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Related Concept Videos

Organization of the Brain01:30

Organization of the Brain

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.
Hindbrain
The hindbrain, located at the base of the brain, plays a vital role in regulating automatic processes that sustain life. It includes the medulla oblongata, which is essential for...
Anatomy of the Brain: Major Regions01:20

Anatomy of the Brain: Major Regions

The brain is the most complex organ in the human body. It consists of four main parts: the cerebrum, diencephalon, cerebellum, and brainstem.
The cerebrum is the largest section of the brain and divides into left and right hemispheres, separated by a deep fissure. The cerebral outer layer of grey matter — the cerebral cortex — comprises elevations called gyri and shallow groves called sulci. The inner portion of white matter includes long nerve fibers known as axons, which connect various areas...
Functional Brain Systems: Reticular Formation01:13

Functional Brain Systems: Reticular Formation

The reticular formation is a complex network of gray and white matter located within the brainstem extending from the medulla to the midbrain.
Within the reticular formation, there are several distinct nuclei that can be classified into three broad categories. The Raphe nuclei are located along the midline of the brainstem. They are primarily known for their role in synthesizing and releasing serotonin, a neurotransmitter involved in regulating mood, appetite, sleep, and circadian rhythms. The...
Cerebrum: Anatomical Overview II01:11

Cerebrum: Anatomical Overview II

Each cerebral hemisphere can be divided into three main regions. The outermost region, the cerebral cortex, is a thin layer (2 to 4 millimeters thick) made up of gray matter, consisting of neuron cell bodies, dendrites, glial cells, and blood vessels. The middle region, or white matter, is primarily composed of myelinated nerve fibers organized into three types of large tracts: association fibers, commissures, and projection fibers. Association fibers connect different areas within the same...
Neural Circuits01:25

Neural Circuits

Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
Neuron Structure01:31

Neuron Structure

Overview

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Related Experiment Video

Updated: Jun 22, 2026

Recording and Analyzing Multimodal Large-Scale Neuronal Ensemble Dynamics on CMOS-Integrated High-Density Microelectrode Array
09:44

Recording and Analyzing Multimodal Large-Scale Neuronal Ensemble Dynamics on CMOS-Integrated High-Density Microelectrode Array

Published on: March 8, 2024

Complex modular structure of large-scale brain networks.

M Valencia1, M A Pastor, M A Fernández-Seara

  • 1Laboratoire de Neurosciences Cognitives et Imagerie Cerebrale, LENA-CNRS UPR-640, Paris 75651, France.

Chaos (Woodbury, N.Y.)
|July 2, 2009
PubMed
Summary
This summary is machine-generated.

Brain networks exhibit modular organization, revealing distinct functional modules spatially aligned with anatomical structures. This modularity supports integrated and specialized brain functions during rest.

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3D Scanning Technology Bridging Microcircuits and Macroscale Brain Images in 3D Novel Embedding Overlapping Protocol
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Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits
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Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits

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Last Updated: Jun 22, 2026

Recording and Analyzing Multimodal Large-Scale Neuronal Ensemble Dynamics on CMOS-Integrated High-Density Microelectrode Array
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Published on: March 8, 2024

3D Scanning Technology Bridging Microcircuits and Macroscale Brain Images in 3D Novel Embedding Overlapping Protocol
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Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits
10:32

Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits

Published on: April 15, 2015

Area of Science:

  • Neuroscience
  • Network Science
  • Systems Biology

Background:

  • Modular structures are prevalent in complex real-world networks, including biological and social systems.
  • Understanding brain network organization is crucial for deciphering brain function and dysfunction.

Purpose of the Study:

  • To investigate the modular organization of large-scale brain networks using functional magnetic resonance imaging (fMRI) data.
  • To determine the spatial distribution and functional significance of identified brain modules.

Main Methods:

  • Analysis of voxel-level brain networks derived from resting-state fMRI signals.
  • Application of a random-walk-based method to identify network modularity.
  • Examination of inter- and intramodular connection patterns to define node functional roles.

Main Results:

  • The study identified a modular architecture within large-scale brain networks.
  • These modules demonstrated a spatial distribution that corresponded with known anatomical structures.
  • Functional roles of brain regions were characterized by their connectivity patterns within and between modules.

Conclusions:

  • The modular organization of brain networks provides a structural foundation for brain function.
  • This architecture facilitates the integration of distant brain areas and specialization of function during resting-state activity.