Continuous involuntary sustained muscle contraction. When an affected muscle is passively stretched, the degree of resistance remains constant regardless of the rate at which the muscle is stretched. This feature helps to distinguish rigidity from muscle spasticity. (Human Phenotype Ontology, HP_0002063)
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9 genes associated with the Muscle Rigidity phenotype by text-mining GWAS publications from the HuGE Navigator Gene-Phenotype Associations dataset.