Mechanism for control of head and neck dynamic response.

A modeling effort has been undertaken to determine the cause of atypical responses of the head/neck anatomy of certain volunteer subjects to -X vector direction acceleration profiles. The results appear to indicate that these subjects, who had been previously run in the +Y and/or -X+Y vector directions, may have learned to exert purposeful control over their head/neck responses in order to lessen the severity of their exposures.