manner and could not even be described as a stable passive dynamic system around a desired trajectory. In fact, muscle properties and automatic reflex response can result in significant deviations from the desired trajectory, with over-compensation in the form of an active response, without changes in 'central command'.","PeriodicalId":20427,"journal":{"name":"Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"5 1","pages":"587-588 vol.2"},"PeriodicalIF":0.0000,"publicationDate":"1996-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of 18th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IEMBS.1996.651877","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
A study was conducted to determine in what physiological conditions, if any, the human arm deviated from 'spring-like' behavior during movement. Simple, short force pulses applied in mid-motion were found to consistently shift the desired endpoint of a movement across all four subjects. Far from being spring-like, the human arm during simple point-to-point movement did not behave in a conservative manner and could not even be described as a stable passive dynamic system around a desired trajectory. In fact, muscle properties and automatic reflex response can result in significant deviations from the desired trajectory, with over-compensation in the form of an active response, without changes in 'central command'.
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