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Showing articles 0 to 2 of 2 Filter Applied: neck extension (Click to remove) Rigid Spine Syndrome and Rigid Spine Sign in Myopathies J Child Neurol 4:273-282, Merlini,L.,et al, 1989 Atypical Presentation of Progressive Supranuclear Palsy Ann Neurol 17:334-343, Davis,P.H.,et al, 1985 Showing articles 0 to 2 of 2