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External rotation (or extorsion or lateral rotation) is an anatomical term of motion referring to rotation away from the center of the body. The external rotator muscles include: Muscles
Angular motions (or rotary motions) occur when an object is around another object increasing or decreasing the angle. The different parts of the object do not move the same distance. Examples include a movement of the knee, where the lower leg changes angle compared to the femur, or movements of the ankle. [2]
Peroneus longus and peroneus brevis (centre left), the primary muscles involved in eversion Tibialis anterior and posterior (centre top), the primary muscles involved in inversion Dorsiflexion of the foot: The muscles involved include those of the Anterior compartment of leg , specifically tibialis anterior muscle , extensor hallucis longus ...
In anatomy, flexor is a muscle that contracts to perform flexion (from the Latin verb flectere, to bend), [1] a movement that decreases the angle between the bones converging at a joint. For example, one's elbow joint flexes when one brings their hand closer to the shoulder , thus decreasing the angle between the upper arm and the forearm .
A muscle that fixes or holds a bone so that the agonist can carry out the intended movement is said to have a neutralizing action. A good famous example of this are the hamstrings; the semitendinosus and semimembranosus muscles perform knee flexion and knee internal rotation whereas the biceps femoris carries out knee flexion and knee external ...
Rotate through center and to the right as you bend right knee and extend left leg toward the floor. Make sure to lift up and over to get shoulder off the floor. Continue alternating.
Muscle Location Origin Insertion Artery Nerve Action Antagonist O TA occipitalis: head, occipitofrontalis, back of skull (left/right) superior nuchal line of occipital bone, mastoid part of temporal bone
There is sometimes an additional head from the sesamoid bone in the lateral (outer) head of the gastrocnemius muscle. Rarely an additional inconstant muscle; the popliteus minor is seen. It originates from the femur on the inner side of the plantaris muscle and inserts into the posterior ligament of the knee-joint. Peroneotibialis, 14% of ...