Bilateral coordination refers to the ability to coordinate both sides of the body at the same time in a controlled and organized manner; for example, stabilizing paper with one hand while writing/ cutting with the other. Good bilateral integration/ coordination is an indicator that both sides of the brain are communicating effectively and sharing information. Children who have difficulty coordinating both sides of their body can have difficulty completing daily living tasks (dressing, tying shoes), fine motor activities (banging blocks together, stringing beads, buttoning), visual motor tasks (drawing, writing, cutting, catching/ throwing), and gross motor activities (crawling, walking, climbing stairs, riding a bike).
“Crossing the midline” is an integral skill related to bilateral coordination. Crossing the midline refers to the ability to spontaneously cross over the midline of the body during motor completion/ functional tasks- moving one hand, foot, or eye into the space of the other hand, foot, or eye (i.e. sitting with legs crossed, scratching the opposite elbow, successfully intersecting lines to draw a cross- without switching hands, reading left to right, etc.). Babies and toddlers may use both hands equally and initiate picking up or interacting with an object with whichever hand is closer (i.e. if the item is on the left side of the table he will likely use the left hand, if it the object is on the right side, he will likely use the right hand). However, by 3-4 yrs. of age a child should typically have mastered the skill of “crossing midline.” Establishing hand dominance (a “worker hand” vs. a “helper hand”) is an indicator that the brain is maturing, and lateralization is occurring- this is strongly correlated with the ability to cross midline. The child who avoids midline crossing can have difficulty coordinating both sides of the body and often times, has difficulty establishing hand dominance; tends to alternate hand use when coloring, writing, eating, throwing, etc.
The following activities are helpful suggestions for developing bilateral coordination:
Tearing/ crumpling tissue paper (create a craft, etc.)
Connecting/ separating construction toys; magnetic blocks, Mega blocks, pop-beads, Legos
Playing catch/ throw games to encourage coordinating both hands
Playing with toy instruments; banging drums, triangle, symbols
Pinching, pulling, squeezing, play-doh (finding hidden objects, etc.); as well as using the play-doh “tools”
Playing with a Zoom Ball
Stringing uncooked pasta on yarn, or beads on pipe cleaners or string
Snipping/ cutting with scissors- straw, play-doh, construction paper (thicker) etc.
Lacing activities, use hole punchers
