[TA] anterior portion of the space enclosed by the fascia lata, separated from the medial and lateral compartments by the medial and lateral intermuscular septa, respectively; contains the shaft of the femur and the muscles that produce flexion at hip and/or extension at the knee, innervated by the femoral nerve. SYN: compartimentum femoris anterius [TA], compartimentum femoris extensorum [TA], extensor compartment of thigh*, compartment of thigh for extensors of knee, compartment of thigh for flexors of hip.