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The adductor magnus is a large triangular muscle that forms a dividing wall between the muscles of the inner thigh and those on the back of the thigh. It is located on the inside of the thigh. This long muscle originates from a narrow point on the pelvis bone (ischiopubic ramus), passes between the masses of the hamstring and quadriceps groups and inserts, at its wide apex, in the linea aspera and on the back of the femur. It is a powerful muscle that adducts the thigh. It is innervated by the obturator and the sciatic nerves and is supplied by the profunda femoris artery. The small, flat uppermost portion of the adductor magnus is called the adductor minimus. These muscles are innervated by the obturator nerve and supplied by branches of the femoral artery.
 Research Adductor Magnus
The articularis genus is an upper leg muscle that pulls back the bursa of the knee as the leg is extended. It is one of the quadriceps muscles and sometime considered a part of the vastus medialis. This muscle originates from the anterior portion of the femur just below the vastus medialis muscle and inserts in the tip of the patellar bursa. It is innervated by the femoral nerve.
Research Articularis Genus
The quadriceps muscle group consists of four muscles: the rectus femoris, the vastus lateralis, the vastus intermedius, and the vastus medialis. They form a large fleshy mass that covers the front and sides of the femur and work as the primary extensor of the knee.
Research Quadriceps
The rectus femoris is one of the four bellies of the quadriceps muscle group. The quadriceps muscle group consists of four muscles: the rectus femoris, the vastus lateralis, the vastus intermedius, and the vastus medialis. The rectus femoris is a large fleshy mass that originates at the back of the inferior iliac spine and covers the front and sides of the femur. It inserts in the top of the patella. This muscle is innervated by the femoral nerve and supplied by the circumflex artery. The quadricep muscles work together as the primary extensor of the knee. The rectus femoris is the only two- joint muscle in the group, crossing both the knee and the hip joint. This long, flat muscle extends the leg at the knee joint and flexes the thigh at the hip joint. When the rectus femoris is contracted, the knee joint is straightened and the lower leg is extended. When it is relaxed, the lower leg is flexed.
Research Rectus Femoris
The vastus intermedius (femoral muscle; crureas) is an extensive muscle that lies deep to all the other quadriceps bellies, adding muscular fullness under them. It originates from the anterior shaft of the femur and inserts in the tuberosity of the tibia with the tendon of the quadriceps femoris and the patellar ligaments. It is innervated by the femoral nerve and supplied by femoral circumflex artery. The quadriceps muscles consist of: the rectus femoris, the vastus lateralis, the vastus intermedius, and the vastus medialis. These muscles form a large fleshy mass that covers the front and sides of the femur. They work together as the primary extensor of the knee.
Research Vastus Intermedius
The vastus lateralis (vastus externus) muscle is the largest of the quadriceps muscles. The vastus lateralis occupies the outside of the thigh and extends partially around to the front and back of the thigh. It originates from the linea aspera and inserts in the tibial tuberosity. The vastus lateralis is innervated by the femoral nerve and supplied by the femoral artery. This muscle extends the lower leg at the knee joint and is used when rising from a squatting position.
Research Vastus Lateralis
The vastus medialis (vastus internus) is the deepest of the quadriceps muscles. The vastus medialis is a bulging teardrop form located on the inner front corner of the lower thigh. It originates from the linea aspera and narrows to a tendon to insert in the tibial tuberosity. The vastus medialis is innervated by the femoral nerve and supplied by the femoral artery. It can be divided into two portions, the vastus medialis longus, which extends the knee, and the vastus medialis oblique.
Research Vastus Medialis
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The Probert Encyclopaedia was designed, edited and programed by
Matt and Leela Probert
©1993 - 2009 The Probert Encyclopaedia
Southampton, United Kingdom
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