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Effect of arterial occlusion on responses of group III and IV afferents to dynamic exercise

Adreani, Christine M ; Kaufman, Marc P

Journal of applied physiology (1985), 1998-06, Vol.84 (6), p.1827-1833 [Periódico revisado por pares]

Bethesda, MD: Am Physiological Soc

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Título:
Effect of arterial occlusion on responses of group III and IV afferents to dynamic exercise
Autor: Adreani, Christine M ; Kaufman, Marc P
Assuntos: Animals ; Arterial Occlusive Diseases - physiopathology ; Biological and medical sciences ; Blood ; Blood vessels ; Carbon Dioxide - blood ; Cats ; Electric Stimulation ; Electromyography ; Exercise ; Fundamental and applied biological sciences. Psychology ; Hindlimb - blood supply ; Hindlimb - innervation ; Hindlimb - physiology ; Hydrogen-Ion Concentration ; Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration ; Muscular system ; Nervous system ; Neurons, Afferent - physiology ; Oxygen - blood ; Physical Exertion - physiology ; Regional Blood Flow - physiology ; Vertebrates: nervous system and sense organs
É parte de: Journal of applied physiology (1985), 1998-06, Vol.84 (6), p.1827-1833
Notas: ObjectType-Article-2
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Descrição: Division of Cardiovascular Medicine, Departments of Internal Medicine and Human Physiology, University of California, Davis, California 95616 Our laboratory has shown previously that a low level of dynamic exercise induced by electrical stimulation of the mesencephalic locomotor region (MLR) stimulated group III and IV muscle afferents in decerebrate unanesthetized cats (C. M. Adreani, J. M. Hill, and M. P. Kaufman. J. Appl. Physiol. 83: 1811-1817, 1997). In the present study, we have extended these findings by examining the effect of occluding the arterial supply to the dynamically exercising muscles on the afferents' responses to MLR stimulation. In decerebrate cats, we found that arterial occlusion increased the responsiveness to a low level of dynamic exercise in 44% of the group III and 47% of the group IV afferents tested. Occlusion, compared with the freely perfused state, did not increase the concentrations of either hydrogen ion or lactate ion in the venous effluent from the exercising muscles. We conclude that arterial occlusion caused some unspecified substance to accumulate in the working muscles to increase the sensitivity of equal percentages of group III and IV afferents to dynamic exercise. muscular contraction; sensory nerves; decerebrate cats; ischemia
Editor: Bethesda, MD: Am Physiological Soc
Idioma: Inglês

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Effect of arterial occlusion on responses of group III and IV afferents to dynamic exercise

Adreani, Christine M ; Kaufman, Marc P

Bethesda, MD: Am Physiological Soc

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