Effects of temperature on isometric contraction of rat muscle

Truong, Xuan T.; Wall, Betty J.; Walker, Sheppard M.

doi:10.1152/ajplegacy.1964.207.2.393

Cited by 20 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effects of changes in temperature on the twitch and on the tetanus were similar to those reported by others (Truong, Wall & Walker, 1964;Close & Hoh, 1968;Hoh, 1974;Ranatunga, 1977 a); the twitch tension increased almost linearly by 40 % when the temperature was decreased from 37-5 to 20 0C. At 20 0C the twitch tension was 650-3 + 27-0 g/cm2 (n = 11, S.E.…”

Section: Resultssupporting

confidence: 87%

Temperature dependence of enhancement and diminution of tension evoked by staircase and by tetanus in rat muscle

Krarup

1981

The Journal of Physiology

View full text Add to dashboard Cite

SUMMARY1. The effect of temperature (20-37-5 'C) on the potentiation of twitch tension was examined during and after the staircase (250 stimuli, 5/sec) and after the tetanus (188 stimuli, 125/sec) in the extensor digitorum longus muscle of adult Lewis rats.2. During the staircase at 20 'C the twitch tension decreased (negative staircase)by 10-20%. At 25-30 0C the staircase was initially negative and later positive. At 375°C the staircase was positive throughout the train. Both at the end of the staircase and 2 see after the tetanus the potentiation increased linearly with increasing temperature. 3. After the staircase and the tetanus at 20-30 OC the twitch tension increased initially rapidly and later after the staircase at a slower rate. Maximal potentiation at 20 0C was attained 3 min after the staircase ( + 30 + 3 %, n = 10, S.E. of mean) and 1 min after the tetanus (+ 16 +1 %, n = 10, S.E. of mean). At 37-5 0C the potentiation decayed rapidly after the staircase and the tetanus.4. During the staircase the time course of the twitch was shortened twice as much at 20 as at 37-5 0C. At the end of the staircase and 2 see after the tetanus the contraction time was the more prolonged the greater the potentiation. At maximal potentiation the contraction time was prolonged three times as much at 20 'C (+ 19 + 3 %, n = 10, S.E. of mean) as at 37.5 OC (P < 0-005). The half-relaxation time at the end of the staircase was prolonged 10 times more at 20 than at 37-5 0C(P < 0-02).5. When extrapolated to time zero after the staircase and the tetanus the potentiation at 20 0C was still marked (20-50 %). The rate of decay of potentiation (time constant, 20 0C, 561-2 + 37-4 sec, n = 20, S.E. of mean) increased with increasing temperature (Q10 = 2-6). The event of potentiation with a fast rate of decay, present after the tetanus but not after the staircase at 37-5 0C, was abolished below 30 0C.6. The increase in twitch tension after the staircase and the tetanus at 20-30 OC was taken to indicate the recovery of events that diminished the twitch, occurring simultaneously with potentiation.7. (i) One process of diminution, present after the staircase but not after the

show abstract

Section: Resultssupporting

confidence: 87%

Temperature dependence of enhancement and diminution of tension evoked by staircase and by tetanus in rat muscle

Krarup

1981

The Journal of Physiology

View full text Add to dashboard Cite

show abstract

“…Because the physiological processes affecting these two parameters may havi widely different Qlo relationships, the effect of temperature on maximum twitch tension is a complex phenomenon. Maximum twitch tension is, therefore, not a uniquely suitable measure to characterize the influence of temperature on muscle contraction (Hill 1951, Truong et al 1964. Furthermore, we chose to use an isotonic (rather than an isometric) system to make our results directly comparable to the data presented by Wardle (1975Wardle ( ,1977.…”

Section: Discussionmentioning

confidence: 99%

“…The higher levels of Ca+2 cause more actin sites to become available for combination with myosin (i.e., more actinmyosin cross bridges), and higher rates of cross bridge cycling (reviewed by Fuchs 1974). Therefore, the overall effects of higher muscle temperature are shorter latent period, increased speed of contraction at a given load, increased intensity of active state, decreased duration of the active state plateau, and faster tension decay (Truong et al 1964, Close & Hoh 1968, Gabel et al 1968, Podolsky 1968.…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on isotonic twitch of white muscle and predicted maximum swimming speeds of skipjack tuna, Katsuwonus pelamis

Brill

Dizon

1979

Environ Biol Fish

View full text Add to dashboard Cite

SynopsisLatent period, rise time, contraction time, and half relaxation time from isotonic contractions of isolated white muscle samples from skipjack tuna, Katsuwonus pelamis, were determined at 20°, 27", and 34" C. These parameters were found to be inversely proportional to temperature (Q,, = 1.47, 1.67, 1.62, and 1.72, respectively). The data show that contraction time and the effect of temperature on contraction time of skipjack tuna white muscle are not unique when compared to other equal-sized teleosts. Based on contraction time, maximum swimming speeds at each muscle temperature were calculated and found not significantly to exceed the maximum speeds of other equal-sized teleosts, when comparisons are made at the same white muscle temperatures.

show abstract

“…Available data seem to suggest that in mammalian skeletal muscles Po (measured as maximum isometric tetanic tension) has a Q i o of 1.0-1.2 within the temperature range 20--37" C (Truong et al 1964, Close 1965, Close and Hoh 1968, Gabel et al 1968). Available data seem to suggest that in mammalian skeletal muscles Po (measured as maximum isometric tetanic tension) has a Q i o of 1.0-1.2 within the temperature range 20--37" C (Truong et al 1964, Close 1965, Close and Hoh 1968, Gabel et al 1968).…”

Section: Solutionsmentioning

confidence: 99%

“…In this analysis it is implicitly assumed that Po, at a given degree of activation of the myocardium, is independent of temperature. Available data seem to suggest that in mammalian skeletal muscles Po (measured as maximum isometric tetanic tension) has a Q i o of 1.0-1.2 within the temperature range 20--37" C (Truong et al 1964, Close 1965, Close and Hoh 1968, Gabel et al 1968). If a Q i o of 1.2 were also to apply for Po in myocardium, the Qio of V,,, estimated above would be 1.2 times greater than the figure obtained, i.e.…”

Section: Solutionsmentioning

confidence: 99%

The Influence of Temperature on the Force‐Velocity Relationship in Rabbit Papillary Muscle

Edman

Mattiazzil

Nilsson

1974

Acta Physiologica Scandinavica

View full text Add to dashboard Cite

EDMAN, K. A. P., ALICIA MATTIAZZI and E. NILSSON. T h e influence of ternperature on the force-velocity relationship in rabbit papillary muscle. Acta physiol. scand. 1974. 90. 750-756. T h e force-velocity relationship was determined at the moment of isometric peak twitch force in rabbit papillary muscles using the damped-release technique described previously. The analysis was carried out in each muscle at two o r three temperatures within the range 22-33" C. T h e experimental data were fitted with Hill's equation by means of a computer pmgram using the least squares method. Lowering of the temperature caused a n increase of the isometric peak twitch force (Po) and also, generaliy, an increase of the extrapolated value of V,,,, (the shortening velocity a t zero load). T h e temperature-induced changes of the force-velocity curve were interpreted as being the net result of two opposing effects: I . an altered degree of activation of the contractile system caused by a change in the amount of activator-calcium bound to the contractile proteins ('inotropic temperature cffect') , and 2. a change in the rate of interaction between the A and I filaments independent of the degree of activation ('specific temperature effect'). T h e analysis indicated a Q i o of 1.9 for the specific temperature effect. This value accords with the temperature dependence of \',,,:,x that has been observed during tetanic contraction of skeletal muscle.

show abstract

Effects of temperature on isometric contraction of rat muscle

Cited by 20 publications

References 0 publications

Temperature dependence of enhancement and diminution of tension evoked by staircase and by tetanus in rat muscle

Temperature dependence of enhancement and diminution of tension evoked by staircase and by tetanus in rat muscle

Effect of temperature on isotonic twitch of white muscle and predicted maximum swimming speeds of skipjack tuna, Katsuwonus pelamis

The Influence of Temperature on the Force‐Velocity Relationship in Rabbit Papillary Muscle

Contact Info

Product

Resources

About