The hamstrings (specifically the long head of the biceps femoris, semitendonosis, and semimembranosis)
rectus femoris
hamstrings
Abductor muscle - moves a limb away from the midlineAdductor muscle - moves a limb towards the midlineExtensor muscle - increase the angle at a joint - extends a limbFlexor muscle - decreases the angle at a joint - flexes a limbPronator muscle - turns a limb to face downwardsSupinator muscle - turns a limb to face upwardsRotator muscle - rotates a limbIn the human body, these are the responsible muscles.*Muscles which move the thigh and their action*Gluteus maximus - Extends and rotates thigh laterally.Adductor longus - Adducts, medially rotates and flexes the thighAdductor brevis - Adducts, laterally rotates and flexes the thighAdductor magnus - Adducts, flexes, laterally rotates and extends the thigh.Rectus femoris - Extends knee and flexes hipVastus lateralis - Extends kneeVastus medialis - Extends kneeVastus intermedius - Extends kneeSartorius - Flexes knee. Flexes hip and rotates femur laterallyBiceps femoris - Flexes leg and extends thighSemitendinosus - Flexes leg and extends thighSemimembranosus - Flexes leg and extends thigh
The Femoral nerve. (The motor branches innervate anterior thigh muscles - quadriceps, which flex the thigh and extend the knee.)
The knee joint is an example of a body joint that opens and closes as it flexes and extends during movement.
It plantar flexes the foot at the ankle and flexes the leg at the knee.
Semitendinosus.
The knee
The general name for the group is hamstring. The technical names of the two primary muscles are semitendinosus and semimembranosus.
The long head of the bicep femoris, extends the hip, and it also, along with the short head of the bicep femoris, flexes and externally(laterally) rotates the knee.
quadricep
Gluteus-Flexes and extends the Femur.