Biomech

7/16/99

 

ankle

·        Strong joint

·        Tibiotalar joint, distal tibfib joint, fibulotalar joint

·        Joint is flat to the earth

·        Oblique x-ray looks at fibulotalar joint (look at interoseous membrane)

·        AP will find fractures (malleolus)

·        Osteochondrans Desecans—looks like cartilage is going to pop off in tibiotalar joint

·        Most common injured area in sports

·        3 bands—lateral ligament (tibial calcaneous or talus)

·        purpose of the ankle—aide in walking (rocking motion)

·        normal ROM—faster you move, the less movement of ankle

·        normal wear pattern is about in the center

·        w/ankle injury—it is smaller and in inferior medial portion (not much cartilage is there)

·        osteoarthritis is rare unless chronic sprained ankle or major injury

·        forces—body weight distributions

·        normal pace is 60 strokes/minute

·        no force on heel strike

·