1. A transverse coupler for a spinal correction system, the transverse coupler comprising: an adjustment assembly configured to be secured to a first rod extending longitudinally along a first side of a spine, the adjustment assembly including a rider, a retainer, and a first rod coupler, the first rod coupler configured to receive the first rod such that the first rod is free to translate axially through the first rod coupler, pivot in pitch and yaw at the first rod coupler, and roll within the first rod coupler; an adjustment arm configured to be secured to a second rod extending longitudinally along a second side of a spine and to be extended from a second side of a spine toward a first side of a spine, the adjustment arm defining a first end, a second end, a first surface, a second surface, and a longitudinal axis extending from the first end to the second end; a force directing member with an elongate body configured to couple with the rider and the first end of the adjustment arm, the rider and the elongate body being configured to form a complementary fit, wherein the rider can move along the elongate body and couple with the adjustment arm at a plurality of angles; a first intermediate anchor adapted to be positioned along the second rod between the adjustment arm and a first stabilizing anchor; and a second intermediate anchor adapted to be positioned along the second rod between the adjustment arm and a second stabilizing anchor, wherein each of the first and second intermediate anchors is adapted to substantially constrain the second rod against substantial lateral translation.
4. The transverse coupler of claim 1 , wherein the force directing member is a post and the rider includes a slot with a top surface and bottom surface such that the slot is configured to receive the force directing member.