 The proposed study aims to explore why acute pain turns, in some patients, into chronic pain, and to develop tools for prediction of this transition. Based on the clinical and psychological assessment along with psychophysical and neurophysiological assessment of pain perception, with the analysis of connectivity between several brain centers relevant for pain processing, together with pain genetics, we expect to develop a tool, that will predict, for the individual patient with acute pain inflicted by a whiplash injury, what are the chances for himher to go into chronic pain situation. Further, by knowing the dysfunctions of pain processing that a patient has, it will be possible to offer the treatment of highest chances to succeed. 