Table 1.

Sites of Entrapment, Keys Signs and/or Symptoms with Nerves in the Anterior and Posterior Hip Region

Posterior Nerve Entrapments
Involved Nerve	Common Site of Entrapment	Key Signs and/or Symptoms
Sciatic	Priformis and obturator internus/gemelli complex Proximal hamstring Lesser trochanter and Ischium	Positive seated piriformis stretch and/or active piriformis tests Ischial tenderness Pain in the posterior thigh to the popliteal fossa aggravated with running Positive ischial femoral impingement test
Pudendal	Ischial spine, sacrospinous ligament, and lesser sciatic notch entrance Greater sciatic notch and piriformis Alcock's canal and obturator internus	Pain medial to ischium Sciatic notch tenderness and piriformis muscle spasm and tenderness Obturator internus spasm and tenderness

Anterior Nerve Entrapments
Obturator	Obturator canal Adductor muscle fascia	Pain in medial thigh Aggravation with movement into abduction
Femoral	Beneath iliopsoas tendon Inguinal ligament Adductor canal	Reproduction of symptoms with modified Thomas test position Quadriceps muscle weakness Pain in the anteromedial knee joint, medial leg, and foot.
Lateral Femoral Cutaneous	Inguinal ligament	Positive pelvic compression test