The internervous plane in the Smith-Petersen anterior hip approach is made by the femoral nerve and superior gluteal nerve.
The anterior Smith-Petersen hip approach uses the superficial internervous plane between the sartorius (femoral nerve) and the tensor fascia latae (superior gluteal nerve). The deep plane for access to the hip joint capsule uses the same internervous plane but is between the rectus femoris (femoral nerve) and the gluteus medius (superior gluteal nerve). In this approach to the hip, one must be conscious to avoid damaging the lateral femoral cutaneous nerve.
Illustration A and B show the superficial and deep internervous plane.
Barrack RL, Booth RE Jr, Lonner JH, et al (eds): Orthopaedic Knowledge Update: Hip and Knee Reconstruction 3. Rosemont, IL, American Academy of Orthopaedic Surgeons, 2006, pp 311-321
Hoppenfeld S, deBoer P: Surgical Exposures in Orthopaedics: The Anatomic Approach, ed 2. Philadelphia, PA, Lippincott Williams & Wilkins, 1994, pp 325-335