A technique for estimating mechanical work of individual muscles in the cat during treadmill locomotion.

A technique for estimating mechanical work of individual muscles in the cat during treadmill locomotion.
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一种估算猫在跑步机运动过程中各个肌肉机械功的技术。

DOI:
10.1016/0021-9290(84)90122-2
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发表时间:
1984
影响因子:
2.4
通讯作者:
Edgerton,VR
Edgerton,VR
中科院分区:
工程技术3区
文献类型:
--
作者:
Whiting,WC;Gregor,RJ;Roy,RR;Edgerton,VR

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在三种不同速度的自由跑步机运动中,对两只成年猫选定的后肢伸展肌力和长度变化的乘积--机械功进行了评估。采用比目鱼肌腱(SOL)和腓肠肌内侧肌腱(MG)上的埋置换能器测力。使用高速摄影技术估计肌肉长度的三维技术被发现比由解剖学和运动学参数得出的二维或三角测量更可取。随着跑步机速度的增加,两块肌肉的长度漂移都会增加。然而,在所有的运动速度下,单关节的SOL比双关节的MG表现出更大的运动范围。跑步机速度的增加导致MG的峰值力量较高,而SOL的峰值力量恒定或略低。这些与速度相关的长度和力量的变化导致随着速度的增加,两个肌肉的总正功更高,总负功更低,净功更高。这些数据说明了三维运动学在确定肌肉长度变化方面的重要性,并描述了随着运动速度的变化,缓慢和快速的脚踝伸肌的相对力和功的变化。
Mechanical work, the product of force and length change, was assessed in selected hindlimb extensors of two adult cats during three different speeds of unrestrained treadmill locomotion. Forces were measured using implanted transducers placed on the soleus (SOL) and medial gastrocnemius (MG) tendons. A three dimensional technique of muscle length estimation using high speed cinematography was found preferable to either two dimensional or trigonometric measurements derived from anatomical and kinematic parameters. Length excursions increased in both muscles as treadmill speed increased. However, at all speeds of locomotion, the uniarticular SOL exhibited a greater range of motion than the biarticular MG. Increases in treadmill speed resulted in higher peak forces in the MG and constant or slightly lower peak forces in the SOL. These speed-dependent changes in length and force resulted in higher total positive work, lower total negative work, and higher net work for both muscles with increasing speeds. These data illustrate the importance of three-dimensional kinematics in determining changes in muscle length and describe the relative force and work changes in a slow and fast ankle extensor with changes in speed of locomotion.
选定的猫跑步机运动期间肌电活动和肌肉力量的相关性。
DOI: 10.1016/0021-9290(83)90079-9
发表时间: 1983
影响因子: 2.4
作者:
Sherif,MH;Gregor,RJ;Liu,LM;Roy,RR;Hager,CL
通讯作者: Hager,CL
DOI: --
发表时间: 1969
期刊: Acta Physiologica Scandinavica
影响因子: --
作者:
I. Engberg;A. Lundberg
通讯作者: A. Lundberg
猫快肌和慢肌的遥测肌电图
DOI: --
发表时间: 1976
期刊: Brain Research
影响因子: 2.9
作者:
B. Betts;Judith L. Smith;R. Edgerton;T. C. Collatos
通讯作者: T. C. Collatos
猫运动过程中肌肉长度变化的 3-D 估计
DOI: --
发表时间: 1982
期刊:
影响因子: --
作者:
W. Whiting;R. Gregor;R. Roy
通讯作者: R. Roy
DOI: 10.1111/j.1748-1716.1972.tb00227.x
发表时间: 1972-01-01
期刊: ACTA PHYSIOLOGICA SCANDINAVICA
影响因子: --
作者:
GRILLNER, S
通讯作者: GRILLNER, S