Whiplash patients  Inclusion Criteria:  Neck pain within 4 weeks after the trauma Native Dutch speaker Refraining from consuming caffeine, alcohol and nicotine in the hour before the MRI scans in both measurement times  Exclusion Criteria:  Neuropathic pain Being pregnant A history of a chronic pain syndrome Chronic fatigue syndrome Fibromyalgia Cardiovascular disorders Epilepsy Endocrinological disorders Rheumatic disorders Psychiatric disorders History of neck surgery Loss of consciousness during/after the whiplash trauma MRI incompatible health condition (e.g., pacemaker, metal prosthetic devices) Claustrophobia.  Healthy volunteers: (matched for age and gender). Additional exclusion criteria include for healthy volunteers  a history of a chronic pain syndrome a pain condition in the last six months for which treatment was sought