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Medial Compartment of the Thigh
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Components
| Medial thigh compartment muscles | Origin | Insertion | Action | Nerve roots | Nerves |
|---|---|---|---|---|---|
| Adductor Brevis | Body and inferior ramus of pubis (lateral to origin of gracilis) | Pectineal line and proximal part of linea aspera of femur | Adducts thigh; weak hip flexor | Obturator nerve (anterior or posterior division L2–L4) | |
| Adductor Longus | External surface of body of pubis (triangular depression inferior to pubic crest and lateral to pubic symphysis) | Linea aspera on middle one-third of shaft of femur | Adducts thigh; assists in hip flexion (especially from extended position) and medial rotation | L2 L3 L4 | Obturator nerve (anterior division L2–L4) |
| Adductor Magnus | Adductor part – inferior pubic ramus and ischial ramus; Hamstring part – ischial tuberosity | Adductor part – posterior femur (gluteal tuberosity, linea aspera, medial supracondylar line); Hamstring part – adductor tubercle of femur | Adducts thigh (powerfully); Adductor part flexes thigh; Hamstring part extends thigh | Adductor part – Obturator nerve (posterior division L2–L4); Hamstring part – Tibial division of sciatic nerve (L4–S1) | |
| Adductor Minimus | Ischiopubic ramus (inferior pubic ramus to ischial ramus) | Linea aspera (proximal medial lip) and adductor tubercle (via shared tendon) | Adducts thigh; assists lateral rotation and extension of thigh | Obturator nerve (L2–L4) and tibial division of sciatic nerve (L4–L5) – same innervation as adductor magnus | |
| External Obturator | External surface of obturator membrane; rim of pubis and ischium bordering obturator foramen | Trochanteric fossa on medial surface of greater trochanter | Externally rotates thigh; assists in adduction of hip; stabilizes pelvis (by pulling femoral head into acetabulum) | Posterior division of obturator nerve (L3–L4) | |
| Gracilis | ischiopubic ramus | tibia (pes anserinus) | flexes, medially rotates, and adducts the hip | anterior branch of Obturator Nerve | |
| Pectineus | pecten pubis and adjacent superior pubic ramus | pectineal line of the femur | adduct the thigh at the hip | Femoral Nerve |
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