The back muscles of the thigh are three, and in other four researchers: the biceps femur with the long and short head, the semicircular and the semicircular. These muscles, in addition to the short head, extend from the hip to the lower hip thigh, where the biceps tendon is outward, the semicircular and the semicircular inward.
With respect to the biceps femoral, it exhibits two longitudinal heads in the long, which extends along with the rest of the posterior thigh muscles from the hamstring and from the adjacent femur of the hip joint and the short head from the trabecular line and from the outer superficial line. the outer median diaphragm. Above the height of the tibia, the two heads are joined in a common occipital tendon, which rests on the forearm's head.
The long head is innervated by the tibia of the sciatic nerve and the short by the perineum.
The muscle (long head) exhibits an activated extension and helps to bend the hip joint outward. The biceps tendon rests more than the other two muscles farther from the knee motion axis and thus has greater lever strength and therefore capable of protecting the knee lock to the full extent. It is therefore a dynamic knee joint stabilizer in combination with the anterior cruciate ligament that plays the role of the static joint stabilizer. h.
On the other hand, double muscle neurosis can lead to poor synchronization or an increase in the intensity of stimulation on both heads, and this may be the main reason that this muscle exhibits the highest frequency of injuries at approximately 53%.
The semi-tendon extends from the sciatic curvature and rests with a tendon on the inner rim of the tibial curvature and on the tibial fascia, contributing to the formation of the goose foot with the hip and tail.
The semicircular protrudes from the sciatic curvature and with three bundles adjoins the anterior, the vertical and the oblique, which adheres to the articular pocket of the knee joint.
Both of these muscles are innervated by the tibia of the sciatic nerve, and activators cause stretching and help inward rotation and extension of the hip joint.
Picture: During the foot-to-ground contact phase, the flexural torque of the posterior thighs of the TMUS tries to compensate for the extensor torque of the TEXT knee