Leith C R Meyer

Summary

Affiliation: University of the Witwatersrand
Country: South Africa

Publications

  1. ncbi request reprint Zacopride and 8-OH-DPAT reverse opioid-induced respiratory depression and hypoxia but not catatonic immobilization in goats
    Leith C R Meyer
    Brain Function Research Unit, School of Physiology, University of the Witwatersrand, South Africa
    Am J Physiol Regul Integr Comp Physiol 290:R405-13. 2006
  2. ncbi request reprint Effects of serotonin agonists and doxapram on respiratory depression and hypoxemia in etorphine-immobilized impala (Aepyceros melampus)
    Leith C R Meyer
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, 7 York Road, Parktown, 2193, South Africa
    J Wildl Dis 46:514-24. 2010
  3. doi request reprint Body temperature, thermoregulatory behaviour and pelt characteristics of three colour morphs of springbok (Antidorcas marsupialis)
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, Johannesburg, South Africa
    Comp Biochem Physiol A Mol Integr Physiol 152:379-88. 2009
  4. doi request reprint Activity re-assignment and microclimate selection of free-living Arabian oryx: responses that could minimise the effects of climate change on homeostasis?
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, 7 York Road, Parktown 2193, South Africa
    Zoology (Jena) 115:411-6. 2012
  5. ncbi request reprint Fever and sickness behavior during an opportunistic infection in a free-living antelope, the greater kudu (Tragelaphus strepsiceros)
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, Johannesburg, South Africa
    Am J Physiol Regul Integr Comp Physiol 294:R246-54. 2008
  6. doi request reprint Selective brain cooling in Arabian oryx (Oryx leucoryx): a physiological mechanism for coping with aridity?
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, 7 York Road, Parktown 2193, South Africa
    J Exp Biol 215:3917-24. 2012
  7. ncbi request reprint Hyperthermia in captured impala (Aepyceros melampus): a fright not flight response
    Leith C R Meyer
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, 7 York Road, Parktown 2193, South Africa
    J Wildl Dis 44:404-16. 2008
  8. doi request reprint Angularis oculi vein blood flow modulates the magnitude but not the control of selective brain cooling in sheep
    Andrea Fuller
    School of Physiology, University of the Witwatersrand Medical School, Parktown, South Africa
    Am J Physiol Regul Integr Comp Physiol 300:R1409-17. 2011
  9. doi request reprint Cheetah do not abandon hunts because they overheat
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand Medical School, 7 York Road, Parktown 2193, South Africa
    Biol Lett 9:20130472. 2013
  10. doi request reprint Body temperature and physical activity correlates of the menstrual cycle in Chacma Baboons (Papio hamadryas ursinus)
    Trevor T Nyakudya
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, Parktown, Johannesburg, South Africa
    Am J Primatol 74:1143-53. 2012

Detail Information

Publications12

  1. ncbi request reprint Zacopride and 8-OH-DPAT reverse opioid-induced respiratory depression and hypoxia but not catatonic immobilization in goats
    Leith C R Meyer
    Brain Function Research Unit, School of Physiology, University of the Witwatersrand, South Africa
    Am J Physiol Regul Integr Comp Physiol 290:R405-13. 2006
    ..We conclude that serotonergic drugs that act on 5-HT1A, 5-HT7, and 5-HT4 receptors reverse opioid-induced respiratory depression and hypoxia without reversing catatonic immobilization...
  2. ncbi request reprint Effects of serotonin agonists and doxapram on respiratory depression and hypoxemia in etorphine-immobilized impala (Aepyceros melampus)
    Leith C R Meyer
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, 7 York Road, Parktown, 2193, South Africa
    J Wildl Dis 46:514-24. 2010
    ..05), indicating improved oxygen diffusion. Metoclopramide and buspirone transiently improved blood oxygenation of opioid-immobilized impala, probably by improving ventilation-perfusion ratios, without reversing catatonic immobilization...
  3. doi request reprint Body temperature, thermoregulatory behaviour and pelt characteristics of three colour morphs of springbok (Antidorcas marsupialis)
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, Johannesburg, South Africa
    Comp Biochem Physiol A Mol Integr Physiol 152:379-88. 2009
    ..White springbok, by contrast, were more protected from solar heat load, but potentially less able to meet the energy cost of homeothermy in winter. Thus energy considerations may underlie the rarity of the springbok colour morphs...
  4. doi request reprint Activity re-assignment and microclimate selection of free-living Arabian oryx: responses that could minimise the effects of climate change on homeostasis?
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, 7 York Road, Parktown 2193, South Africa
    Zoology (Jena) 115:411-6. 2012
    ..Such flexible behavioural processes may act to buffer the adverse effects of the progressively hotter and drier conditions predicted to occur with climate change...
  5. ncbi request reprint Fever and sickness behavior during an opportunistic infection in a free-living antelope, the greater kudu (Tragelaphus strepsiceros)
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, Johannesburg, South Africa
    Am J Physiol Regul Integr Comp Physiol 294:R246-54. 2008
    ..46, P = 0.014). We therefore have recorded quantitative evidence for autonomic and behavioral fever, as well as sickness behavior, in the form of decreased activity, in a free-living ungulate species...
  6. doi request reprint Selective brain cooling in Arabian oryx (Oryx leucoryx): a physiological mechanism for coping with aridity?
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, 7 York Road, Parktown 2193, South Africa
    J Exp Biol 215:3917-24. 2012
    ..Enhanced selective brain cooling in Arabian oryx supports the hypothesis that selective brain cooling would bestow survival advantages for artiodactyl species inhabiting hot hyper-arid environments...
  7. ncbi request reprint Hyperthermia in captured impala (Aepyceros melampus): a fright not flight response
    Leith C R Meyer
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, 7 York Road, Parktown 2193, South Africa
    J Wildl Dis 44:404-16. 2008
    ..Therefore we believe that capture-induced hyperthermia in impala is caused predominantly by stress, which induces a rapid rise in body temperature...
  8. doi request reprint Angularis oculi vein blood flow modulates the magnitude but not the control of selective brain cooling in sheep
    Andrea Fuller
    School of Physiology, University of the Witwatersrand Medical School, Parktown, South Africa
    Am J Physiol Regul Integr Comp Physiol 300:R1409-17. 2011
    ..We conclude that the AOV is not the only conduit for venous drainage contributing to SBC in sheep and that, contrary to widely held opinion, control of SBC does not involve changes in the vasomotor state of the AOV...
  9. doi request reprint Cheetah do not abandon hunts because they overheat
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand Medical School, 7 York Road, Parktown 2193, South Africa
    Biol Lett 9:20130472. 2013
    ..5°C ± 0.1°C), even though the level of activity during the hunts was similar. We propose that the increase in body temperature following a successful hunt is a stress hyperthermia, rather than an exercise-induced hyperthermia. ..
  10. doi request reprint Body temperature and physical activity correlates of the menstrual cycle in Chacma Baboons (Papio hamadryas ursinus)
    Trevor T Nyakudya
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, Parktown, Johannesburg, South Africa
    Am J Primatol 74:1143-53. 2012
    ..8). We have characterized correlates of the menstrual cycle in baboons and shown, for the first time, a rhythm of physical activity and abdominal temperature over the menstrual cycle, with a nadir of temperature and activity at ovulation...
  11. ncbi request reprint Validation of a biotelemetric technique, using ambulatory miniature black globe thermometers, to quantify thermoregulatory behaviour in ungulates
    Robyn S Hetem
    Brain Function Research Group, School of Physiology, University of the Witwatersrand, Medical School, 7 York Road, Parktown, South Africa
    J Exp Zool A Ecol Genet Physiol 307:342-56. 2007
    ..We, therefore, have developed an ambulatory device, which can be attached to free-ranging animals, to remotely quantify thermoregulatory behaviour and selected microclimates...
  12. ncbi request reprint Dehydration increases the magnitude of selective brain cooling independently of core temperature in sheep
    Andrea Fuller
    School of Physiology, University of the Witwatersrand Medical School, 7 York Road, Parktown 2193, South Africa
    Am J Physiol Regul Integr Comp Physiol 293:R438-46. 2007
    ..We conclude that for any given carotid blood temperature, dehydrated sheep exposed to heat exhibit selective brain cooling up to threefold greater than that when euhydrated...