Pectineus
The pectineus is a flat rectangular muscle of the adductor group. It is the smallest, most anterior and most proximal of the five adductors (muscles that act on closing your legs). It originates on the front of the pelvic girdle and inserts on the upper portion of the inner thighbone; the femur. It is monoarticular, meaning it only crosses and acts upon one joint: the hip. The main function of the pectineus is to adduct the thighs. It also flexes and internally rotates the thigh at the hip. When this muscle is tight it limits full range of motion in yoga poses like baddhakonasana (bound angle pose). You can see by the way my knees are so far off the ground that my pectineus muscles are extremely tight. Pectinues is innervated by the femoral nerve and the obturator nerve. It is associated with the second chakra. You cannot see the pectineus in most people, but you can feel it if you know where to go. While someone's leg is slightly flexed and externally rotated at the hip, and...