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what are the 2 fine motor skills that that play the greatest role in infant cognitive development? how do these motions evolve?
Reaching and grasping! By grasping things, turning them over, and seeing what happens when they are released, babies learn about sights, sounds, and touch. Newborns pre-reach with uncoordinated swoops, 3-4 month olds have an ulnar grasp in which finger encloses with palm, 4-5 month olds transfer objects from hand to hand, and 9 month olds have a pincer grasp using a well coordinated thumb and index finger.