Colin McCullough was born on June 1, 1937 in Australia, in the city of Wellington (New South Wales). From the age of five, she showed giftedness in drawing and poetry, but her parents, in whose memory the paintings of the Great Depression were vividly captured, insisted that her daughter choose a more prosperous path, so Colin, who also showed a craving for science, received a medical education and began to engage in neuropsychology.