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Related Concept Videos

Organization of the Brain01:30

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The brain is an integral component of the nervous system and serves as the center for processing sensory inputs, making decisions, and directing bodily actions. This complex organ is organized into three primary sections: the hindbrain, midbrain, and forebrain, each responsible for a range of vital functions.
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The brain is the most complex organ in the human body. It consists of four main parts: the cerebrum, diencephalon, cerebellum, and brainstem.
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The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
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Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
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Neurons, the fundamental units of the brain and nervous system, function as the primary transmitters of information throughout the body. Their ability to communicate through electrical and chemical signals is vital for every bodily function, from regulating the heartbeat to processing complex thoughts. Each neuron has three main components: the cell body (soma), dendrites, and an axon, each specialized to facilitate swift and efficient neural communication.
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The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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Updated: Nov 25, 2025

Microdissection of Mouse Brain into Functionally and Anatomically Different Regions
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The brain as a dynamically active organ.

Björn Brembs1

  • 1Universität Regensburg, Institut für Zoologie - Neurogenetik, Regensburg, Germany.

Biochemical and Biophysical Research Communications
|December 15, 2020
PubMed
Summary
This summary is machine-generated.

Nervous systems are not static but actively generate behavior. This review challenges the traditional sensorimotor hypothesis by highlighting dynamic neural networks and goal-directed actions.

Keywords:
Active-dynamicBehaviorCognitionEvolutionNeurosciencePassive-static

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Systems Biology

Background:

  • Traditional view of nervous systems as passive, static networks responding to stimuli (sensorimotor hypothesis).
  • Accumulating evidence over a century suggests this passive-static perspective is inaccurate.
  • Need for a paradigm shift towards understanding dynamic neural processes.

Purpose of the Study:

  • To review historical perspectives on general brain function.
  • To present modern evidence that refutes the sensorimotor hypothesis.
  • To emphasize the active and dynamic nature of nervous systems.

Main Methods:

  • Literature review of historical and modern neuroscience research.
  • Analysis of evidence supporting active, goal-directed behavior generation.
  • Critique of the passive-static model of neural networks.

Main Results:

  • The sensorimotor hypothesis is increasingly falsified by empirical data.
  • Nervous systems exhibit dynamic changes in connectivity.
  • Behavior is actively generated to achieve goals, including sensory feedback control.

Conclusions:

  • Nervous systems are dynamic, not static, and actively generate behavior.
  • The sensorimotor hypothesis fails to capture the complexity of neural function.
  • A new framework is needed to understand goal-directed neural activity and adaptive behavior.