Tactile sensory stimulation involves the sensation of touch and texture. Autistic children with tactile sensory issues may have difficulty tolerating the sensations generated as they dress or groom themselves, or even as they chew food. People with Alzheimer's disease and other dementias benefit through the sense of touch. Therapists work with tactile-sensitive individuals to desensitize them to unavoidable textures and touch sensations. This is accomplished gradually over time using Wilbarger therapy brushes, sand and water activity tables, therapy balls and rolls, and blankets which provide propioceptive feedback, gross motor control, and muscle movements.