Source:http://linkedlifedata.com/resource/umls/id/C0026841
MSH: The state of activity or tension of a muscle beyond that related to its physical properties, that is, its active resistance to stretch. In skeletal muscle, tonus is dependent upon efferent innervation. (Stedman, 25th ed),CSP: resistance to passive elongation or stretch.,CSP: condition of moderate contraction produced by stretching a muscle.