A quadriplegic has a body, they can move their head, mouth, eyes, etc, and those things can influence the world. That constitutes a perception action loop which is a basic requirement for intelligence.

An AI without any actuators is more like a fully paralyzed person.

A baby which was born totally paralyzed would in fact be profoundly retarded and they would be unable to communicate or form anything resembling intelligence. See http://io9.gizmodo.com/the-seriously-creepy-two-kitten-exper...

An AI with vocal cords and a microphone in the real world has a body.