Human Vestibulo-ocular Response and Purposive Arm Movements During Gz Centrifuge Stimulation

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ISBN 13 :
Total Pages : 53 pages
Book Rating : 4.:/5 (933 download)

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Book Synopsis Human Vestibulo-ocular Response and Purposive Arm Movements During Gz Centrifuge Stimulation by :

Download or read book Human Vestibulo-ocular Response and Purposive Arm Movements During Gz Centrifuge Stimulation written by and published by . This book was released on 1995 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes a study that investigated the kinematics and final accuracy of human arm movements under normal and increased gravity, the latter produced by rotating subjects in a centrifuge. Subjects were presented with visual targets on a laptop computer screen located above the head and viewed through a periscope, so that the subjects could not see their arm while pointing at the visual target. Gravity levels varied between 1 and 3 gravities. Effects of gravity on final pointing accuracy were quantified by paired comparisons of responses in successive blocks of experimental sessions. Stored data from the sessions were evaluated by a program which yielded the following movement characteristics: time from movement onset to peak velocity, time from peak velocity to movement end, peak velocity, and final position. Results suggest evidence for two different perceptual illusions in hyper-gravity.

Human Vestibulo-Ocular Response During 3-Gz Centrifuge Stimulation

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ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Human Vestibulo-Ocular Response During 3-Gz Centrifuge Stimulation by :

Download or read book Human Vestibulo-Ocular Response During 3-Gz Centrifuge Stimulation written by and published by . This book was released on 1996 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vestibulo-ocular reflex (VOR) and spatial orientation perceptions were recorded in 15 subjects during a 3-Gz centrifuge run. These data were obtained to study two issues; first, to gain insight into reports of asymmetrical disorientation and disturbance during acceleration and deceleration of G-induced loss of consciousness (G-LOC) training centrifuges. Secondly, to study the effects of sustained vertical linear acceleration on the vestibular system. The centrifuge run consisted of an acceleration to 3-Gz in 19 s, sustained 3-Gz for 5 min, and a deceleration to 1 Gz in 19 s. The runs were repeated three times with the subject facing the motion, and three times with the subject's back to the motion. The VOR and spatial orientation perceptions from the eight subjects who completed all six runs were analyzed. The total VOR response during acceleration and deceleration of a centrifuge run is composed of interacting angular and linear VOR components. However, the VOR response did not correspond to reported asymmetries in pitch orientation perception between centrifuge acceleration and deceleration. During the constant velocity high G phase of a centrifuge run, a sustained up-beating ("Lz") nystagmus was observed in 14 of the 15 subjects. For the eight subjects analyzed, Lz nystagmus was shown to be an individual subject characteristic, and displayed a range of mean magnitudes from 0 to 10 deg/s at 90 s. Assuming a normal visual suppression ratio of the VOR, the magnitudes of the Lz nystagmus in our subject sample did not appear sufficient to degrade visual acuity.

Human Vestibular Response During 3 Gz Centrifuge Stimulation

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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (639 download)

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Book Synopsis Human Vestibular Response During 3 Gz Centrifuge Stimulation by : R. J. McGrath

Download or read book Human Vestibular Response During 3 Gz Centrifuge Stimulation written by R. J. McGrath and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of centrifuges in training aircrew to avoid GLOC is increasing. The purpose of this study was to record the vestibulo-ocular reflex (VOR) and subjective sensations to gain insight into reports of asymmetrical disorientation and disturbance during acceleration and deceleration of GLOC training centrifuges. Horizontal and vertical eye movements and post run sensations were recorded from 15 naive male human subjects seated head erect in a 20.5-ft radius pendulous chair centrifuge. Centrifuge profile was acceleration from 1 to 3 Gz in 19 s, 5 min of sustained 3 Gz, and deceleration to 1 Gz in 19 s. Tests were repeated up to three times with the subject facing the motion, and three times with the subject's back to the motion. Eye position was recorded in the dark using an ISCAN infrared video system. Six subjects experienced GLOC, and 1 withdrew due to unrelated sickness. Slow phase velocity (SPV) and sensations from the 8 subjects who completed all 6 runs were analyzed. Roll of the chair during acceleration and deceleration produced strong pitch, roll, and yaw sensations and eye movements attributable to vestibular Coriolis stimulation. Subjective pitch amplitude change was consistently greater during deceleration than acceleration, regardless of rotation direction. The SPV magnitude during the first run in a given direction was significantly different than the two subsequent runs. A sustained upbeating ('Lz') nystagmus (1-21 deg/ s, mean 8 deg/s at 100 s; 1-12 deg/s at 315 s) was observed in 7 of 8 subjects. VOR during centrifugation is composed of interacting transient angular and sustained linear VOR components. Sensation asymmetries are not observed in the VOR. Lz nystagmus magnitude is an individual subject characteristic. Centrifuge, Vestibulo-ocular, Lz nystagmus, Spatial Orientation.

Human Vestibular Response During 3 Gz Centrifuge Stimulation

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (639 download)

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Book Synopsis Human Vestibular Response During 3 Gz Centrifuge Stimulation by : R. J. McGrath

Download or read book Human Vestibular Response During 3 Gz Centrifuge Stimulation written by R. J. McGrath and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of centrifuges in training aircrew to avoid GLOC is increasing. The purpose of this study was to record the vestibulo-ocular reflex (VOR) and subjective sensations to gain insight into reports of asymmetrical disorientation and disturbance during acceleration and deceleration of GLOC training centrifuges. Horizontal and vertical eye movements and post run sensations were recorded from 15 naive male human subjects seated head erect in a 20.5-ft radius pendulous chair centrifuge. Centrifuge profile was acceleration from 1 to 3 Gz in 19 s, 5 min of sustained 3 Gz, and deceleration to 1 Gz in 19 s. Tests were repeated up to three times with the subject facing the motion, and three times with the subject's back to the motion. Eye position was recorded in the dark using an ISCAN infrared video system. Six subjects experienced GLOC, and 1 withdrew due to unrelated sickness. Slow phase velocity (SPV) and sensations from the 8 subjects who completed all 6 runs were analyzed. Roll of the chair during acceleration and deceleration produced strong pitch, roll, and yaw sensations and eye movements attributable to vestibular Coriolis stimulation. Subjective pitch amplitude change was consistently greater during deceleration than acceleration, regardless of rotation direction. The SPV magnitude during the first run in a given direction was significantly different than the two subsequent runs. A sustained upbeating ('Lz') nystagmus (1-21 deg/ s, mean 8 deg/s at 100 s; 1-12 deg/s at 315 s) was observed in 7 of 8 subjects. VOR during centrifugation is composed of interacting transient angular and sustained linear VOR components. Sensation asymmetries are not observed in the VOR. Lz nystagmus magnitude is an individual subject characteristic. Centrifuge, Vestibulo-ocular, Lz nystagmus, Spatial Orientation.

Human Vestibular Response During 3 Gz̳ Centrifuge Stimulation

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ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.:/5 (242 download)

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Book Synopsis Human Vestibular Response During 3 Gz̳ Centrifuge Stimulation by : Braden John McGrath

Download or read book Human Vestibular Response During 3 Gz̳ Centrifuge Stimulation written by Braden John McGrath and published by . This book was released on 1990 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The use of centrifuges in training aircrew to avoid GLOC is increasing. The purpose of this study was to record the vestibulo-ocular reflex (VOR) and subjective sensations to gain insight into reports of asymmetrical disorientation and disturbance during acceleration and deceleration of GLOC training centrifuges. Horizontal and vertical eye movements and post run sensations were recorded from 15 naive male human subjects seated head erect in a 20.5-ft radius pendulous chair centrifuge. Centrifuge profile was acceleration from 1 to 3 Gz in 19 s, 5 min of sustained 3 Gz, and deceleration to 1 Gz in 19 s. Tests were repeated up to three times with the subject facing the motion, and three times with the subject's back to the motion. Eye position was recorded in the dark using an ISCAN infrared video system. Six subjects experienced GLOC, and 1 withdrew due to unrelated sickness. Slow phase velocity (SPV) and sensations from the 8 subjects who completed all 6 runs were analyzed. Roll of the chair during acceleration and deceleration produced strong pitch, roll, and yaw sensations and eye movements attributable to vestibular Coriolis stimulation. Subjective pitch amplitude change was consistently greater during deceleration than acceleration, regardless of rotation direction. The SPV magnitude during the first run in a given direction was significantly different than the two subsequent runs. A sustained upbeating ('Lz') nystagmus (1-21 deg/ s, mean 8 deg/s at 100 s; 1-12 deg/s at 315 s) was observed in 7 of 8 subjects. VOR during centrifugation is composed of interacting transient angular and sustained linear VOR components. Sensation asymmetries are not observed in the VOR. Lz nystagmus magnitude is an individual subject characteristic. Centrifuge, Vestibulo-ocular, Lz nystagmus, Spatial Orientation ."--Stinet.

Principles of Clinical Medicine for Space Flight

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Publisher : Springer Science & Business Media
ISBN 13 : 0387681647
Total Pages : 592 pages
Book Rating : 4.3/5 (876 download)

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Book Synopsis Principles of Clinical Medicine for Space Flight by : Michael R. Barratt

Download or read book Principles of Clinical Medicine for Space Flight written by Michael R. Barratt and published by Springer Science & Business Media. This book was released on 2008-03-20 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the years, a large body of knowledge has developed regarding the ways in which space flight affects the health of the personnel involved. Now, for the first time, this clinical knowledge on how to diagnose and treat conditions that either develop during a mission or because of a mission has been compiled by Drs. Michael Barratt and Sam L. Pool of the NASA/Johnson Space Center. Complete with detailed information on the physiological and psychological affects of space flight as well as how to diagnose and treat everything from dental concerns to decompression to dermatological problems encountered, this text is a must have for all those associated with aerospace medicine.

Biomechanics of Normal and Pathological Human Articulating Joints

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Publisher : Springer Science & Business Media
ISBN 13 : 9789024731640
Total Pages : 394 pages
Book Rating : 4.7/5 (316 download)

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Book Synopsis Biomechanics of Normal and Pathological Human Articulating Joints by : N. Berme

Download or read book Biomechanics of Normal and Pathological Human Articulating Joints written by N. Berme and published by Springer Science & Business Media. This book was released on 1985-06-30 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Study Institute on Biomechanics of Normal and Pathological Human Articulating Joints, Estoril, Portugal, 20 June-1 July, 1983

Mechanisms of Migration in Fishes

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Publisher : Springer Science & Business Media
ISBN 13 : 1461327636
Total Pages : 567 pages
Book Rating : 4.4/5 (613 download)

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Book Synopsis Mechanisms of Migration in Fishes by : James D. McCleave

Download or read book Mechanisms of Migration in Fishes written by James D. McCleave and published by Springer Science & Business Media. This book was released on 2013-03-13 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: The last major synthesis of our knowledge of fish migration and the underlying transport and guidance phenomena, both physical and biological, was "Fish Migration" published 16 years ago by F.R. Harden Jones (1968). That synthesis was based largely upon what could be gleaned by classical fishery-biology techni.ques, such as tagging and recapture studies, commercial fishing statistics, and netting and trapping studies. Despite the fact that Harden Jones also provided, with a good deal of thought and speculation, a theoretical basis for studying the various aspects of fish migration and migratory orientation, progress in this field has been, with a few excepti.ons, piecemeal and more disjointed than might have been expected. Thus we welcomed the approach from the NATO Marine Sciences Programme Panel and the encouragement from F.R. Harden Jones to develop a proprosal for, and ultimately to organize, a NATO Advanced Research Institute (ARI) on mechanisms of fish migration. Substantial progress had been made with descriptive, analytical and predictive approaches to fish migration since the appearance of "Fish ~ligration." Both because of the progress and the often conflicting results of research, we felt that the time was again right and the effort justified to synthesize and to critically assess our knowledge. Our ultimate aim was to identify the gains and shortcomings and to develop testable hypotheses for the next decade or two.

The Chiropractor

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Publisher : Health Research Books
ISBN 13 : 9780787306526
Total Pages : 130 pages
Book Rating : 4.3/5 (65 download)

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Book Synopsis The Chiropractor by : D. D. Palmer

Download or read book The Chiropractor written by D. D. Palmer and published by Health Research Books. This book was released on 1994-12 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1914 Contents: the Moral & Religious Duty of a Chiropractor; Chiropractic a Science, an Art & Philosophy Thereof; Nerve Vibration; a Brief Review; Inflammation; Vertebral Luxations; Health, Disease, Life and Death; Rachitis or Rickets; Biology;.

Minimal Selfhood and the Origins of Consciousness

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Publisher : BoD – Books on Demand
ISBN 13 : 3958260780
Total Pages : 262 pages
Book Rating : 4.9/5 (582 download)

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Book Synopsis Minimal Selfhood and the Origins of Consciousness by : Rupert Glasgow

Download or read book Minimal Selfhood and the Origins of Consciousness written by Rupert Glasgow and published by BoD – Books on Demand. This book was released on 2018-07-10 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Minimal Selfhood and the Origins of Consciousness, R.D.V. Glasgow seeks to ground the logical roots of consciousness in what he has previously called the 'minimal self'. The idea is that elementary forms of consciousness are logically dependent not, as is commonly assumed, on ownership of an anatomical brain or nervous system, but on the intrinsic reflexivity that defines minimal selfhood. The aim of the book is to trace the logical pathway by which minimal selfhood gives rise to the possible appearance of consciousness. It is argued that in specific circumstances it thus makes sense to ascribe elementary consciousness to certain predatory single-celled organisms such as amoebae and dinoflagellates as well as to some of the simpler animals. Such an argument involves establishing exactly what those specific circumstances are and determining how elementary consciousness differs in nature and scope from its more complex manifestations.

SAM-TR.

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ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis SAM-TR. by :

Download or read book SAM-TR. written by and published by . This book was released on 1970-03 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Microwave Effects on DNA and Proteins

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Publisher : Springer
ISBN 13 : 3319502891
Total Pages : 305 pages
Book Rating : 4.3/5 (195 download)

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Book Synopsis Microwave Effects on DNA and Proteins by : Chris D. Geddes

Download or read book Microwave Effects on DNA and Proteins written by Chris D. Geddes and published by Springer. This book was released on 2017-03-09 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: For several years, researchers have been reporting the effects of microwave radiation/heating on both the structure and function of DNA, RNA and proteins. For the most part, favourable accelerated biological functions are observed as microwave induced heating occurs, but other not-so favourable effects are also observed, such as denaturation, fragmentation and the so called and ill-explained, non-thermal microwave effects. This volume, the first of its kind, brings researchers together from around the world to discuss their current findings and thinking on the effects of Microwaves on Biological systems, particularly DNA, RNA and proteins, in the form of contributed edited chapters.

The Who's Who of Nobel Prize Winners, 1901-2000

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Publisher : Greenwood
ISBN 13 :
Total Pages : 322 pages
Book Rating : 4.:/5 (321 download)

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Book Synopsis The Who's Who of Nobel Prize Winners, 1901-2000 by : Louise S. Sherby

Download or read book The Who's Who of Nobel Prize Winners, 1901-2000 written by Louise S. Sherby and published by Greenwood. This book was released on 2002 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Who's Who of Nobel Prize Winners is a one-stop source of detailed information on the men and women who earned the Nobel Prize during the 20th century. Organized chronologically by prize, each extensive article contains in-depth information on the laureate's life and career as well as a selected list of his or her publications and biographical resources on the individual. A concise commentary explains why the laureate received the award and summarizes the individual's other important achievements. This completely updated edition also contains a history of the prize. Four indexes distinguish this title from similar biographical references and enable researchers to search by name, education, nationality or citizenship, and religion.

The Physiology of Exercise in Spinal Cord Injury

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Publisher : Springer
ISBN 13 : 1493966642
Total Pages : 286 pages
Book Rating : 4.4/5 (939 download)

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Book Synopsis The Physiology of Exercise in Spinal Cord Injury by : J. Andrew Taylor

Download or read book The Physiology of Exercise in Spinal Cord Injury written by J. Andrew Taylor and published by Springer. This book was released on 2016-12-20 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every year, around the world, between 250,000 and 500,000 people suffer a spinal cord injury (SCI). Those with an SCI are two to five times more likely to die prematurely than people without a spinal cord injury, with worse survival rates in low- and middle-income countries. Dynamic aerobic requires integrated physiologic responses across the musculoskeletal, cardiovascular, autonomic, pulmonary, thermoregulatory, and immunologic systems. Moreover, regular aerobic exercise beneficially impacts these same systems, reducing the risk for a range of diseases and maladies. This book will present comprehensive information on the unique physiologic effects of SCI and the potential role of exercise in treating and mitigating these effects. In addition, it will incorporate work from scientists across a number of disciplines and have contributors at multiple levels of investigation and across physiologic systems. Furthermore, SCI can be considered an accelerated form of aging due to the severely restricted physical inactivity imposed, usually at an early age. Therefore, the information presented may have a broader importance to the physiology of aging as it relates to inactivity. Lastly, the need for certain levels of regular aerobic exercise to engender adaptations beneficial to health is not altered by the burden of an SCI. Indeed, the amounts of exercise necessary may be even greater than the able-bodied due to ‘passive’ ambulation. This book will also address the potential health benefits for those with an SCI that can be realized if a sufficient exercise stimulus is provided.

Principles and Practice of Interventional Pulmonology

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Publisher : Springer Science & Business Media
ISBN 13 : 1461442923
Total Pages : 731 pages
Book Rating : 4.4/5 (614 download)

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Book Synopsis Principles and Practice of Interventional Pulmonology by : Armin Ernst

Download or read book Principles and Practice of Interventional Pulmonology written by Armin Ernst and published by Springer Science & Business Media. This book was released on 2012-12-02 with total page 731 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles and Practice of Interventional Pulmonology provides a comprehensive text covering all aspects of Interventional Pulmonology. Providing both pathophysiologic background as well as illustrated and clear instruction on how procedures ought to be performed, this text will be of great value to interventional pulmonologists, thoracic surgeons, surgical oncologists, and interventional radiologists.

Virgin Galactic

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Publisher : Springer
ISBN 13 : 3319092626
Total Pages : 219 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Virgin Galactic by : Erik Seedhouse

Download or read book Virgin Galactic written by Erik Seedhouse and published by Springer. This book was released on 2015-02-23 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty years ago when Sir Richard Branson called up Boeing and asked if they had a spare 747, few would have predicted the brash entrepreneur would so radically transform the placid business of air travel. But today, Branson flies airlines on six continents, employs hundreds of jets and, in 2014, was predicting that his spaceship company – Virgin Galactic – would soon open the space frontier to commercial astronauts, payload specialists, scientists and space tourists. With more than 600 seats sold at $250,000 each, what started off as a dream to send people just for the excitement to look back and marvel at Earth, was on the cusp of finally being turned into a business. Then, on October 21, 2014, tragedy struck. SpaceShipTwo was on its most ambitious test flight to date. Seconds after firing its engine, Virgin Galactic’s spaceship was breaking through the sound barrier. In just the three seconds that it took for the vehicle to climb from Mach 0.94 to Mach 1.02, co-pilot Mike Alsbury made what many close to the event believe was a fatal mistake that led to his death and the disintegration of SpaceShipTwo. Miraculously, the pilot, Peter Siebold, survived the 16-km fall back to Earth. Soon after the event Branson vowed to continue his space tourism venture in spite of this. Already a second SpaceShipTwo is being built, and ticket-holders eagerly await the day when Virgin Galactic offers quick, routine and affordable access to the edge of space. This book explains the hurdles Virgin Galactic had and still has to overcome en route to developing suborbital space travel as a profitable economic entity, and describes the missions that will be flown on board SpaceShipTwo Mk II, including high-altitude science studies, astronomy, life sciences, and microgravity physics.

Biomedical Results of Apollo

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ISBN 13 :
Total Pages : 602 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Biomedical Results of Apollo by : Richard S. Johnston

Download or read book Biomedical Results of Apollo written by Richard S. Johnston and published by . This book was released on 1975 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: