Re: valgus knee

Marc Verhaegen:
> http://moon.ouhsc.edu/dthompso/gait/knmatics/detgen.htm
>
>> Pretty well everything on that page is incorrect. It assumes that the
>> centre of gravity (CG in engineering parlance) is over the foot during
>> walking, which is rarely the case (I mean that it is never the case in a
>> normal straight walk, but some individuals may walk abnormally, e.g. with
>> both feet centred on the same straight line). The CG needs to be over
>> the foot only when the body is in stationary equilibrium, standing on one
>> leg. During walking and running, the body is not in equilibrium. Your
>> previous reference shows that the normal straight leg has the line
>> between hip joint and ankle passing through the knee joint. Genu valgus
>> is the geometry that achieves that, despite the bent shape of the
>> femur. --Ken
>
> Yes, hip-knee-ankle on 1 line seems to be an excellent indicator of
> habitual bipedality (since in bipedality the body is often supported by
> only 1 leg).
> - Why does Hs have a femoral neck? for better/stronger abduction?
> - Why did He & Lucy have rel.longer & horizontal femoral necks than Hs?
> - Did the hip-ankle line pass through the knee in He? in Lucy? I thought
> not, but I'm not sure at all. --Marc

A cliff hanger is very often on only one leg. And even more, he is
bearing all his weight on that one leg. On a big toe. Humans are perfectly
adapted just for that (as far as I can tell). -- Mario


.

Relevant Pages

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