Generally, brain strokers and spinal cord injuries get treatment, they have strong stimulation.
Such treatment can crash body coordination and make their tendons and ligaments be harder.
Neurological disorder and paralysis can not react as normal for stimulation because their body censor can not work as normal.
About spinal cord injuries, most of them got strong stimulation when they got injury.
In this moment, their tissue reacted excessively for strong stimulation because tissue need to protect their body and it is emergency for body.
So when therapist treat spinal cord injuries and neurological disorders who got strong injuries, they need to release impact that remain in tissue and tissue can change be soft naturally.