Tensor Fascia Latae (TFL) | Clinical Anatomy & Physiology

The video tutorial covers the tensor fascia lata (TfL) muscle, its anatomy, origin, insertion, actions, innervation, and blood supply. It highlights the clinical relevance of the TfL, particularly in relation to IT band syndrome, emphasizing the importance of targeting the muscle for effective treatment. The tutorial also explains the mechanics of running and the role of the TfL in hip and knee stabilization.

Where does the tensor fascia lata muscle primarily originate?

• Posterior iliac crest

• Anterior superior iliac spine

• Greater trochanter of the femur

• Lesser trochanter of the femur

What is the primary action of the tensor fascia lata at the hip joint?

• External rotation

• Extension

• Flexion

• Internal rotation

Which nerve innervates the tensor fascia lata?

• Femoral nerve

• Inferior gluteal nerve

• Sciatic nerve

• Superior gluteal nerve

What is a common symptom of IT band syndrome?

• Pain at the posterior hip

• Pain at the anterior hip

• Pain at the lateral knee

• Pain at the medial knee

Why is it ineffective to target the IT band directly for treatment?

• The IT band does not affect knee movement

• The IT band is too deep to reach

• The IT band is not the source of pain

• The IT band is not connected to the TfL

Which test is used to evaluate IT band syndrome?

• Thomas test

• Ober's test

• Trendelenburg test

• Noble compression test

What happens to the TfL when the gluteus medius and minimus are weak?

• It stops functioning

• It becomes less active

• It provides more stabilization

• It lengthens and relaxes