Definition: Spasticities are involuntary movements that occur during certain activities or conditions, such as in a person's movement of the limbs. These movements can be caused by injuries, neurological disorders, or other medical conditions. Spasticities can affect different parts of the body and can include tremors, rigidity, spasm, and weakness. They may also cause pain or discomfort during these activities, and they are often accompanied by difficulties with mobility and coordination.