Fra Wikipedia, om hvorfor katte spinder. Jeg kan godt lide tanken om de astronautdragter, der spinder som en kat: Scientists at the University of California, Davis hypothesised that a cats purr can be used as a healing mechanism to offset long periods of rest and sleep that would otherwise contribute to a loss of bone density. The vibrations and contractions of a purr work during both inhalation and exhalation show a consistent pattern and frequency around 25 Hz; these frequencies have been shown to improve bone density and promote healing in animal models and humans.[14] Dr. Lyons, one of the scientists in this study, suggests that this finding may be applicable to astronauts during extended periods in zero gravity. Bone density loss and muscle atrophy is a serious concern for astronauts during extended periods at zero gravity. During these periods musculo-skeletal systems do not experience the normal stresses of physical activity, including routine standing or sitting, which requires strength for posture control. Exposing these astronauts to sound frequencies similar to those of a cats purr could counteract the deteriorating effects of low gravity.
Posted on: Thu, 24 Apr 2014 08:44:19 +0000
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