http://www.orthopaedicweblinks.com Internet resources relating to Muscle Rigidity. Continuous involuntary sustained muscle contraction <br>MeSH Search Term "Muscle Rigidity"[mesh] <br>ICD-10 Code G20-G26 Extrapyramidal and movement disorders <br>SNOMED-CT Term Muscle rigidity (finding) Concept ID: 16046003 <br>Synonyms - Muscular rigidity <br>Muscle stiffness <br>Muscular stiffness <br>Rigor <br>Muscle rigidity <br>Muscle rigidity (finding) en-us Wed Jun 30 2010 23:40:56 GMT Copyright 2005 OWL Inc. orthopaedicweblinks@gmail.com (Christian Veillette) orthopaedicweblinks@gmail.com (OWL Inc.)