The Power of Left Brain Function: Understanding its Characteristics and Weaknesses

Whether you’re self-assessing your cognitive abilities or contemplating your career path, understanding the functions and characteristics of the left brain can unlock insights into your potential. As research continues to uncover the complexity of cognitive function, many have turned to the left and right brain theory to understand their unique cognitive abilities.

In this post, we will explore what the left side of the brain does, its primary functions, and some of its weakness characteristics. We’ll also delve into different factors that contribute to left brain dominance, as well as career paths suited for those with strong left brain function.

What Does the Left Side of the Brain Do?

The left side of the brain is commonly referred to as the “logical” or “analytical” side of the brain. It controls the right side of the body and is typically associated with language, sequential and analytical processing, and logic-based tasks.

The left brain function includes:

1. Language Processing

The left brain hemisphere houses the Broca’s and Wernicke’s areas, which are responsible for language comprehension and speech production. It also helps with reading, writing, and grammar.

2. Logical and Analytical Processing

The left brain functions as a sequential and analytical processor, which means it can excel at tasks that require step-by-step problem-solving, data analysis, and pattern recognition.

3. Reasoning and Critical Thinking

The left hemisphere houses the critical thinking and reasoning center, which aids in intellectual activities such as recognizing contradictions, analyzing arguments, and understanding relationships.

What Are 10 Characteristics of the Left Brain?

  1. Sequential and Analytical Processing
  2. Logical Thinking
  3. Rationality
  4. Attention to Detail
  5. Language Processing
  6. Mathematical and Scientific Skills
  7. Memory of Facts and Data
  8. List-Making and Organization
  9. Time Management
  10. Structured Thinking

Left Brain Weakness Characteristics

While the left brain is vital for rational thinking and logical reasoning, its dominance may lead to weaknesses in certain areas:

1. Creativity

Left-brainers tend to rely on logic and facts, making it challenging to think outside the box and come up with creative solutions.

2. Intuition

Since the left brain deals with logic and reason, the intuitive and emotional aspects of decision making can be challenging for left-brained individuals.

3. Spatial Awareness

The left hemisphere struggles with spatial awareness, which involves perceiving objects in one’s environment accurately.

Left Brain Dominance: Factors and Percentage of Population

While left brain dominance is not an indicator of intelligence, it can influence cognitive abilities, behaviors, and career paths. While most people use both sides of their brain, some individuals may be more left-brain dominant than others.

Different factors contribute to left brain dominance, including genetics, environmental factors, and early-life development. According to a study published in Neuron, approximately 34% of the population is left-brained dominant, while 10% are right brain dominant. The remaining individuals exhibit more balanced functioning in both hemispheres.

Right Brain vs. Left Brain Test

If you’re curious about your cognitive dominance, several online tests measure the dominance of your left and right brain. Based on personality and cognitive processing, these tests can eventually help you understand your strengths and weaknesses in specific areas, including creative thinking and problem-solving.

Right Brain Dominant Careers

While left-brained individuals may excel in analytical and logical jobs, right-brained individuals may be more inclined toward careers that emphasize creativity, spatial awareness, and emotional intelligence. Some of these careers include graphic design, writing, music, and art.


Understanding the functions and characteristics of your left brain can unlock insights into both your cognitive abilities and career path. While logical and analytical thinking is essential, it’s important to recognize the strengths and weaknesses of your left brain. Whether you’re left-brain dominant or not, honing skills in both hemispheres can help you become a well-rounded and informed individual.

So, if you’re left brain dominant, you can explore careers in the analytical field, like data analysis, accounting, and science. However, the best advice is to follow your passion and do what you’re best at, whether it’s a left or right brain-dominant career.