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Related Concept Videos

Cerebral Hemispheres01:05

Cerebral Hemispheres

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The human brain, a complex organ, is functionally divided into two cerebral hemispheres—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's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...
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Cerebrum: Anatomical Overview II01:11

Cerebrum: Anatomical Overview II

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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...
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Lateralization01:28

Lateralization

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Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
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Lobes of the Cerebrum01:22

Lobes of the Cerebrum

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The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
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Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Association Areas of the Cortex01:21

Association Areas of the Cortex

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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Updated: Mar 28, 2026

Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
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Inter-hemispheric Claustral Connections in Human Brain: A Constrained Spherical Deconvolution-Based Study.

A Arrigo1, E Mormina2, A Calamuneri3

  • 1Department of Biomedical Sciences and Morphological and Functional Images, University of Messina, Via Consolare Valeria 1, 98125, Messina, Italy. alessandro.arrigo@hotmail.com.

Clinical Neuroradiology
|December 24, 2015
PubMed
Summary
This summary is machine-generated.

This study provides new evidence for inter-hemispheric claustral connections in humans using advanced MRI tractography. These findings reveal contralateral cortico-claustral and inter-claustral pathways, offering insights into brain coordination and recovery.

Keywords:
ClaustrumConstrained spherical deconvolutionDiffusion parametersInter-hemispheric connectionsProbabilistic tractography

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Area of Science:

  • Neuroscience
  • Human Brain Imaging
  • Connectomics

Background:

  • The claustrum, a deep gray matter structure, is known for its complex connectivity.
  • Previous research suggests claustral connections extend to the contralateral hemisphere, primarily in animal models.
  • Limited human studies have confirmed contralateral cortico-claustral and inter-claustral connections.

Purpose of the Study:

  • To provide robust tractography-based evidence for inter-hemispheric claustral connections in humans.
  • To utilize an optimized tractographic protocol for enhanced detection of these pathways.
  • To investigate the topographical organization of these contralateral connections.

Main Methods:

  • Employed advanced magnetic resonance imaging (MRI) with probabilistic constrained spherical deconvolution (PCSD) tractography.
  • Examined fifteen healthy human subjects.
  • Extracted quantitative diffusion parameters from reconstructed pathways.

Main Results:

  • Confirmed the existence of contralateral cortico-claustral and inter-claustral connections in humans.
  • Observed that these connections involve the superior portion of the claustrum with topographical organization.
  • Reported the first-time detection of inter-claustral connections traversing the anterior commissure in humans.

Conclusions:

  • These contralateral pathways may form the morphological basis for observed complex functional phenomena.
  • The findings suggest potential clinical implications for understanding inter-hemispheric coordination and functional recovery after claustrum damage.
  • Highlights the role of the claustrum in inter-hemispheric communication and brain plasticity.