Neonate with hyperekplexia and typical startle response to tactile stimulation

Fifteen-day-old neonate with typical startle response to tactile stimuli in the face and mainly the nose. Please note that marked generalized startle response (typical of hyperekplexia) is triggered each time the face and mainly the nose is tapped. This occurs immediately after the stimulus and does not show signs of habituation on repetitive stimulation. (Contributed by Dr. Federico Vigevano.)