That is incorrect! The hamstring group extend the thigh at the hip joint!
the hamstrings :)
In the hamstrings, passive insufficiency occurs when the muscle is unable to fully elongate because the knee is extended and the hip is flexed. In the quadriceps, passive insufficiency happens when the muscle is unable to fully elongate because the knee is flexed and the hip is extended. In the gastrocnemius, passive insufficiency occurs when the muscle is unable to fully elongate because the ankle is dorsiflexed.
If you are looking for the answer of what assists all of those movements at the same time, the answer would be the Gluteus Medius and Minimus muscles. Think of a squat, while you are squatting both your hip and knee are flexed (the gluteus medius and minimus are the stabilizers/assisters during a squat), and while the hip is flexed the gluteus medius can internally rotate the thigh.
rectus femoris
The rectus femoris, as a part of the quadriceps muscle group, crosses both the hip and knee joints. During knee flexion, if the hip is also flexed, the length of the rectus femoris becomes insufficient to generate effective force because it is already elongated across both joints. This results in passive insufficiency, where the muscle cannot maintain optimal tension and ability to contract effectively, leading to a reduced capacity for knee flexion.
The two joints that the sartorius muscle crosses are the hip joint and the knee joint. The muscle originates at the anterior superior iliac spine of the hip bone and inserts at the upper medial surface of the tibia below the knee joint.
The antagonist muscle in the flexion of the knee is the quadriceps muscle group. When the knee is being flexed, the quadriceps relax to allow the hamstrings to contract and bring about the flexion movement.
The muscle that primarily adducts the hip and extends the knee is the adductor magnus. This large muscle is located in the inner thigh and plays a significant role in hip adduction, while its posterior fibers also assist in extending the knee. In addition to the adductor magnus, the quadriceps group can contribute to knee extension. However, the primary focus for both actions is the adductor magnus.
true
Function of the sartorius is flexion of the hip and knee joints. It is also called as 'Tailor's muscle'.
Sartorius and Rectus femoris
hamstring group