Why does a baby grasp you when you stroke there palm?

Answer 1

This reaction is called a palmar grasp in a baby. This reaction usually persists until six months of age and sometimes longer in some babies. The babies typically begin to gain control of the grasp around six months. They use this as a method to support an object, and use their fingers as a type of scoop. Around 6-9 months the babies gain enough control to begin pulling their palm towards their face and mouth. This can usually signal the baby is ready to start self-feeding.