Reflexive, rudimentary, fundamental, specialized, lifelong application

Rudimentary, reflexive, fundamental, specialized, lifelong application

Reflexive, fundamental, rudimentary, specialized, lifelong application

Reflexive, rudimentary, specialized, fundamental, lifelong application

The baby moving his big toe upward in response to feeling a stroke on the bottom of his foot.

The baby grasping his hand in response to feeling a stroke on his palm.

The baby stepping in response to feeling one of his feet touch a flat surface.

The baby sucking in response to feeling something touch the roof of his mouth.