Hypertonia, Hypertonus

Hypertonia, Hypertonus

Hypertonia or hypertonus is an exaggeration of normal muscular tone, manifest as resistance to passive movement. It usually implies spasticity of corticospinal (pyramidal) pathway origin, rather than extrapyramidal (lead-pipe) rigidity.

Cross References

Clasp-knife phenomenon; Hyperreflexia; Paratonia; Rigidity; Spasticity; Upper motor neurone (UMN) syndrome