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Rotational Head Acceleration

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Overview

A seminal paper in the field of head injury biomechanics demonstrated that rotational motion of the head was the main cause of strain to the brain [1]. Though in the real world it is nearly impossible for the human head to experience purely rotational motion without linear motion, rotational acceleration is used as a correlative metric to understand brain deformation.

Outputs Example

Panel Descriptions
3D Representation of Sensor Location and Local Coordinate System Used for ProcessingSummary Tables with peak rotational acceleration values, and corresponding times
Time history of rotational acceleration plotted by direction.

Instrumentation Summary

Sensor TypeNodout
Sensor IDDefault: Node ID 1990002
Local Coordinate SystemDefault: LCS ID 1000002
Signal TypeRotational Acceleration Time History
Filter FrequencyDefault: 1000 Hz

Calculation Methods

1. Extract X, Y, and Z rotational head acceleration traces from the sensor node.  Default node ID can be modified in Human Body Model Settings.

2. Filter each trace individually.  Note: default filter frequency can be modified in Calculation Settings.

References

[1] Holbourn, A. H. S. “Mechanics of head injuries.” The Lancet 242.6267 (1943): 438-441.