Muscles of the Posterior Thigh

Which of the following muscles is part of the hamstring group?

What is the primary function of the biceps femoris?

Which muscle is NOT considered a part of the hamstrings?

In addition to the biceps femoris, which muscle is included in the posterior thigh?

Which muscles are primarily responsible for knee flexion?

What is the primary function of the quadriceps femoris group?

Which of the following muscles is NOT a part of the hamstring group?

Which action is primarily performed by the hamstring muscles?

How many muscles are generally classified as part of the quadriceps femoris group?

What is the common origin of the quadriceps femoris group?

Which muscle is primarily responsible for extending the leg at the knee joint?

What is the common action of the Quadriceps femoris group?

Which of the following muscles is NOT part of the hamstring group?

What is the primary action of the Semimembranosus muscle?

Which muscle works as a prime mover for both flexion of the thigh at the hip joint and extension of the leg at the knee joint?

What is the insertion point for the Quadriceps femoris?

Which of the following muscles is incorrectly paired with its action?

What is the main function of the Iliopsoas muscle group?

Biceps femoris, Semitendinosus, Semimembranosus are the main muscles in this region.
Responsible for hip extension and knee flexion.

Psoas Major:
- Origin: T12-L5 vertebrae.
- Insertion: Lesser trochanter of femur.
- Prime mover for hip flexion; assists trunk flexion.
Iliacus:
- Origin: Iliac fossa.
- Insertion: Lesser trochanter of femur.
- Also a prime mover for hip flexion.

Sartorius:
- Origin: Anterior superior iliac spine.
- Insertion: Medial and proximal aspect of tibia.
- Actions: Flexion & lateral rotation of thigh; flexion of leg at knee joint.
Quadriceps Femoris Group:
- Composed of Rectus Femoris, Vastus Lateralis, Vastus Medialis, Vastus Intermedius.
- Common origin includes the anterior inferior iliac spine (Rectus femoris).
- Insertion via Quadriceps femoris tendon to tibial tuberosity.
- Primary action: Extension of leg at knee joint; Rectus femoris also allows flexion at the knee and hip joints.

Individual muscle names are not necessary for study, focus on the group functions and relationships.

Superficial Group: Includes Gluteus Maximus, Gluteus Medius, Gluteus Minimus.
- Gluteus Maximus:
  - Origin: Gluteal surface of ilium, sacrum, and coccyx.
  - Insertion: Greater trochanter and gluteal tuberosity of femur; Iliotibial tract.
  - Prime mover for hip extension; contributes to abduction and lateral rotation.
- Gluteus Medius and Minimus:
  - Major players in hip abduction and medial rotation.

Focus on relationships among different muscle groups including anterior, medial, and posterior compartments.
Understand function and origin/insertion relationships rather than memorizing individual muscles in the medial thigh.