The Paralympic Games or Paralympics are a periodic series of international multi-sport events involving athletes with a range of disabilities, including impaired muscle power, leg length difference, short stature, hypertonia, ataxia, athetosis, vision impairment and intellectual impairment. There are Winter and Summer Paralympic Games, which since the 1988 Summer Olympics in Seoul, South Korea, are held almost immediately following the respective Olympic Games. All Paralympic Games are governed by the International Paralympic Committee (IPC). The Paralympic Games are organized in parallel with the Olympic Games, while the IOC-recognized Special Olympics World Games include athletes with intellectual disabilities, and the Deaflympics include deaf athletes.