Background:Human eye muscle tension has been measured directly only in detached condition.The purpose of this study is to compare force development in single,horizontal human eye muscle during saccadic eye movements,f...Background:Human eye muscle tension has been measured directly only in detached condition.The purpose of this study is to compare force development in single,horizontal human eye muscle during saccadic eye movements,first when the muscle was still attached and later when it was detached from the globe.Methods:Eleven horizontal muscles of eight patients were examined during surgery under topical anesthesia for concomitant strabismus.None of the muscles examined had been operated before.Isometric muscle tension was recorded with a strain gauge system,to which the muscle tendon was attached by a silk suture.The subjects made saccadic eye movements with the non-recorded eye by fixating light-emitting diodes in the center and at 10,20,and 30° horizontally to each side.Continuous and stepwise saccades were produced.In the tension signals,peak tension(Fp),steady tension(Fs),and the ratio Fp/Fs were measured.Statistical analysis was done with multivariate analysis of variance.Results:The values of Fp,Fs,and Fp/Fs at different amplitudes of the saccadic eye movements were compared in the attached and the detached muscle.There were no consistent statistical differences between the values obtained in the two conditions.Conclusions:The muscle force development,measured at the tendon,was the same in muscles attached to the globe and in muscles free from the globe.Thus isometricmuscle tension can be adequately recorded in muscles still attached to the globe,which increases the possibilities for studying contractile properties of various eye muscles during ophthalmic surgery procedures performed under topical anesthesia.展开更多
改变各学科分离状态,实现学科整合,是课程发展的前端课题。语言和音乐,这两门学习科目有什么关系?这是课程整合应当关注的问题,为此,我向大家推荐一本可为课程整合奠定理论基础的著作,名字叫《音乐、语言与脑》(Music,Language,and the ...改变各学科分离状态,实现学科整合,是课程发展的前端课题。语言和音乐,这两门学习科目有什么关系?这是课程整合应当关注的问题,为此,我向大家推荐一本可为课程整合奠定理论基础的著作,名字叫《音乐、语言与脑》(Music,Language,and the Brain)。我与这本书是偶然相遇的。2015年元旦,我去国家大剧院欣赏专场音乐会,中间休息时,在服务台上发现了这本书,立刻被题目所吸引。这个小小的契机,展开更多
文摘Background:Human eye muscle tension has been measured directly only in detached condition.The purpose of this study is to compare force development in single,horizontal human eye muscle during saccadic eye movements,first when the muscle was still attached and later when it was detached from the globe.Methods:Eleven horizontal muscles of eight patients were examined during surgery under topical anesthesia for concomitant strabismus.None of the muscles examined had been operated before.Isometric muscle tension was recorded with a strain gauge system,to which the muscle tendon was attached by a silk suture.The subjects made saccadic eye movements with the non-recorded eye by fixating light-emitting diodes in the center and at 10,20,and 30° horizontally to each side.Continuous and stepwise saccades were produced.In the tension signals,peak tension(Fp),steady tension(Fs),and the ratio Fp/Fs were measured.Statistical analysis was done with multivariate analysis of variance.Results:The values of Fp,Fs,and Fp/Fs at different amplitudes of the saccadic eye movements were compared in the attached and the detached muscle.There were no consistent statistical differences between the values obtained in the two conditions.Conclusions:The muscle force development,measured at the tendon,was the same in muscles attached to the globe and in muscles free from the globe.Thus isometricmuscle tension can be adequately recorded in muscles still attached to the globe,which increases the possibilities for studying contractile properties of various eye muscles during ophthalmic surgery procedures performed under topical anesthesia.
文摘改变各学科分离状态,实现学科整合,是课程发展的前端课题。语言和音乐,这两门学习科目有什么关系?这是课程整合应当关注的问题,为此,我向大家推荐一本可为课程整合奠定理论基础的著作,名字叫《音乐、语言与脑》(Music,Language,and the Brain)。我与这本书是偶然相遇的。2015年元旦,我去国家大剧院欣赏专场音乐会,中间休息时,在服务台上发现了这本书,立刻被题目所吸引。这个小小的契机,
