Gait. RLA - Gait Phases Traditional Phases of Gait Stance Phase (60%) ï‚· Heel-strike (contact) ï‚· Foot-flat ï‚· Mid-stance point ï‚· Heel-off ï‚· Toe-off

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Text of Gait. RLA - Gait Phases Traditional Phases of Gait Stance Phase (60%) ï‚·...

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  • Gait
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  • RLA - Gait Phases
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  • Traditional Phases of Gait Stance Phase (60%) Heel-strike (contact) Foot-flat Mid-stance point Heel-off Toe-off
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  • Traditional Phases of Gait Swing Phase (40%) Acceleration: TO Acceleration Midswing: Acceleration MSw Deceleration MSw Deceleration
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  • Ranchos Los Amigos (RLA) zTraditional references Reference Limb only zRLA references both limbs zRLA defines swing intervals more precisely
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  • RLA Stance Phase 60% of Gait Cycle zLoading Response (LR) 0 - 10% [DS] zMidstance (MSt) 10 - 30% zTerminal Stance (TSt) 30-50% zPreswing (PSw) 50-60% [DS]
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  • Instantaneous Events zInitial Contact (IC) zToe-off (TO)
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  • RLA Swing Phase 40% of Gait Cycle zInitial Swing (Isw) 60 - 73% zMidswing (MSw) 73 - 87% zTerminal Swing (TSw) 87 - 100%
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  • Gait Phases
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  • RLA Locomotor Unit zPelvis zLE Passenger Unit zHAT
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  • Locomotor Functions Propulsion Stability Shock Absorption Energy Conservation z< 2 displacement
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  • Task A: Weight Acceptance IC LR zIC opposite foot lifted (end of DS) z0 - 10%
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  • Task B: Single Limb Support MSt (initiation of SLS) zopposite foot lifted BW over forefoot z10 - 30% TSt (completes SLS) zHeel rise of RL IC of opposite limb z30 - 50%
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  • Task C: Limb Advancement (Stance) PSw (initiation of second phase of DS) zIC of opposite limb ipsilateral toe-off z50 - 60%
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  • Task C: Limb Advancement (Swing) ISw zToe-off swing foot is opposite stance limb MSw zSwing limb opposite stance limb swing limb tibia is vertical
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  • Task C: Limb Advancement (Swing) TSw zvertical tibia IC
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  • GRFV or Body Vector Effect of body weight HAT COG COP Relate GRFV to joint centers to determine: zmagnitude and direction of joint instability
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  • GRFV HAT COG (T10) COP GRFV
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  • Moment External Internal
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  • Ankle ROM
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  • Ankle Moment
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  • Knee ROM
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  • Knee Moment
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  • Hip ROM
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  • Hip Moment
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  • Rockers Heel Ankle Forefoot