Muscle Rigidity


Catatonic Rigidity

Cogwheel Rigidities

Cogwheel Rigidity

Extensor Rigidity

Extrapyramidal Rigidity



Muscular Rigidity

Nuchal Rigidity

Rigidities, Cogwheel

Rigidity, Catatonic

Rigidity, Cogwheel

Rigidity, Extensor

Rigidity, Extrapyramidal

Rigidity, Muscle

Rigidity, Muscular

Rigidity, Nuchal

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)