There are two: the tibialis anterior muscle aids in inverting the ankle and dorsiflexing the foot and the peroneus longus muscles aids in everting the ankle and plantarflexing the foot.
The prime mover in ankle dorsiflexion is the tibialis anterior muscle, which is located at the front of the shin. This muscle contracts to pull the foot upward, allowing for dorsiflexion of the ankle joint.
A muscle becomes shorter when it contracts.
When a muscle contracts, it shortens in length.
A muscle that contracts shortens whereas a muscle that relaxes lengthens.
When a muscle contracts, it pulls with a force generated by the muscle fibers contracting and shortening.
When one muscle in a pair contracts the other expands.
shortens
Flexion
Flexion
Ankle dorsiflexion is when the ankle is moved back towards the body. The muscles involved in this movement is the ankle extensor.
The muscle that contracts when the leg is extended at the knee is call the gastrocnemius muscle
When the muscle contracts, the tendon pulls on the bone to create movement. The tendon is the connective tissue that attaches the muscle to the bone, so when the muscle contracts, it exerts force on the tendon, which in turn moves the bone.