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 미 항공 우주국 공간 과학 58294main_The.Brain.in.Space-page-75-asian-kid-head-twist
set of cyclic, cycle concentric rings. revolved spirals, vortexes, whorls. abstract circular, radial loop shapes, elements 나선형 벡터 소용돌이 Spirals, swirl, twirls set. concentric, radial graphics
set of cyclic, cycle concentric rings. revolved spirals, vortexes, whorls. abstract circular, radial loop shapes, elements 나선형 벡터 소용돌이 Spirals, swirl, twirls set. concentric, radial graphics
set of cyclic, cycle concentric rings. revolved spirals, vortexes, whorls. abstract circular, radial loop shapes, elements 나선형 벡터 소용돌이 Spirals, swirl, twirls set. concentric, radial graphics
set of cyclic, cycle concentric rings. revolved spirals, vortexes, whorls. abstract circular, radial loop shapes, elements 나선형 벡터 소용돌이 Spirals, swirl, twirls set. concentric, radial graphics
set of cyclic, cycle concentric rings. revolved spirals, vortexes, whorls. abstract circular, radial loop shapes, elements 나선형 벡터 소용돌이 Spirals, swirl, twirls set. concentric, radial graphics