[Muscular absorption of low frequency resonance in animal experiments (author's transl)].
For the further clarification of helicopter pilot's spinal troubles caused by vibration the muscular absorption was examined with the help of animal experiments. On a swinging-table acceleration values were measured in Pirbright cavies; at first this was done under a defence reaction of the muscles, and in second experiment under maximum muscular relaxation. In the tense animal the resonance occurring at 5 Hz was almost completely absorbed, whereas in the relaxed animal a clear resonance--curve could be developed at 5 Hz. On the other hand vibration at a higher frequency up to 15 Hz were to an increasing extent better absorbed in the relaxed animal than in animal with a muscular defence reaction. For this reason the protective function of a not fatigued musculature for the defence of especially badly tolerated resonance vibrations is being discussed.
D000818:Animals; D003643:Death; D006168:Guinea Pigs; D008297:Male; D008433:Mathematics; D009132:Muscles / Q000503:physiopathology*; D014732:Vibration; D014851:Wakefulness
Die muskuläre Dämpfung niederfrequenter Schwingungen im Tierversuch