Spastic cerebral palsy
Spastic cerebral palsy, sometimes also termed bilateral spasticity, is the type of cerebral palsy wherein spasticity (also known in some versions of colloquial English as "muscle tightness") is either the dominant or exclusive impairment present.
It is by far the most common type of overall cerebral palsy, occurring in 90% of all cases according to the Society for Cerebral Palsy in Europe (SCPE); even if the 90% assertion is an exaggeration, however, more conservative scientific estimates still place the prevalence of spasticity-dominant cerebral palsy at anywhere from 70–80% of all cases, leaving cases dominated by ataxic cerebral palsy, dyskinetic cerebral palsy and athetoid cerebral palsy trailing at 20–30%.