PHTY302 Lecture 9: Week 9
Document Summary
Stance phase: concentric activity occurs primarily in double support: hip extensors at beginning of stance, hip flexors at end of stance, ankle plantarflexors at end of stance. Remaining activity in single support is eccentric: hip flexors, hip abductors to control lateral displacement centre of mass on stance leg, knee extensors, ankle plantarflexors. Swing phase: concentric activity: hip flexors initially, ankle dorsiflexors throughout, primarily pendular motion with. Eccentric muscle activity used to control limb segments: hip extensors mid swing, knee extensors initially and knee flexors for rest of swing. Walking outcomes after stroke: roughly 70-80% of people get back to walking post stroke, mean walking speed following stroke is 0. 53 ( 0. 22) m/s. Compared with 1. 34 ( 0. 17) m/s in age matched controls: speed considered necessary for community ambulation is > 0. 8 m/s (need to be able to walk >0. 8m/s to walk safely in the community.