Perez reflex /pərez″, per″ez/ [Bernard Perez, French physician, 1836–1903; L, reflectere, to bend back] , the normal response of an infant to cry, flex the limbs, and elevate the head and pelvis when supported in a prone position with a finger pressed along the spine from the sacrum to the neck. Persistence of the reflex beyond the 6 months of age may indicate brain damage.
