lateralize

Imagine drawing a line down the middle of your body. To lateralize means to move something to one side or to have it mainly connected with one side. This word is used most often when people talk about the brain, where the two halves can be stronger in different kinds of work. For example, in most people, language is mainly lateralized to the left hemisphere. The whole brain still works together, but some jobs are handled more by one side than the other.

The word comes from the Latin "lateralis," meaning "of or belonging to the side." Think of a football team: a lateral pass moves the ball sideways rather than forward. When a function, symptom, or physical trait is lateralized, it is not centered evenly; it shows up more on the left or the right.

To lateralize means to place, shift, or become more active on one side rather than staying evenly shared. In neuroscience, it often refers to a function being mainly handled by one hemisphere of the brain more than the other. This is an important idea in the study of brain organization. For example, in many people, language is more strongly lateralized to the left hemisphere, while some visual-spatial abilities are more strongly linked with the right. This pattern is called lateralization.

Beyond the brain, lateralize can describe physical or biological tendencies toward one side. In medicine, a sound during a hearing test may seem to lateralize to one ear. In biology, the word can describe traits or actions that favor one side of the body, such as handedness or other left-right differences.

The root is "lateral," meaning related to the side. You can think of a "lateral move" in a career as movement across rather than up or down. In the same way, to lateralize is to move away from the center and toward one side, or to give one side a larger role. The word usually suggests a left-right difference that has become clear, stable, or noticeable.