 Historical progression of spasticity and the upper motor neuron lesion on which it is based has progressed considerably in recent decades.However, the term "spasticity" is still often used interchangeably with "upper motor neuron syndrome" in the clinical settings, and it is not unusual to see patients labeled as "spastic" who actually demonstrate not just spasticity alone, but also an array of upper motor neuron findings.Research has clearly shown that exercise is beneficial for spastic muscles, even though in the very early days of research it was assumed that strength exercise would "increase" spasticity.