Part 1 Basic Approach: The epidemiology of musculoskeletal pain (G. Magni). Neurophysiology of muscle in relation to pain (S. Mense). Physiology of muscle fatigue and associated pain (O.M. Sejersted, N.K. Vollestad). The mechanisms of fibromyalgia (P.D. Wall). Morphological changes in muscle in fibromyalgia and chronic shoulder myalgia (K.G. Henriksson, A. Bengtsson. R. Lindman, L.-E. Thornell). Endogenous opioid peptides, substance P, calcitonin gene-related peptide and their relation to fibromyalgia (H. Vaeroy, F. Nyberg). Psychological assessment of patients with musculoskeletal pain (B. Ellertsen, K. Troland, H. Vaeroy). Compensation and motivation in relation to musculoskeletal pain (G. Mendelson). General considerations on psychiatric illness in relation to musculoskeletal pain (G. Magni). Special psychiatric issues (H. Merskey). Steep and musculoskeletal pain (H. Moldofsky). Hypervigilance effects in fibromyalgia - Pain experience and pain perception (G.B. Rollman, S. Lautenbacher). Clinical experimental investigation in fibromyalgia and myofascial pain (E. Tunks). Pharmacology of drugs used in the treatment of fibromyalgia and myofascial pain (T.I. Tonnessen). Part 2 Clinical Approach: The classification of fibromyalgia and myofascial pain (H. Merskey). The clinical features of the fibromyalgia syndrome (G.A. McCain). Fibromyalgia and problems in classifications of musculoskeletal disorders (F. Wolfe). Temporomandibular pain (Y. Sharav, R. Benoliel). Cervical whiplash injury (R.W. Teasell, A.P. Shapiro). Neck pain - Joint pain or trigger points? (N. Bogduk, D.G. Simons). Cervicogenic headache - A headache syndrome in its own right. The differential diagnosis from other headaches and chronic musculoskeletal pain conditions (T.A. Fredriksen. 0. Sjaastad). A metabolic basis for fibromyalgia syndrome (I.J. Russel). The relationship between pain and muscle activity in fibromyalgia and similar conditions (J.P. Lund, C.S. Stohler, C.G. Widmer). Postural and mechanical factors in localized and generalized fibromyalgia/fibrositis syndrome (G. Granges, G. Littlejohn). Virus syndromes and chronic fatigue (S. Wessely, D. Newham). A review of the pharmacologic treatment of fibromyalgia and myofascial pain (D.L. Goldenberg). Psychological and psychiatric approaches in the treatment of musculoskeletal pain (R.G. Large). Treatment of myofascial pain and other dysfunction disorders (K. Lewit). A multidisciplinary approach to treating fibromyalgia (R.M. Bennett). Part 3 Research and Future Trends: Sensitization - A neurobiological theory for muscle pain (H. Ursin, I.M. Endresen. E. Haland, N. Mjellem-Joly). Experimental research on muscle physiology during work and exercise - Relation to the development of musculoskeletal pain and fatigue (S. Jacobsen, O.J. Hoydalsmo). Research and future trends (H. Vaeroy, H. Merskey).