The Experts below are selected from a list of 2229 Experts worldwide ranked by ideXlab platform

A. K. Datta - One of the best experts on this subject based on the ideXlab platform.

  • MIDDLE CEREBRAL ARTERY BLOOD FLOW VELOCITY STUDIED DURING QUIET Breathing, Reflex HYPERCAPNIC Breathing AND VOLITIONALLY COPIED EUCAPNIC Breathing IN MAN Voluntary Control Of Breathing
    Advances in experimental medicine and biology, 1995
    Co-Authors: P. Peters, A. K. Datta
    Abstract:

    The cerebrovascular circulation can be assessed non-invasively in man using transcranial doppler (TCD) velocimetry (1). The change in flow velocity pulse wave is proportional to the change in blood flow in that vessel, assuming cross sectional area of the artery studied to be constant. Such changes have been shown to correlate well with changes in cerebral perfusion in response to hypercapnia (3). TCD estimates of cerebral blood flow is increased when subjects performed both physical and cognitive activities (6) or when they were presented with visual stimuli (2). This suggests that TCD is capable of detecting changes in cerebral blood flow which accompany cerebral activity. In this study we have tested the hypothesis that volitionally controlled Breathing is accompanied by an increase in middle cerebral artery (MCA) blood flow velocity (bfv) independent of changes in PCO2.

P. Peters - One of the best experts on this subject based on the ideXlab platform.

  • MIDDLE CEREBRAL ARTERY BLOOD FLOW VELOCITY STUDIED DURING QUIET Breathing, Reflex HYPERCAPNIC Breathing AND VOLITIONALLY COPIED EUCAPNIC Breathing IN MAN Voluntary Control Of Breathing
    Advances in experimental medicine and biology, 1995
    Co-Authors: P. Peters, A. K. Datta
    Abstract:

    The cerebrovascular circulation can be assessed non-invasively in man using transcranial doppler (TCD) velocimetry (1). The change in flow velocity pulse wave is proportional to the change in blood flow in that vessel, assuming cross sectional area of the artery studied to be constant. Such changes have been shown to correlate well with changes in cerebral perfusion in response to hypercapnia (3). TCD estimates of cerebral blood flow is increased when subjects performed both physical and cognitive activities (6) or when they were presented with visual stimuli (2). This suggests that TCD is capable of detecting changes in cerebral blood flow which accompany cerebral activity. In this study we have tested the hypothesis that volitionally controlled Breathing is accompanied by an increase in middle cerebral artery (MCA) blood flow velocity (bfv) independent of changes in PCO2.

Carlos M. Pais - One of the best experts on this subject based on the ideXlab platform.

  • Desarrollo de un sistema de registro para el diagnóstico temprano de la coordinación del reflejo alimentación/respiración en neonatos
    2013
    Co-Authors: Mariana E. Spuches, Gastón M. Benavidez Casal, Carlos M. Pais
    Abstract:

    Statistical surveys indicate that 10 % of Newborn in Argentina, are premature. They are assisted in Neonatal Intensive Care Units until gestational maturity. Currently the parameters for determining the maturity of the newborn are weight and gestational age. However, currently a group of studies indicate that healthy newborn come to the necessary maturity to get out the intensive care room when they acquire the feeding/Breathing Reflex, which may occur before reaching the normal values of the above parameters. If possible to determine this, the baby can get out the intensive care room in less time, which brings with it several advantages as: decreasing of the in-hospital risk, improvement in psychophysical development, make a place available in the Neonatal Intensive Care Units and lowering the health care costs, among others. By the above, we are presenting the design and development of a prototype system that records and displays simultaneously signals of sucking, swallowing and Breathing, allowing the study and diagnosis of said Reflex. Thus, the health care professional is assisted in making decisions by records that constitute a legal document.

Mariana E. Spuches - One of the best experts on this subject based on the ideXlab platform.

  • Desarrollo de un sistema de registro para el diagnóstico temprano de la coordinación del reflejo alimentación/respiración en neonatos
    2013
    Co-Authors: Mariana E. Spuches, Gastón M. Benavidez Casal, Carlos M. Pais
    Abstract:

    Statistical surveys indicate that 10 % of Newborn in Argentina, are premature. They are assisted in Neonatal Intensive Care Units until gestational maturity. Currently the parameters for determining the maturity of the newborn are weight and gestational age. However, currently a group of studies indicate that healthy newborn come to the necessary maturity to get out the intensive care room when they acquire the feeding/Breathing Reflex, which may occur before reaching the normal values of the above parameters. If possible to determine this, the baby can get out the intensive care room in less time, which brings with it several advantages as: decreasing of the in-hospital risk, improvement in psychophysical development, make a place available in the Neonatal Intensive Care Units and lowering the health care costs, among others. By the above, we are presenting the design and development of a prototype system that records and displays simultaneously signals of sucking, swallowing and Breathing, allowing the study and diagnosis of said Reflex. Thus, the health care professional is assisted in making decisions by records that constitute a legal document.

Abraham Guz - One of the best experts on this subject based on the ideXlab platform.

  • Central and Reflex neural control of genioglossus in subjects who underwent laryngectomy
    Journal of applied physiology (Bethesda Md. : 1985), 1995
    Co-Authors: J. A. Innes, Mary J. Morrell, I. Kobayashi, R.d. Hamilton, Abraham Guz
    Abstract:

    Inspiratory activation of the genioglossus (GG) may occur by central drive or as a Reflex to negative airway pressure. To distinguish between these, we studied seven laryngectomy patients who breathe via tracheal stomas. Negative pressure stimuli (-15 and -25 cmH2O for 500 ms) were applied 1) at functional residual capacity and 2) during early inspiration via (i) the upper airway (UA) and (ii) the tracheal stoma. Intraoral surface GG electromyogram was quantified, as described previously (R. L. Horner, J. A. Innes, K. Murphy, and A. Guz, J. Physiol. Lond. 436: 15-29, 1991). Phasic GG activity was also measured from an integrated electromyogram during spontaneous and inspiratory loaded Breathing. Reflex GG activation occurred with negative UA pressure both at functional residual capacity and during inspiration (P < 0.001), but pressure stimuli at the stoma caused no significant activation (P = 0.07). Phasic inspiratory activation occurred in four patients at rest and in all seven patients during inspiratory loading (P < 0.02). These patients demonstrate 1) Reflex activation of the GG by negative UA pressure without airflow or respiratory effort and 2) central inspiratory GG activation that is not mediated by negative airway pressure.