Electrical and mechanical responses of chromatophore muscle fibers of the squid, Loligo opalescens, to nerve stimulation and drugs

1969 ◽  
Vol 65 (1) ◽  
pp. 98-130 ◽  
Author(s):  
Ernst Florey ◽  
Mahlon E. Kriebel
Keyword(s):  
Nerve Stimulation ◽  
Muscle Fibers ◽  
Mechanical Responses ◽  
Loligo Opalescens

A mathematical model of mechanical responses of contracting muscle fibers to temperature jumps

BIOPHYSICS ◽  
2009 ◽  
Vol 54 (4) ◽  
pp. 525-530
Author(s):  
N. A. Koubassova ◽  
S. Yu. Bershitsky ◽  
A. K. Tsaturyan
Keyword(s):  
Mathematical Model ◽  
Muscle Fibers ◽  
Contracting Muscle ◽  
Mechanical Responses ◽  
Temperature Jumps

Effect of acute nutritional deprivation on diaphragm structure and function

1990 ◽  
Vol 68 (5) ◽  
pp. 1938-1944 ◽  
Author(s):  
M. I. Lewis ◽  
G. C. Sieck
Keyword(s):  
Nerve Stimulation ◽  
Muscle Fibers ◽  
Medial Gastrocnemius ◽  
Fatigue Properties ◽  
Muscle Stimulation ◽  
Type I ◽  
Cross Sectional ◽  
Nutritional Deprivation ◽  
Nerve Muscle

The influence of 90 h of acute nutritional deprivation (ND) on the cross-sectional areas of muscle fibers and the contractile and fatigue properties of the adult rat diaphragm were determined. Isometric contractile properties and fatigue resistance of the diaphragm were measured by means of an in vitro nerve-muscle strip preparation. Contractions were evoked by using phrenic nerve stimulation (left hemidiaphragm) or direct muscle stimulation (right hemidiaphragm) in the presence of curare. Acute ND resulted in a 20% reduction in body weight. No significant decrements in diaphragm or soleus weights were noted in the ND animals compared with controls (CTL), whereas the weight of the medial gastrocnemius was reduced by 20% in the ND animals. Peak twitch and tetanic tensions (normalized for the weight of the diaphragm strip) were not reduced in ND compared with CTL animals after either nerve or muscle stimulation. The fatigue index of the diaphragm was significantly reduced in ND animals only after nerve stimulation. After the fatigue test, there was rapid recovery of the additional fatigue noted with nerve stimulation. The proportions of type I and II muscle fibers of the diaphragm were similar in the CTL and ND animals. No differences in diaphragm cross-sectional areas were noted for either type I or II muscle fibers in the CTL and ND animals. It is concluded that acute ND has no effect on diaphragm contractility or morphometry and only an inconsequential influence on diaphragm fatigue.

scholarly journals Acupuncture modulates mechanical responses of smooth muscle produced by transmural nerve stimulation in gastric antrum of genetically hyperglycemic rats

2009 ◽  
Vol 45 (4) ◽  
pp. 167-185 ◽  
Author(s):  
Hiroyasu Fukuta ◽  
Makoto Koshita ◽  
Eri Nakamura ◽  
Hironori Nakamura ◽  
Atsushi Yamada ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Nerve Stimulation ◽  
Gastric Antrum ◽  
Mechanical Responses

Mechanical responses evoked by nerve stimulation in gastric muscles of mouse lacking inositol trisphosphate receptor

2001 ◽  
Vol 87 (2-3) ◽  
pp. 249-257 ◽  
Author(s):  
Hiromichi Takano ◽  
Kenro Imaeda ◽  
Yoshimichi Yamamoto ◽  
Kunio Kato ◽  
Katsuhiko Mikoshiba ◽  
...  
Keyword(s):  
Nerve Stimulation ◽  
Inositol Trisphosphate ◽  
Inositol Trisphosphate Receptor ◽  
Mechanical Responses ◽  
Trisphosphate Receptor

Mechanical responses of the body wall muscle of the earthworm, Lumbricus terrestris, to segmental nerve stimulation

1971 ◽  
Vol 49 (12) ◽  
pp. 1527-1534 ◽  
Author(s):  
Charles D. Drewes ◽  
Ralph A. Pax
Keyword(s):  
Nerve Stimulation ◽  
Longitudinal Muscle ◽  
Circular Muscle ◽  
Lumbricus Terrestris ◽  
Repetitive Stimulation ◽  
Second Phase ◽  
Muscle Response ◽  
Mechanical Responses ◽  
Segmental Nerve ◽  
Earthworm Lumbricus

Suitable nerve–muscle preparations are described for recording the electrical and mechanical responses of the longitudinal and circular muscle to segmental nerve stimulation in the earthworm, Lumbricus terrestris. The longitudinal muscle response to prolonged repetitive stimulation consists of a smooth increase in tension to form a peak in less than 10 s followed by a slow decline in tension to about one-half peak tension in 45 s. The circular muscle response to prolonged repetitive stimulation consists of two distinct phases of tension development: an initial, rapidly developing peak resembling that in longitudinal muscle and a slow, irregularly developing second phase. The circular and longitudinal muscle responses are obtained at frequencies above f or 2/s, with the amplitude of each response being a function of the stimulus strength within a range of 0.4–1.4 V (2 ms) and the stimulus frequency within a range of 5–50/s. In addition there is a threshold-dependent inhibition of the second phase of the circular muscle response.Circular and longitudinal responses to single stimuli are obtained with stimulus strengths approximately 10 times greater than those of the responses to repetitive stimulation and the amplitude of these responses appears to be a function of the strength of stimulation. The single stimulus response appears to be a result of repetitive firing in the same motor fibers which mediate the response to repetitive stimulation.

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