Assessment of Neck Muscle Biodynamics During Impact
Abstract
An experimental effort was conducted to assess the neck muscle's biodynamic characteristics using electromyographic (EMG) data collected during a human impact study. EMG data were collected from specific neck muscles of volunteer human subjects before, during, and after the subject was exposed to a vertical impact. Data analysis consisted of the Integrated Threshold Detector method, and then using the integrated EMG to determine muscle recruitment patterns and frequency distributions. The only definite conclusion that can be made from the results of this study is that EMG data can be collected during a simulated aircraft ejection. Interpretation of these data is not fully understood; however, some trends were observed. The higher the acceleration level of the test, the higher the magnitude of the EMG rectified mean value. The linear fit of the pre-impact voluntary isometric contractions is quite good in most cases. There appears to be a greater range in the EMG rectified mean values for the trapesius muscles during the backward voluntary contractions and similarly for the sternocleidomastoid muscles during the forward voluntary contractions. Additional EMG research is required.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1993
- Accession Number
- ADA391701
Entities
People
- Chris E. Perry
- Christopher L. Taylor
- Dena M. Bonetti
- Karen R. Getschow
Organizations
- Armstrong Laboratory