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Respiratory pattern changes during costovertebral joint movement

Respiratory pattern changes during costovertebral joint movement changes during movement College of Medicine, University of South Florida, Costovertebral joint manipulation (CVJM). Experiments were performed on 10 dogs (7-12 kg) anesthetized intravenously with diallylbarbituric acid (Dial) with urethane (0.5 ml/kg) paralyzed with gallamine triethiodide (Flaxedil) . Ventilation was artificially maintained with a respirator via a tracheal cannula end-tidal CO2 was maintained between 5 6%. Oxygen (100%) was administered via the respirator to eliminate hypoxemia due to the open chest. Rectal temperature was maintained at 37.5 t 05°C by a hot-water heating pad. costovertebral joint mechanoreceptors; phrenic nerve discharge; respiratory timing; dogs; chest compression; lung inflaArterial blood pressure was also monitored to ensure that tion deflation the animals were in a stable condition during the studies. The animals were placed in a prone position in a stereotaxic head holder spinal frame with T1 T7 IT IS WELL KNOWN that joint mechanoreceptors are im- vertebra fixed by clamps. portant for the perception of movement posture. It Routine surgical procedures included tracheal cannuis also known that passive limb movement increases the lation, catheterization of a femoral artery vein, respiratory rate that joint receptors have been shown isolation sectioning of the cervical vagus nerves, to contribute to the response (2,4, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Physiology The American Physiological Society

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