Hip Internal Rotation Anatomy Quiz

Hip Internal Rotation

• Objectives: Students will be able to identify primary muscles involved in hip internal rotation, the range of motion, and the effects of weakness and contracture.

• Content:

  • Primary Muscles: Gluteus minimus, Tensor fascia latae
  • Accessory Muscles: Gluteus medius, Semitendinosus, Semimembranosus, superior portion of adductor magnus, adductors brevis and longus
  • Range of Motion: 45 degrees with knee flexion. Knee extension reduces amplitude.
  • Factors Limiting Motion: Iliofemoral ligament (when hip is extended), ischiocapsular ligament (when hip is flexed), and hip external rotator muscles.

Anatomy of Gluteus Minimus

• Origin: External surface of the ilium, between the anterior and inferior gluteal lines, and margin of the greater sciatic notch.
• Insertion: Anterior border of the greater trochanter of the femur and hip joint capsule.
• Nerve Supply: Superior gluteal nerve
• Action: Abducts, medially rotates and assists in flexion of the hip joint.

Anatomy of Tensor Fascia Latae

• Origin: Outer surface of anterior iliac crest, between tubercle of the iliac crest and anterior superior iliac spine.
• Insertion: Iliotibial tract into the anterior surface of lateral condyle of tibia.
• Nerve Supply: Superior gluteal nerve
• Action: Flexion, abduction, and internal rotation of the hip. Assists with gluteus maximus in maintaining knee extension in standing.

Effects of Weakness of Hip Internal Rotators

• Weakness leads to lateral rotation and abduction of the thigh.

Effects of Contracture and Shortness of Hip Internal Rotators

• Pronation of the foot and knock-knee (valgus) posture.
• Limits lateral rotation through the full range of motion.
• Prevents cross-legged sitting.

Test your knowledge on the anatomy and biomechanics of hip internal rotation. This quiz covers key muscles involved, their origins and insertions, as well as range of motion and limiting factors. Perfect for students in anatomy and physiology courses.