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A Proposed New Biomechanical Head Injury Assessment Function - the Maximum Power Index
Technical Paper
2000-01-SC16
Annotation ability available
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Language:
English
Abstract
Recently, several cases of mild traumatic brain injury to
American professional football players have been reconstructed
using instrumented Hybrid III anthropomorphic test dummies ATDs.
The translational and rotational acceleration responses of injured
and uninjured players'' heads have been documented. The
acceleration data have been processed according to all current head
injury assessment functions including the GSI, HIC and GAMBIT among
others.
A new hypothesis is propounded that the threshold for head
injury will be exceeded if the rate of change of kinetic energy of
the head exceeds some limiting value. A functional relation is
proposed, which includes all six degrees of motion and directional
sensitivity characteristics, relating the rate of change of kinetic
energy to the probability of head injury. The maximum value that
the function achieves during impact is the maximum power input to
the head and serves as an index by which the probability of head
injury can be assessed.