adductor mag·nus (m g n s)n. A muscle with origin in the ischial tuberosity and ischiopubic ramus, with insertion to the linea aspera and femur, with nerve supply from the obturator and sciatic nerves, and whose action adducts and extends the thigh. |
adductor magnus,
the long, heavy triangular muscle of the medial aspect of the thigh. The adductor magnus acts to adduct the thigh. The proximal portion acts to rotate the thigh medially and flex it on the hip; the distal portion acts to extend the thigh and rotate it laterally. Compare adductor brevis, adductor longus, gracilis, pectineus.
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