Ola Eiken

Summary

Country: Sweden

Publications

  1. ncbi request reprint G protection: interaction of straining maneuvers and positive pressure breathing
    Ola Eiken
    Swedish Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 78:392-8. 2007
  2. pmc Blood pressure regulation V: in vivo mechanical properties of precapillary vessels as affected by long-term pressure loading and unloading
    Ola Eiken
    Department of Environmental Physiology and Swedish Aerospace Physiology Centre, KTH, Royal Institute of Technology, Berzelius v 13, Solna, 17165, Stockholm, Sweden
    Eur J Appl Physiol 114:499-509. 2014
  3. ncbi request reprint Signs and symptoms during supra-tolerance +G(z) exposures, with reference to G-garment failure
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, KTH, Royal Institute of Technology, Stockholm, Sweden
    Aviat Space Environ Med 84:196-205. 2013
  4. doi request reprint G tolerance vis-à-vis pressure-distension and pressure-flow relationships of leg arteries
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Berzelius v 13, Solna, 171 65 Stockholm, Sweden
    Eur J Appl Physiol 112:3619-27. 2012
  5. ncbi request reprint Local intravascular pressure habituation in relation to G-induced arm pain
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Solna, Sweden
    Aviat Space Environ Med 83:667-72. 2012
  6. doi request reprint Repeated exposures to moderately increased intravascular pressure increases stiffness in human arteries and arterioles
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden
    J Hypertens 29:1963-71. 2011
  7. ncbi request reprint G-protection mechanisms afforded by the anti-G suit abdominal bladder with and without pressure breathing
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden
    Aviat Space Environ Med 82:972-7. 2011
  8. ncbi request reprint Semicircular canal influence on the visually perceived eye level during gondola centrifugation
    Arne Tribukait
    Defence Research Agency, Berzelius v 13, Karolinska Institutet, SE 171 77 Stockholm, Sweden
    Aviat Space Environ Med 77:500-8. 2006
  9. doi request reprint Increased distensibility in dependent veins following prolonged bedrest
    Roger Kolegard
    Swedish Defence Research Agency, Karolinska Institute, Berzelius v 13, 171 77 Stockholm, Sweden
    Eur J Appl Physiol 106:547-54. 2009
  10. doi request reprint Antegrade pulsatile arterial-like flow in human limb veins at increased intravascular pressure
    Roger Kolegard
    Swedish Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    Clin Physiol Funct Imaging 29:209-15. 2009

Detail Information

Publications35

  1. ncbi request reprint G protection: interaction of straining maneuvers and positive pressure breathing
    Ola Eiken
    Swedish Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 78:392-8. 2007
    ..The purpose was to study (1) the interaction of pressure breathing and AGSM while wearing an anti-G suit; and (2) the G-protective properties of the anti-G suit alone and in combination with the pressure-breathing system...
  2. pmc Blood pressure regulation V: in vivo mechanical properties of precapillary vessels as affected by long-term pressure loading and unloading
    Ola Eiken
    Department of Environmental Physiology and Swedish Aerospace Physiology Centre, KTH, Royal Institute of Technology, Berzelius v 13, Solna, 17165, Stockholm, Sweden
    Eur J Appl Physiol 114:499-509. 2014
    ..That increased intravascular pressure leads to increased arteriolar wall stiffness also supports the notion that local pressure loading may constitute a prime mover in the development of vascular changes in hypertension...
  3. ncbi request reprint Signs and symptoms during supra-tolerance +G(z) exposures, with reference to G-garment failure
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, KTH, Royal Institute of Technology, Stockholm, Sweden
    Aviat Space Environ Med 84:196-205. 2013
    ....
  4. doi request reprint G tolerance vis-à-vis pressure-distension and pressure-flow relationships of leg arteries
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Berzelius v 13, Solna, 171 65 Stockholm, Sweden
    Eur J Appl Physiol 112:3619-27. 2012
    ..02). Thus, the wall stiffness of precapillary leg vessels is greater in individuals with high relaxed G tolerance; whether a causal relationship exists remains to be established...
  5. ncbi request reprint Local intravascular pressure habituation in relation to G-induced arm pain
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Solna, Sweden
    Aviat Space Environ Med 83:667-72. 2012
    ..The aim was to investigate whether vascular pressure habituation (PH) is as efficient in alleviating G-induced arm pain as using counterpressure/support garments...
  6. doi request reprint Repeated exposures to moderately increased intravascular pressure increases stiffness in human arteries and arterioles
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden
    J Hypertens 29:1963-71. 2011
    ..The aim was to investigate whether repeated exposures to moderate pressure elevations in the blood vessels of the arms (pressure training) affect pressure distension in arteries/arterioles of healthy individuals...
  7. ncbi request reprint G-protection mechanisms afforded by the anti-G suit abdominal bladder with and without pressure breathing
    Ola Eiken
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden
    Aviat Space Environ Med 82:972-7. 2011
    ..The study examined whether the abdominal bladder might provide G protection also via other mechanisms...
  8. ncbi request reprint Semicircular canal influence on the visually perceived eye level during gondola centrifugation
    Arne Tribukait
    Defence Research Agency, Berzelius v 13, Karolinska Institutet, SE 171 77 Stockholm, Sweden
    Aviat Space Environ Med 77:500-8. 2006
    ..This so-called "G-excess illusion" is generally ascribed to the otolith organs. The present study aimed at elucidating how stimulation of the semicircular canals may influence the development of the G-excess illusion...
  9. doi request reprint Increased distensibility in dependent veins following prolonged bedrest
    Roger Kolegard
    Swedish Defence Research Agency, Karolinska Institute, Berzelius v 13, 171 77 Stockholm, Sweden
    Eur J Appl Physiol 106:547-54. 2009
    ..05) pressure distension by 36% from 14 +/- 5% before to 19 +/- 5% after bedrest. Thus, removal of the gravity-dependent pressure components that act along the blood vessels in erect posture increases the distensibility of dependent veins...
  10. doi request reprint Antegrade pulsatile arterial-like flow in human limb veins at increased intravascular pressure
    Roger Kolegard
    Swedish Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    Clin Physiol Funct Imaging 29:209-15. 2009
    ..The purpose was to study the effects of moderately to markedly increased local intravascular pressures on the flow characteristics in human limb veins...
  11. doi request reprint Effects of motion sickness on thermoregulatory responses in a thermoneutral air environment
    Gerard Nobel
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Berzelius v 13, 171 65 Solna, Sweden
    Eur J Appl Physiol 112:1717-23. 2012
    ..It thus appears that also in a thermoneutral air environment MS may substantially affect thermal balance...
  12. ncbi request reprint The perception of roll tilt in pilots during a simulated coordinated turn in a gondola centrifuge
    Arne Tribukait
    Department of Environmental Physiology, Royal Institute of Technology, KTH, School for Technology and Health, Solna, Sweden
    Aviat Space Environ Med 82:523-30. 2011
    ..The aim of the present work was to elucidate the significance of flight experience for roll tilt perception based on vestibular information...
  13. ncbi request reprint Variability in perceived tilt during a roll plane canal-otolith conflict in a gondola centrifuge
    Arne Tribukait
    Department of Environmental Physiology, Royal Institute of Technology, KTH, School of Technology and Health, Solna, Sweden
    Aviat Space Environ Med 84:1131-9. 2013
    ..We also wanted to establish whether there are any habituation or learning effects of the centrifuge test...
  14. ncbi request reprint Use of an adjustable hand plate in studying the perceived horizontal plane during simulated flight
    Arne Tribukait
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, KTH, Solna, Sweden
    Aviat Space Environ Med 84:739-45. 2013
    ..In this study a manual indicator was used for recording the subjective horizontal plane during simulated flight...
  15. ncbi request reprint Visual flow scene effects on the somatogravic illusion in non-pilots
    Lars Eriksson
    Swedish Defence Research Agency, FOI, Linköping Stockholm, Sweden, and Uppsala University, Uppsala, Sweden
    Aviat Space Environ Med 79:860-6. 2008
    ..Could visual-flow scenes that accommodate compensatory head movement reduce the SGI in naive subjects?..
  16. doi request reprint Distensibility in human veins as affected by 5 weeks of repeated elevations of local transmural pressure
    Roger Kolegard
    Department of Environmental Physiology, School of Technology and Health, KTH, Royal Institute of Technology, Berzelius v 13, Solna, 171 65 Stockholm, Sweden
    Eur J Appl Physiol 111:3119-25. 2011
    ..The results support the concept that the distensibility of venous walls adapts to meet the demands imposed by the prevailing local transmural pressures...
  17. ncbi request reprint Flight experience and the perception of pitch angular displacements in a gondola centrifuge
    Arne Tribukait
    Department of Environmental Physiology, Royal Institute of Technology, KTH, School for Technology and Health, Berzelius väg 13, SE 171 65 Solna, Sweden
    Aviat Space Environ Med 83:496-503. 2012
    ....
  18. ncbi request reprint Roll-tilt perception during gondola centrifugation: influence of steady-state acceleration (G) level
    Arne Tribukait
    Swedish Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 77:695-703. 2006
    ....
  19. ncbi request reprint Motion sickness decreases arterial pressure and therefore acceleration tolerance
    Ola Eiken
    Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 76:541-6. 2005
    ..Since motion sickness may affect autonomic nervous functions including cardiovascular control, it was hypothesized that it might interfere with cardiovascular responses to high +Gz, thereby decreasing G tolerance...
  20. ncbi request reprint G tolerance and pulmonary effects of removing chest counterpressure during pressure breathing
    Mikael Gronkvist
    Swedish Defence Research Agency, Defence Medicine, Linköping and Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 76:833-40. 2005
    ..To optimize G protection and prevent over-distention of the lungs, increased airway pressure is balanced by applying a counterpressure to the chest. The aim was to investigate the efficacy of chest counterpressure...
  21. ncbi request reprint On the role of otoliths and semicircular canals in spatial orientation: Dynamics of the visually perceived eye level during gondola centrifugation
    Arne Tribukait
    Karolinska Institute and Swedish Defense Research Agency, Stockholm, Sweden
    Percept Psychophys 67:1242-51. 2005
    ..The findings are discussed, taking into consideration otolith-semicircular-canal interaction, as well as memory functions of the vestibular system...
  22. ncbi request reprint Visual sensations of roll rotation during complex vestibular stimulation
    Arne Tribukait
    Swedish Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 79:479-87. 2008
    ..For instance, is it possible to induce sensations of tilt by rotary stimuli? The present study concerns the relationship between sensations of rotation and tilt during complex vestibular stimulation...
  23. doi request reprint Histaminergic and cholinergic neuron systems in the impairment of human thermoregulation during motion sickness
    Gerard Nobel
    Department of Environmental Physiology, Royal Institute of Technology, School for Technology and Health, Berzelius v 13, SE 171 65 Stockholm, Sweden
    Brain Res Bull 82:193-200. 2010
    ....
  24. ncbi request reprint Motion sickness increases the risk of accidental hypothermia
    Gerard Nobel
    Swedish Defence Research Agency, Berzelius v 13, Karolinska Institutet, Stockholm, Sweden
    Eur J Appl Physiol 98:48-55. 2006
    ..01 and P < 0.001, respectively) by MS. Thus, MS may predispose individuals to hypothermia by enhancing heat loss and attenuating heat production. This might have significant implications for survival in maritime accidents...
  25. pmc Acute effects of normobaric hypoxia on hand-temperature responses during and after local cold stress
    Michail E Keramidas
    1 Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden
    High Alt Med Biol 15:183-91. 2014
    Abstract Keramidas, Michail E, Roger Kölegård, Igor B. Mekjavic, and Ola Eiken. Acute effects of normobaric hypoxia on hand-temperature responses during and after local cold stress. High Alt Med Biol. 15:183-191, 2014...
  26. ncbi request reprint Semicircular canal contribution to the perception of roll tilt during gondola centrifugation
    Arne Tribukait
    Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    Aviat Space Environ Med 76:940-6. 2005
    ..The present study aimed at elucidating what kind of semicircular canal information might cause tilts of the subjective horizontal during gondola centrifugation...
  27. ncbi request reprint Changes in the perceived head transversal plane and the subjective visual horizontal induced by Coriolis stimulation during gondola centrifugation
    Arne Tribukait
    Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    J Vestib Res 16:105-16. 2006
    ..Further, the canal stimulus may induce a tilt of the fundamental egocentric frame of reference...
  28. doi request reprint Prolonged physical inactivity leads to a drop in toe skin temperature during local cold stress
    Michail E Keramidas
    a Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Berzelius väg 13, SE 171 65, Stockholm, Sweden
    Appl Physiol Nutr Metab 39:369-74. 2014
    ..05). Present findings suggest that severe physical inactivity exaggerates the drop in toe skin temperature during local cold stress, and thus might constitute a potential risk factor for local cold injury. ..
  29. doi request reprint Effects of physical fitness on relaxed G-tolerance and the exercise pressor response
    Roger Kolegard
    Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, KTH, Berzelius v 13, S 17 65, Stockholm, Sweden
    Eur J Appl Physiol 113:2749-59. 2013
    ..However, it seems that the response is blunted by endurance training rather than enhanced by strength training...
  30. ncbi request reprint Hip, thigh and calf muscle atrophy and bone loss after 5-week bedrest inactivity
    Hans E Berg
    Department of Orthopedics, Karolinska University Hospital Huddinge, Stockholm, Sweden
    Eur J Appl Physiol 99:283-9. 2007
    ..Our results also demonstrate that a decreased RD, indicating bone mineral loss, can be shown already after 5 weeks of unloaded bedrest, using a standard CT technique...
  31. doi request reprint Heterogeneous sensitivity of cerebral and muscle tissues to acute normobaric hyperoxia at rest
    Michail E Keramidas
    Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia
    Microvasc Res 84:205-10. 2012
    ..Namely, the frontal cortex seems to be more sensitive to hyperoxia than are the skeletal muscle regions...
  32. ncbi request reprint Effects of local arteriosclerosis on carotid baroreflex sensitivity and on heart rate and arterial pressure variability in humans
    Ola Eiken
    Swedish Defence Research Agency, Karolinska Institutet, Stockholm, Sweden
    Clin Physiol Funct Imaging 26:9-14. 2006
    ..It thus appears that mild-to-moderate asymptomatic carotid arteriosclerosis does not affect carotid BRS, APV or HRV at rest...
  33. doi request reprint Moderate exercise blunts oxidative stress induced by normobaric hypoxic confinement
    Tadej Debevec
    1Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, SLOVENIA 2Center of Research and Innovation on Sports, University Claude Bernard Lyon 1, Villeurbanne, FRANCE 3Department of Environmental Physiology, School of Technology and Health, Royal Institute of Technology, Stockholm, SWEDEN and 4Faculty of Biology and Medicine, ISSUL, Institute of Sport Sciences, University of Lausanne, Lausanne, Switzerland
    Med Sci Sports Exerc 46:33-41. 2014
    ..Both acute hypoxia and physical exercise are known to increase oxidative stress. This randomized prospective trial investigated whether the addition of moderate exercise can alter oxidative stress induced by continuous hypoxic exposure...
  34. doi request reprint Long-term intermittent hyperoxic exposures do not enhance erythropoiesis
    Michail E Keramidas
    Department of Automation, Biocybernetics and Robotics, Jozef Stefan Institute, Ljubljana, Slovenia
    Eur J Clin Invest 42:260-5. 2012
    ..Accordingly, the purpose of the present study was to evaluate this theory by investigating the effect of 10 daily short-term exposures to normobaric O(2) over a 2-week period on the plasma [EPO] in healthy individuals...
  35. ncbi request reprint Perception of the head transversal plane and the subjective horizontal during gondola centrifugation
    Arne Tribukait
    Karolinska Hospital, and Defense Research Agency, Stockholm, Sweden
    Percept Psychophys 67:369-82. 2005
    ..Time constants for exponential decay of the tilt of the SVH or SVV were often 2-3 min, indicating a memory for semicircular canal information on changes in head orientation--a position-storage mechanism...