Center of Mass Dynamics and Slip Severity

摘要: The National Safety Council listed falls as the third ranked cause (14.6%) of unintentional deaths in general population US. It is postulated that an attempt to control COM employed prevent during perturbed gait. goal this research was gain understanding (1) relationship between dynamics at slip initiation and severity, (2) how individuals their when warned about possibility slipping (anticipatory control). body's slips may reveal insights into biomechanical reasons behind high prevalence slip-precipitated elderly. findings also be helpful differentiating postural strategies successfully recover balance responses result falls.Sixteen healthy young (20-35 yrs) 11 older (55-70 subjects were exposed unexpected (no prior knowledge floor's contaminant condition), alert (warned potential contamination), known after two baseline walking trials. Body motion from 79 VICON markers attached body sampled 120 Hz. Segmental mass generated using a segmental analysis. For slip, maintaining closer leading leg, elevated position fast medial-lateral transfers leg heel contact associated with increase severity. anticipation conditions (alert known), placement velocity geared toward continuing gait cycle. Age significant regards variables.