Gradual potentiation of isometric muscle force during constant electrical stimulation
Gradual potentiation of isometric muscle force during constant electrical stimulation
复制标题
持续电刺激期间等长肌力逐渐增强
DOI:
--
复制
发表时间:
2006
影响因子:
3.2
通讯作者:
G. Khang
中科院分区:
文献类型:
--
作者:
G. Eom;Takashi Watanabe;N. Hoshimiya;G. Khang
An investigation was carried out into how stimulation frequency and stimulation history affect the potentiation of muscle force during 20s of constant stimulation of the two knee extensors in isometric conditions. Stimulation frequency significantly affected the potentiation pattern: low-frequency (2.5–10 Hz) stimulation showed a reduction and subsequent enhancement of force, and high-frequency (14.3–25 Hz) stimulation showed only enhancement of force. The degree of enhancement in force and time-to-peak decreased with the stimulation frequency. Whereas conditioning stimulation (both 40 Hz and 14.3 Hz) significantly enhanced the muscle force above 85%, following main stimulation (14.3 Hz) after short rest (10 s and 50 s, respectively) induced little force enhancement (below 8%). In particular, when the frequency of the conditioning stimulation was 14.3 Hz, the initial force at the main stimulation showed a very similar value to the final force value of the conditioning stimulation (above 90% similarity). The potentiated twitch force slowly decayed during rest, with an average time constant of 2.4 min. These observations indicate that muscle potentiation depends on the stimulation frequency and stimulation history, and therefore a computer model of potentiation can play an important role in predicting muscle force and body movement induced by electrical stimulation.
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影响因子:
3.4
作者:
CANNELL, MB;ALLEN, DG
通讯作者:
ALLEN, DG
DOI:
10.1073/pnas.87.1.414
发表时间:
1990
影响因子:
11.1
作者:
Sweeney,HL;Stull,JT
通讯作者:
Stull,JT
影响因子:
--
作者:
F. Zajac
通讯作者:
F. Zajac
DOI:
10.1006/jsbi.1998.3979
发表时间:
1998
期刊:
Journal of structural biology.
影响因子:
--
作者:
Yang,Z;Stull,JT;Levine,RJ;Sweeney,HL
通讯作者:
Sweeney,HL
DOI:
10.1021/bi982553g
发表时间:
1999
期刊:
Biochemistry.
影响因子:
--
作者:
Adhikari,BB;Somerset,J;Stull,JT;Fajer,PG
通讯作者:
Fajer,PG