Results 201 to 210 of about 17,476 (253)

Thermoregulatory Response to Intraoperative Head-Down Tilt

Anesthesia & Analgesia, 2002
Thermoregulation interacts with cardiovascular regulation within the central nervous system. We therefore evaluated the effects of head-down tilt on intraoperative thermal and cardiovascular regulation. Thirty-two patients undergoing lower-abdominal surgery were randomly assigned to the 1) supine, 2) 15 degrees -20 degrees head-down tilt, 3) leg-up, or
Yasufumi, Nakajima, Toshiki, Mizobe, Takashi, Matsukawa, Daniel I, Sessler, Yoshihiro, Kitamura, Yoshifumi, Tanaka   +5 more
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Spinal Effects of Head-down Tilting

Physical Therapy, 1988
The purpose of this study was to compare the effects of two methods of inversion therapy and four common exercise positions on the shape of the low back. We studied 25 healthy subjects in six exercise positions: 1) inverted with lower limbs extended (ILLE), 2) standing, 3) supine, 4) inverted with lower limbs flexed (ILLF), 5) sitting, and 6) hooklying.
Larry J. Nosse, Dennis C. Sobush, Cathy McCrimmon   +2 more
openaire   +1 more source

Effect of head-down tilt on brain water distribution

European Journal of Applied Physiology, 1999
Vascular and tissue fluid dynamics in the microgravity of space environments is commonly simulated by head-down tilt (HDT). Previous reports have indicated that intracranial pressure and extracranial vascular pressures increase during acute HDT and may cause cerebral edema. Tissue water changes within the cranium are detectable by T2 magnetic resonance
A, Caprihan, J A, Sanders, H A, Cheng, J A, Loeppky   +3 more
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Head-down tilt bed rest and immune responses

Pflügers Archiv, 2000
Head-down tilt bed rest (HDT) is used as a model for studying the physiological changes occurring in weightlessness during spaceflight. In the present study, eight volunteers were subjected to a strict HDT of -6 degrees for 42 days. Blood samples were obtained 37 and 13 days before, at days 13, 34, and 41 during, and 12, 33, and 47 days after HDT ...
D A, Schmitt, M, Schwarzenberg, J, Tkaczuk, S, Hebrard, G, Brandenberger, G, Mauco, M, Cogoli-Greuter, M, Abbal   +7 more
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Does head-down tilt simulate zero gravity?

Basic Research in Cardiology, 1984
Six anesthetized female rhesus monkeys were studied to determine the effect of head-down tilt on renal function. Head-down tilt is believed to simulate zero gravity. Some animals were tilted from 0 degree to -5 degrees or -10 degrees and others from +10 degrees to -10 degrees. None of these maneuvers consistently altered renal function.
J P, Gilmore, M N, Nemeh
openaire   +2 more sources

Neurophysiological and Cognitive Changes Induced by the Acute Head-Down Tilt

Aerospace Medicine and Human Performance
INTRODUCTION: In space, under weightlessness conditions, human brain activity is changed due to the shifting of body fluid and blood toward the cephalic region. This shifting leads to changes in cerebral hemodynamics and, consequently, neurophysiological function, which impacts mental functions like cognition ...
Monika, Sharma, Savita, Gaur, Harsh, Pawar, Neha, Yadav, Bhanuteja, Thondala, Sanjeev, Kumar, Krishna, Kishore, Koushik, Ray, Usha, Panjwani   +8 more
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INTRAOCULAR PRESSURE AND EYE HYDRODYNAMICS DURING BRIEF HEAD-DOWN TILT

Aerospace and Environmental Medicine, 2016
Intraocular pressure (IOP) and eye hydrodynamics (aqueous outflow easiness rate (C) and moisture chamber production (F)) were studied in 9 adult volunteers subjected to the hypogravity effects of head-down tilt (HDT) at -15⁰ to the horizontal plane. The volunteers stayed in the horizontal and tilted positions for 10 minutes.
E A, Guizzatullina, I G, Bryndina
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Early cardiovascular adaptation to zero gravity simulated by head-down tilt

Acta Astronautica, 1980
The early cardiovascular adaptation to zero gravity, simulated by head-down tilt at 5 degrees, was studied in a series of 10 normal young men. The validity of the model was confirmed by comparing the results with data from Apollo and Skylab flights. Tilt produced a significant central fluid shift with a transient increase in central venous pressure ...
C G, Blomqvist, J V, Nixon, R L, Johnson, J H, Mitchell   +3 more
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[Prognostic importance of the head-down tilting load].

Kosmicheskaia biologiia i aviakosmicheskaia meditsina, 1980
The prognostic significance of head-down tilt at -15 degrees and -30 degrees for 6 min at each step was assessed in 40 normal men, aged 22-39. The study of mean values of the maximal amplitude, relative duration of the anacrotic phase, dicrotic and diastolic indices of hemispheric and bimastoidal rheoencephalography as well as of health condition ...
Kh Kh, Iarullin, V A, Gornago, T D, Vasil'eva, M E, Gugushvili   +3 more
openaire   +1 more source

Directionality in cardiovascular variability interactions during head-down tilt test

2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2014
A nonlinear model-free Granger causality approach was exploited to quantify the strength of the causal relation along cardiac baroreflex and cardiopulmonary pathway from spontaneous cardiovascular variabilities during head-down tilt (HDT). The analysis was completed through the assessment of traditional time and frequency domain parameters and cardiac ...
Alberto Porta, Andrea Marchi, Vlasta Bari, Aparecida Maria Catai, Stefano Guzzetti, Ferdinando Raimondi, Riccardo Colombo   +6 more
openaire   +3 more sources