This is the theme of a Greg Egan short (is there a scenario that guy hasn't come up with? Truly an SF beast). The body is grown at an accelerated rate with a re

This is the theme of a Greg Egan short (is there a scenario that guy hasn't come up with? Truly an SF beast). The body is grown at an accelerated rate with a relatively "dumb" brain. The brain has the capacity to carry out normal bodily functions and not much else. After a year, the original brain is transplanted into the body. That said, this is more like "very-hard-to-reach golden fruit", not low-hanging fruit.