Biomechanics of reactions to impending falls.
نویسندگان
چکیده
Responses of 11 young adult males, initially standing, to support surface forward accelerations of 0.18 g were investigated. In response to the impending falls this stimulus initiated, body segment motions and myoelectric activities in six muscles were measured. These measurements were then input to 9 or 12 segment whole body biomechanical models and the reaction joint torques needed to produce the motions were calculated. Mean relative joint rotations were as large as 92.8 degrees and calculated relative joint angular accelerations as large as 29.7 rad s-2. Mean myoelectric signal latencies in the six muscles monitored ranged from 135 ms at the ankles to 176 ms at the shoulders with intermediate values at intermediate joints. Mean values of calculated maximum joint torques ranged to 70 Nm at the ankles, 82 Nm at the knees, 73 Nm at the hips, and 19 Nm at the shoulders.
منابع مشابه
the effect and persistence of Otago exercise program on balance, cardiovascular endurance and lower limb strength in elderly women with a history of falls
Introduction: Impaired balance is one of the consequences of aging that causes disruption and inability to function in these people and also causes the elderly to fall. All of this increases the importance of preventing the risk of falls for the elderly. Therefore, the aim of this study was to evaluate the effect and persistence of Otago exercise program on balance, cardiovascular endurance and...
متن کاملLower extremity corrective reactions to slip events.
A significant number of injuries in the workplace is attributed to slips and falls. Biomechanical responses to actual slip events determine whether the outcome of a slip will be recovery or a fall. The goal of this study was to examine lower extremity joint moments and postural adjustments for experimental evidence of corrective strategies evoked during slipping in an attempt to prevent falling...
متن کاملExperimental study of the loss of balance process before falling from a height.
Due to a high number of accidents at work, actions have been undertaken to apply numerical simulation for reconstruction of their course in time. First works on this issue showed that the numerical human body model developed in the Central Institute for Labour Protection - National Research Institute (CIOP-PIB) should be adjusted to the nature of specific accidents. Hence, a need arose to adjus...
متن کاملPotential for Head Injuries in Infants From Low-Height Falls Laboratory Investigation
Object. Falls are the most common accident scenario in young children as well as the most common history provided in child abuse cases. Understanding the biomechanics of falls provides clinicians with objective data to aid in their diagnosis of accidental or inflicted trauma. The objective of this study was to determine impact forces and angular accelerations associated with low-height falls in...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Journal of biomechanics
دوره 21 7 شماره
صفحات -
تاریخ انتشار 1988