Corpus: Adductor magnus muscle
1. Definition
The adductor magnus muscle belongs to the thigh adductor muscle group and is located on the medial side of the thigh.
2. Progression
2.1. Origin
The adductor magnus muscle originates from the inferior ramus of the pubic bone to the ischial tuberosity. The portion originating from the pubic bone is also known as the adductor minimus muscle.
2.2. Attachment
The proximal fibers of the adductor magnus muscle attach to the medial labium of the linea aspera, while the distal fibers attach to the medial supracondylar line and the adductor tubercle of the medial epicondyle.
A slit, known as the adductor hiatus, exists between these attachments. This hiatus, along with the vastus medialis and adductor longus muscles, forms the adductor canal. The femoral artery and vein pass through this canal dorsally, while the saphenous nerve penetrates the vastoadductor membrane anteriorly and runs ventrally.
3. Innervation
The adductor magnus muscle is innervated by the posterior branch of the obturator nerve (segments L2 to L4) and the dorsal part by the tibial nerve (segments L4 to L5).
4. Function
The primary function of the adductor magnus muscle is to adduct the thigh. The proximal part, which inserts at the linea aspera, supports external rotation. The part that inserts on the adductor tubercle facilitates internal rotation of the thigh when it is externally rotated in a flexed position. Additionally, the muscle aids in hip joint extension.