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Cerebral Hemispheres

Cerebral Hemispheres

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...

Cerebrum: Anatomical Overview II

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...

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The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
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Central to the gray matter is...

Motor and Sensory Areas of the Cortex

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Cerebrum: Anatomical Overview I

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The main and largest component of the human brain is the cerebrum. The cerebrum consists of two main parts: the cerebral cortex, an outer layer with wrinkles or folds known as gyri and shallow grooves called sulci, and a deeper region beneath it. The cerebrum divides into two distinct hemispheres and contains five different lobes: the frontal, parietal, temporal, occipital, and insula. The central sulcus separates the frontal and parietal lobes and two functionally important gyri — the...

Cerebellum: Anatomical Regions

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Exploring Deep Space - Uncovering the Anatomy of Periventricular Structures to Reveal the Lateral Ventricles of the Human Brain

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The human motor corpus callosum.

Mathias Wahl¹, Ulf Ziemann

¹Department of Neurology, Goethe-University, Frankfurt am Main, Germany.

Reviews in the Neurosciences

|March 26, 2009

Summary

The motor corpus callosum (CC) connects brain hemispheres for information transfer. This review explores its structure, function, and location in humans using advanced neuroimaging and neurophysiology.

Area of Science:

Neuroscience
Neuroanatomy
Neurophysiology

Background:

The corpus callosum (CC) is the largest white matter tract connecting the brain's hemispheres.
It facilitates interhemispheric information transfer, crucial for cognitive functions.
The motor CC specifically links primary motor cortices, but its detailed properties remain under-explored.

Purpose of the Study:

To review current knowledge on the human motor corpus callosum.
To highlight recent findings on its structure-function relationship.
To synthesize information from advanced neuroimaging and neurophysiological studies.

Main Methods:

Review of existing literature focusing on human motor CC research.
Analysis of studies employing multimodal neuroimaging techniques (e.g., diffusion tensor imaging).

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Inclusion of studies utilizing advanced neurophysiological methods (e.g., TMS, EEG).

Main Results:

Recent studies are beginning to map the precise location of motor fibers within the CC.
Emerging evidence links structural characteristics of the motor CC to motor control and function.
Multimodal techniques provide a more comprehensive understanding than previously possible.

Conclusions:

Understanding the human motor CC's structure and function is advancing rapidly.
Advanced neuroimaging and neurophysiology are key to unraveling its role.
Further research is needed to fully elucidate the motor CC's contribution to interhemispheric motor control.