rectus femoris
Biaxial muscles cross two joints
Joints don't have the ability to move. Joints are where two or more bones meet. One end of muscle attaches to the bone and the other end of the muscle stretches cross the joint and attaches to the bone on the other side of the joint. Muscles work in pairs, so that when one muscle contracts (the only movement that muscle can make), the other of the pair relaxes which causes movement at the joint when the bone is pulled by the muscle.
The name of the muscle is sternocleidomastoid. As the name suggests, the muscle arise from the sternum and clavicle to reach the mastoid process. You have two muscles, one muscle on each side.
Hip and knee joints
Two or more bones are joined together at a joint. Some joints, such as the elbow or knee are movable. Other joints, such as the joints in the cranium where the cranial plates grow together, are fixed.
Your shoulder and hip are both ball and socket joints.
It crosses the ankle joint and may be subtalor joint.
Biceps Brachii crosses both the Glenohumeral and Trochleoginglymoid joints. Sartorius crosses both the hip joint and knee. Others include tensor fascia lata, rectus femoris, semimembranosus, semitendinosus, biceps femoris, flexors of the forearm cross multiple joints as do the extensors. There are many others.
A muscle that, from origin to insertion, crosses two joints, and thus can produce an action at both joints. Example: the "hamstrings" (semimembranosis and semintendinosis) cross the hip joint and the knee joint and act on both joints (extend at hip, flex at knee).
Rectus femoris
True synergy is when a muscle that crosses two joints is restricted at one joint by another muscle. There are are two types of synergy:Helping synergy is when two muscles contract simultaneously to produce one movement.True synergy is when a different muscle contracts to stop the secondary action of another muscle.
rectus fermris
The inability of a muscle that spans two or more joints to be stretched sufficiently to produce a full range of motion in all the joints simultaneously.
Expansion joints. Butt,lap,half-housed,mortise/tenon and mitre joints to name some common ones.
Joints don't have the ability to move. Joints are where two or more bones meet. One end of muscle attaches to the bone and the other end of the muscle stretches cross the joint and attaches to the bone on the other side of the joint. Muscles work in pairs, so that when one muscle contracts (the only movement that muscle can make), the other of the pair relaxes which causes movement at the joint when the bone is pulled by the muscle.
βfemorisβ refers to the femur bone on the thigh, βbicepsβ to the two origins of the muscle.
The name of the muscle is sternocleidomastoid. As the name suggests, the muscle arise from the sternum and clavicle to reach the mastoid process. You have two muscles, one muscle on each side.
The three crosses stand for the three crosses in which Jesus and the two robbers were crucified.