Human cardiovascular and vestibular responses in long minutes and low +Gz loading by a short arm centrifuge
| Autor: | Kazuyoshi Yajima, Ester Sanada, Akira Miyamoto, S. Matsumoto, T. Maeda, Y. Yamaguchi, C. Saiki, Masao Ito, Makoto Igarashi, Tatsuo Nakazato, Ruriko Maru |
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| Rok vydání: | 1994 |
| Předmět: |
Adult
Male Tachycardia Time Factors Aerospace Engineering Blood Pressure Centrifugation Hypergravity Flicker Fusion Heart Rate Humans Medicine Postural Balance Simulation Cardiovascular Deconditioning Vestibular system Centrifuge Gravity Altered business.industry Middle Aged Diaphragm (structural system) Autonomic nervous system Blood pressure Anesthesia Aerospace Medicine Vestibule Labyrinth medicine.symptom Weightlessness Countermeasures business |
| Zdroj: | Acta Astronautica. 33:239-252 |
| ISSN: | 0094-5765 |
| DOI: | 10.1016/0094-5765(94)90131-7 |
| Popis: | 1.4 G, 1.7 G, and 2.0 G of +Gz and 60 minutes centrifugation was adopted to 20 healthy male subjects using 1.8 m radius centrifuge equipped to Nihon University School of Medicine. G was applied from lower G, considering G training effect for the subjects. Effects on performance decline and side effects of such a short-arm centrifugation were especially observed in the experiments, because this size of centrifuge could be used in space station in future for a strong countermeasure of cardiovascular deconditioning, demineralization from bone, etc. G training effect was observed same as higher and rapid G acceleration in fighter pilot. Subjects suffered from many types of discomfort; such as sensation of heaviness of diaphragm, cold sweat, nausea, irritable feeling, arrhythmia, tachycardia, rapid decrease of blood pressure, which sometimes caused interruption of G load. As 2.0 G and 60 minutes centrifugation seemed very tough load to the subjects, there should be necessary some G suit or other countermeasure, if we apply a higher G and/or longer G duration. Performance decline due to the load commonly continued for 1 hour or so. Side effects were observed in relation to neuro-vestibular, cardio-vascular, and autonomic nervous system. |
| Databáze: | OpenAIRE |
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