Some Vibration Data on Primates Implanted with Accelerometers on the Upper and Lower Spine: Methodology and Results in Rhesus Monkeys.

摘要

A technique was developed to measure on a daily basis the impedance and transmissibility response in primates subjected to low frequency, sinusoidal vertical vibrations. The technique involved the surgical implantation of two accelerometers on the spinous processes of monkeys at the upper thoracic and lower lumbar levels, respectively. Four Rhesus monkeys were exposed to sinusoidal vibration from 4 to 50 Hz at 0.25 and 0.40 peak Gz acceleration levels, respectively. The impedance and transmissibility responses were linear over this narrow acceleration range, although the tendency towards non-linearity existed with all four monkeys individually or as a group. Impedance magnitude, impedance phase and transmissibility between seat and spinal accelerometers were discussed in terms of the reproducibility of the data and variability within the same animal and between animals. The various factors that could contribute to the intraindividual and interindividual variabilities as well as suggestions to establish standards in methodology were presented. The application of the impedance magnitude, phase angle and transmissibility data to interspecies scaling and validation of biodynamic models was discussed briefly. (Author)