The Paralympic Games, also known as the Games of the Paralympiad, are a periodic series of international multi-sport events that feature athletes with a variety of physical disabilities, such as impaired muscle power, impaired passive range of movement, limb deficiency, leg length distinction, short stature, hypertonia, ataxia, athetosis, vision impairment, and intellectual impairment. There are Winter and Summer Paralympic Games, which have been held practically immediately following the respective Olympic Games since the 1988 Summer Olympics in Seoul, South Korea. The Paralympic Games are managed by the International Paralympic Committee. The Paralympic Games are held concurrently with the Olympic Games, while the IOC-recognized Special Olympics World Games include athletes with studious disabilities and the Deaflympics include competitors who are deaf.