Name: how the brain’s two halves work
Uploaded: 2024-08-29T22:13:37.000Z
Duration: 1 min 5 s
Channel: JoVE

The human brain cortex is divided into two cerebral hemispheres: the left and the right.
The corpus callosum, a robust bundle of neural fibers, connects these two hemispheres. It facilitates communication between them, enabling each hemisphere to control and receive information from the opposite side of the body. For instance, the motor cortex in the left hemisphere directs movements of the right hand and vice versa.
The left hemisphere specializes in processing structured linguistic information, logical reasoning, analytical tasks, and managing activities such as speech, grammar, and syntax when reading a book or singing lyrics.
In contrast, the right hemisphere interprets nonverbal information, including spatial perception, visual recognition, and emotional variations.
It also interprets the deeper meanings of stories and vocal intonations.

cerebral hemispheres

The human brain, a complex organ, is functionally divided into two cerebral hemispheres&#8212;left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain&#39;s comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor information from the opposite side of the body. This arrangement is vital for coordinated physical actions and sensory perceptions.
Each hemisphere of the brain is specialized to handle different types of cognitive and perceptual tasks, a phenomenon known as lateralization.
Left Hemisphere
The left hemisphere is predominantly responsible for processing structured linguistic and mathematical information. It oversees functions such as speech production, comprehension of grammar and syntax, and other elements of language that are essential in reading and verbal communication. This hemisphere&#39;s ability to break down words into their constituent sounds and to analyze sentence structure is critical for effective communication.
Right Hemisphere
The right hemisphere excels in processing visuospatial and nonverbal information. It plays a crucial role in recognizing faces, interpreting visual scenes, and processing music and other complex sounds. Furthermore, this hemisphere is adept at discerning emotional tone and non-literal language nuances such as sarcasm or irony. This capability is vital for social interactions and the understanding of subtle communication cues.
Interestingly, even in cases of severe brain trauma or in individuals with a &#39;split brain&#39; &#8212; a condition where the corpus callosum is surgically severed or absent&#8212;the human brain demonstrates a remarkable degree of plasticity. In such situations, each hemisphere can adapt by compensating for functions typically managed by the other. For instance, when connections between the hemispheres are disrupted, individuals can still engage in complex tasks, demonstrating the brain&#39;s adaptability and the independent capabilities of each hemisphere.
The corpus callosum not only serves as a bridge facilitating interhemispheric communication but also ensures that the specialized functions of each hemisphere are harmoniously integrated, enabling a cohesive and efficient processing of information across the brain. This integration is fundamental to the multifaceted nature of human cognition, emotion, and behavior.

Cerebral Hemispheres

The human brain cortex is divided into two cerebral hemispheres: the left and the right.
The corpus callosum, a robust bundle of neural fibers, connects ...

Education

JoVE Core

Introduction to Psychology

Unit 1

Biopsychology

KEY TERMS AND CONCEPTS

how the brain’s two halves work

The brain’s two cerebral hemispheres work together to process information and control the body. The left and right hemispheres are linked by the corpus callosum, a large bundle of nerve fibers. This connection lets the two sides share sensory and motor information, with each hemisphere controlling the opposite side of the body.

The hemispheres are also specialized for different tasks. This is called lateralization, which means certain functions are handled more strongly by one side than the other. The left hemisphere is mainly involved in language and math. It supports speech production, grammar, syntax, and the sound structure of words, which are important for reading and speaking.

The right hemisphere is more active in visuospatial and nonverbal processing. It helps with recognizing faces, understanding visual scenes, and processing music and other complex sounds. It also plays a role in reading emotional tone and non-literal language such as sarcasm or irony. These skills are important for social communication and for noticing subtle cues in everyday speech.

Even when the brain is badly injured or when the corpus callosum is cut or missing, known as split brain, the brain can still adapt. In these cases, each hemisphere may take on some functions usually handled by the other. This plasticity shows that the brain can compensate and still support complex tasks. The corpus callosum therefore acts as both a bridge and a link that helps the two specialized hemispheres work as one system.

How the Brain’s Two Halves Work

introduction to biological bases of psychology

introduction-to-biological-bases-of-psychology

Biological Factors Shaping Behavior and Mind

Biopsychology connects biology and psychology by showing how the body influences behavior and mental processes. It focuses on the nervous system, neurotransmitters, hormones, genetics, and evolutionary ideas. Together, these areas help explain why people think, feel, and act the way they do. The nervous system is the main foundation of biopsychology. It has two parts: the central nervous system, or CNS, and the peripheral nervous system, or PNS. The CNS includes the brain and spinal cord and...

nervous system

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The brain’s two cerebral hemispheres work together to process information and control the body. The left and right hemispheres are linked by the corpus callosum, a large bundle of nerve fibers. This connection lets the two sides share sensory and motor information, with each hemisphere controlling the opposite side of the body. The hemispheres are also specialized for different tasks. This is called lateralization, which means certain functions are handled more strongly by one side than the...

lobes of the cerebrum

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spinal cord

Spinal Cord Nerves and Reflexes

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lateralization

Brain Hemisphere Specialization

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human genetics

Genes, Behavior, and Mental Health

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neuroplasticity

How the Brain Rewires Itself

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Brain Cortex Areas for Sensation and Movement

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the endocrine system

Endocrine Glands and Hormone Signals

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inheritance

Genes, Traits, and Mendel's Rules

Genes, traits, and Mendel's rules explain how characteristics pass from parents to offspring. Gregor Mendel's pea plant experiments changed how scientists understand heredity. His work showed that traits are controlled by discrete units inside organisms called genes. Genes usually come in pairs. One gene is inherited from each parent, and together they make a person's genotype. Genotype is the genetic blueprint for potential traits. Examples include blood type, eye color, and inherited...

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How Environment Shapes Gene Expression

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heritability

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natural selection and adaptation

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key terms and concepts

Learn how the left and right cerebral hemispheres communicate through the corpus callosum, share body control, and specialize in language, space, and emotion.

How the Brain’s Two Halves Work | JoVE K12

JoVE Core Introduction to Psychology offers an engaging learning experience on the fundamental principles of psychology through concise video lessons. Students will explore important topics such as cognitive processes, emotional regulation, and neural mechanisms, establishing a strong foundation in the study of the mind and human behavior. This series provides an accessible and captivating approach to grasp the essential concepts of the discipline.

introduction to psychology

How the Brain’s Two Halves Work

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