"Sperry and Gazzaniga found that the left hemisphere controls speech, language, and comprehension; recognizes words, letters, and numbers; and does analysis and calculations. This is why people who are more methodical and logical are believed to be “left-brained.” Meanwhile, the right hemisphere controls creativity, perception, and spatial understanding, and recognizes faces, places, and objects – hence why more creative and emotional people are said to be “right-brained.” https://www.atlassian.com/blog/productivity/left-brain-vs-right-brain