The best replacement for spasticity is rigidity.

The best alternatives to spasticity are rated as following:
★★★★★  rigidity
★★★★  tone
★★  hypertonicity
★★  contracture
★  spasms
★  flaccidity
★  dystonia
★  spasm
★  muscle spasm
★  tonicity
★  fasciculations
★  high tone
  hypertonia
  stiffness
  muscular hypertonicity
  increased tone
  clonus
  muscle tone

Your alternative for spasticity is not listed? Suggest!
Speaking about spasticity, one probably shouldn't forget about cerebral palsy.

Other search terms related to spasticity and their ratings are:
★★★★★ cerebral palsy
★★★★ spinal cord injury
★★ clonus
★ hyperreflexia
★ dystonia
You have in mind a companion for spasticity and it is not yet here? Propose!



Google Trends

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spasticity
rigidity
tone