Some Conditions Affecting the Capacity for Prolonged Muscular Work

Campos, Francesco; Cannon, W. B.; Lundin, Hans; Walker, Tom

doi:10.1152/ajplegacy.1929.87.3.680

Cited by 36 publications

(27 citation statements)

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“…Average and intense exercise done by our sympathectomized animals equals or surpasses the maxima performance of many normal dogs used by Campos, Cannon, Lundin and Walker [1929]. The exercise is accomplished without effort, the muscular co-ordination is faultless.…”

Section: Heart Rate Of Sympathectomized Dogmentioning

confidence: 85%

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The heart rate of the sympathectomized dog in rest and exercise

Brouha¹,

Cannon²,

Dill³

1936

The Journal of Physiology

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MUSCULAR exercise is accompanied by acceleration of the heart rate. The factors which determine this acceleration, and the heart rate attained in various standard degrees of exercise, have been studied in numerous experiments.After completely denervating the heart of a dog, and excluding chemical stimulation from the adrenal medulla and from the liver, Campos, Cannon, Lundin and Walker [1929] found that the heart rate was only slightly accelerated (12 beats at most), and that the muscular performance on a treadmill was greatly diminished. Samaan [1935], who performed a similar experiment after cutting the cardio-accelerators, except that he suppressed vagal impulses by atropine, noted that the heart rate never rose more than 18-29 beats instead of 110-130. His animals then performed the standard exercise with difficulty and showed intense signs of exhaustion. On the other hand, when the accelerator nerves alone were excluded by removal of the upper thoracic sympathetic chains, the dogs performed the standard work with apparent ease. Indeed Samaan makes the statement that in such animals, deprived of the nerves which positively make the heart beat more rapidly, the maximum capacity for doing work is markedly augmented.In dogs deprived of the cardio-accelerator and splanchnic innervations determinations of the maximal endurance show a definite increase of the capacity comparable with that observed in animals without cardio-accelerator sympathetic innervation according to S a ma a n. However, the maximal tachycardia which was observed towards the end of the standard work was 105-121, an increase Advanced fellow of the C.R.B. Educationa Foundation. 23-2

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Section: Heart Rate Of Sympathectomized Dogmentioning

confidence: 85%

“…This fact explains why the figures printed here are so much higher than those recorded in experiments where the pulse was taken immediately after exercise. Campos, Cannon, Lundin and Walker [1929], for example, have recorded 192 as the maximum rate in normal animals. In one instance their normal dog " E" had a heart rate of 120 for exercise of 138 kg.m.…”

mentioning

confidence: 99%

The heart rate of the sympathectomized dog in rest and exercise

Brouha¹,

Cannon²,

Dill³

1936

The Journal of Physiology

Self Cite

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show abstract

“…As Oliver and Schafer's extract contained both adrenalin and cortin, their results must be due to cortin rather than adrenalin effects. It has been shown, moreover, that the complete bilateral removal of the adrenal medulla or of the sympathetic nervous system does not reduce work capacity in the intact animal (13,15,29). In fact, Harris and Ingle (33) found a slight but significant increase in adreno-demedullated rats during moderate exercise.…”

Section: University Of Torontomentioning

confidence: 99%

Physiological differentiation of emotional states.

Arnold¹

1945

Psychological Review

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“…The literature has been reviewed recently by Rice and Steinhaus [1931], by Campos, Cannon, Lundin and Walker [1929], and by Dische and Goldhammer [1932] SUMMARY. A study has been made of three factors which may limit the capacity of a dog for work-external temperature, supply of oxygen, and supply of fuel.…”

Section: B Dill H T Edwards and J H Talbottmentioning

confidence: 99%