grasp reflex [ME, graspen, grab; L, reflectere, to bend back] , a reflex induced by stroking the palm or sole with the result that the fingers or toes flex in a grasping motion. The reflex is a pathological manifestation of diseases of the premotor cortex. In young infants the tonic grasp reflex is normal; the child can grasp the examiner’s fingers so firmly that he or she can be lifted into the air. Also called darwinian reflex.
