Cross crawl refers to movements in which we use opposition such as crawling, walking, running, and swimming. Opposition means that opposite sides of the body work together to coordinate the right arm and left leg, then the left arm and right leg.
Therapeutically, cross crawl refers to any intentional cross-lateral activity in which you cross the mid-line of the body, such as touching opposite hand and knee or foot. Performing this movement builds the bridge between the right and left hemispheres of the brain, allowing for electrical impulses and information to pass freely between the two, which is essential for physical coordination as well as cerebral activities, such as learning language, reading, and hand-to-eye coordination.