This is clipart converted and broken apart that has been released into the public domain because the document says so, and its from NASA, a USA government agency. The publication is called "The Brain in Space:"
http://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/The.Brain.in.Space.html
Here we offer you a great logo suitable for you designs. A digital apple, created with scribbles and pixels in green color. Perfect for design marketing,business logo and the like. Under Creative Commons 3.0 Attribution.Hope you like it!