Ihållande, ofrivillig muskelsammandragning, som ofta är ett tecken på basalgangliesjukdom. När en påverkad muskel sträcks passivt förblir graden av motstånd konstant oberoende av hur fort muskeln sträcks. Detta särdrag är till hjälp för att avgöra skillnaden mellan muskelstelhet och muskelspasticitet.
Continuous involuntary sustained muscle contraction which is often a manifestation of BASAL GANGLIA DISEASES. 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. (From Adams et al., Principles of Neurology, 6th ed, p73)
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Rigidity, Muscle — Rigidity, Muscular — Muscular Rigidity — Cogwheel Rigidity — Cogwheel Rigidities — Rigidities, Cogwheel — Rigidity, Cogwheel — Nuchal Rigidity — Rigidity, Nuchal — Extrapyramidal Rigidity — Rigidity, Extrapyramidal — Gegenhalten — Gegenhaltens — Catatonic Rigidity — Rigidity, Catatonic — Extensor Rigidity — Rigidity, Extensor