You observe a 7-mo. baby who is sitting and playing on the floor being knocked off balance by the family dog. The baby immediately reacts by extending and abducting his arm to the side (opposite to the side hit by the dog). What reflex is this infant demonstrating?
Symmetric tonic neck reflex (STNR)
Prone tilting
Forward parachute (UE protective extension) forward
Sideways parachute (UE protective extension to the side)