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The palmar grasp reflex appears at birth and persists until five or six months of age. When an object is placed in the infant’s hand and strokes their palm, the fingers will close and they will grasp it. The grip is strong but unpredictable; though it may be able to support the child’s weight, they may also release their grip suddenly and without warning. The reverse motion can be induced by stroking the back or side of the hand.