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Physiology & Medicine / mulitjoint muscle fibres
« on: 13/05/2005 19:04:00 »
The rectus femoris is the only quadricep muscle that crosses two joints. It is responsible for flexion on the hip and extension of the knee. How is it possible for me to flex my hip using the rectus femoris without extending my knee as all muscle fibres stretch the entire length of the muscle and contract across its whole length or not at all?
I understand that the hip flexor muscles are also working during flexion of the hip but the rectus femoris is also working so how is this possible.
I have been puzzeled by this for a while now and have also had difficluty getting a definitive explaination for 'Lomards parodox'. Can anyone shed any light on this for me ?
I understand that the hip flexor muscles are also working during flexion of the hip but the rectus femoris is also working so how is this possible.
I have been puzzeled by this for a while now and have also had difficluty getting a definitive explaination for 'Lomards parodox'. Can anyone shed any light on this for me ?