Medizinische Universität Graz - Research portal
Selected Publication:
Gallasch, E; Kozlovskaya, IB.
Vibrografic signs of autonomous muscle tone studied in long term space missions.
Acta Astronaut. 2001; 43(3-6): 101-106.
Doi: 10.1016/S0094-5765(98)00147-7
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- Leading authors Med Uni Graz
- Gallasch Eugen
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- Abstract:
- Signs of resting muscle tone, assessed by cardiac driven microvibrations (MV), were studied in two cosmonauts during long term space missions on the Russian MIR station. In the 1 g environment, MV showed the typical 7-13 Hz resonance oscillations triggered by the heart beat. In 0 g, these pulsations were damped and the waveform became similar to an acceleration ballistocardiogram. If resting tone was slightly increased by extending the arm in 0 g, the resonance oscillations reappeared in most cases. By means of a simple vibromechanic analog it is demonstrated that the elastic component of muscle has to be reduced during the fully relaxed state in 0g.
- Find related publications in this database (using NLM MeSH Indexing)
- Aerospace Medicine -
- Arm -
- Electrocardiography -
- Heart Rate - physiology
- Humans - physiology
- Muscle Contraction - physiology
- Muscle Relaxation - physiology
- Muscle Tonus - physiology
- Muscle, Skeletal - physiology
- Research Support, Non-U.S. Gov't - physiology
- Space Flight - physiology
- Vibration - physiology
- Weightlessness - physiology