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left brain vs right brain

by Olivia Guerrero
(Argentina)


Is it true that the left side of the brain is especially adapted for the production and understanding of speech, while the right side of the brain is especially adapted for handling perceptual skills, such as drawing a picture or recognizing melodies?

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starstarstarstarstar 		Not that straightforward
by: Lia Lejeune

The concept of hemispheric specialization, often referred to as "lateralization of brain function," suggests that certain cognitive functions are predominantly localized in one hemisphere of the brain. While it is true that the brain's left and right hemispheres are not identical in their functions, the popular notion of a clear-cut division between "logical left" and "creative right" is somewhat oversimplified.

Here are some general tendencies of hemispheric specialization:

Language Processing: In most right-handed individuals and many left-handed individuals, language processing is largely localized in the left hemisphere, particularly in areas like Broca's area and Wernicke's area. These regions play crucial roles in speech production and language comprehension, respectively. However, it's essential to note that language processing is a complex function involving networks across both hemispheres, and some aspects of language processing can involve the right hemisphere.

Perceptual and Spatial Skills: The right hemisphere is generally associated with perceptual and spatial skills, such as recognizing faces, interpreting emotions, and understanding spatial relationships. It is also involved in processing nonverbal cues and visual imagery.

Motor Skills: While not directly related to the question, it's worth mentioning that the left hemisphere is responsible for controlling the right side of the body, and the right hemisphere controls the left side of the body. This crossed control is due to the way nerves in the brainstem connect to the opposite side of the body.

Individual Differences: It's important to emphasize that hemispheric specialization can vary among individuals. Some people may exhibit greater lateralization of specific functions, while others may show more bilateral distribution of those functions.

Plasticity and Complexity: The brain is incredibly adaptive and plastic, meaning that functions can be redistributed to different brain areas to some extent, especially after injury or during developmental processes.

It's essential to avoid overly rigid assumptions about the functions of each hemisphere, as the brain operates through interconnected networks, and most cognitive processes involve the collaboration of both hemispheres.

Additionally, handedness can also influence hemispheric specialization. For example, left-handed individuals may show different patterns of lateralization compared to right-handed individuals.

In summary, while certain cognitive functions tend to be associated with specific brain hemispheres, the brain's actual organization is much more complex, and numerous factors influence how various functions are distributed and interact within the brain. The field of neuropsychology continues to investigate these complexities to gain a more comprehensive understanding of brain function and lateralization.

Related Information on The All About Psychology Website

Why The Left-Brain Right-Brain Myth Will Probably Never Die Excellent article by psychologist, award-winning writer and best selling author Dr Christian Jarrett.

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