Omar Bennett
The brain's ventricular system is comprised of four ventricles, with the first and second ventricles being lateral ventricles. These C-shaped structures are located beneath the cerebral cortex, the wrinkly outer layer of the brain. The lateral ventricles are filled with cerebrospinal fluid (CSF)> and are separated from each other by a thin vertical sheet of nervous tissue called septum pellucidum.
| Characteristics | Values |
|---|---|
| Shape | C-shaped |
| Location | Beneath the cerebral cortex |
| Symmetry | Usually symmetrical, but between 5% and 12% of the population have one side larger than the other |
| Lining | Ependyma |
| Contents | CSF (cerebrospinal fluid) |
| Capacity | 7 to 10 ml |
| Separation | Thin vertical sheet of nervous tissue called septum pellucidum |
| Communication | Communicates with the third ventricle through the interventricular foramen of Monro |
| Composition | Central part (body) and 3 horns (cornua) |
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What You'll Learn
The first and second ventricles are lateral ventricles
The lateral ventricles are filled with cerebrospinal fluid (CSF) and are separated from each other by a thin vertical sheet of nervous tissue called septum pellucidum. Each of the lateral ventricles is made up of a central part (body) and three horns (cornua): the anterior horn, posterior horn, and inferior horn. On the coronal section, it appears triangular anteriorly and rectangular posteriorly.
The ventricular system of the brain is an interconnected series of cavities filled with CSF that cushions the brain. The presence of cerebral ventricles was known since ancient times, but their function was obscure. Early scientists believed ventricles to be the site of thought, emotions, reasoning, and memory.
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Lateral ventricles are C-shaped cavities
The first and second ventricles are lateral ventricles. These C-shaped cavities are situated within each cerebral hemisphere, beneath the cerebral cortex, the wrinkly outer layer of your brain. They are usually symmetrical, but between 5% and 12% of the population are anatomically different, with one side larger than the other.
The lateral ventricles are lined by ependyma and filled with cerebrospinal fluid (CSF). They have a capacity of 7 to 10 ml. The two lateral ventricles are separated from each other by a thin vertical sheet of nervous tissue called septum pellucidum covered on either side by ependyma. Each of the lateral ventricles is made up of a central part (body) and three horns (cornua) namely the anterior horn, posterior horn, and inferior horn. On the coronal section, it appears triangular anteriorly and rectangular posteriorly.
The lateral ventricles are the largest of the ventricular spaces in the brain. They are best seen in frontal sections, where their ventral surface is usually defined by the basal ganglia, their dorsal surface by the corpus callosum, and their medial surface by the septum pellucidum, a membranous tissue sheet that forms part of the midline sagittal surface of the cerebral hemispheres.
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They are located beneath the cerebral cortex
The first and second ventricles are lateral ventricles. These C-shaped structures are located beneath the cerebral cortex, the wrinkly outer layer of the brain. The lateral ventricles are situated within each cerebral hemisphere and are filled with cerebrospinal fluid (CSF). They are separated from each other by a thin vertical sheet of nervous tissue called septum pellucidum. The lateral ventricles are usually symmetrical, but between 5% and 12% of the population are anatomically different, with one side larger than the other.
The lateral ventricles are the largest of the ventricular spaces in the brain. They are best seen in frontal sections, where their ventral surface is defined by the basal ganglia, their dorsal surface by the corpus callosum, and their medial surface by the septum pellucidum. The septum pellucidum is a membranous tissue sheet that forms part of the midline sagittal surface of the cerebral hemispheres.
Each of the lateral ventricles is made up of a central part (body) and three horns (cornua): the anterior horn, posterior horn, and inferior horn. On the coronal section, it appears triangular anteriorly and rectangular posteriorly. Between the inferior horn and the main body of the ventricle is the putamen, which connects with the globus pallidus. These structures bounding the lateral ventricles form a frame curving around the thalamus.
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Lateral ventricles are separated by a thin sheet of nervous tissue
The first and second ventricles are lateral ventricles. These C-shaped structures are located beneath the cerebral cortex, the wrinkly outer layer of your brain. The lateral ventricles are separated from each other by a thin vertical sheet of nervous tissue called septum pellucidum, covered on either side by ependyma. The septum pellucidum is a membranous tissue sheet that forms part of the midline sagittal surface of the cerebral hemispheres. The lateral ventricles are the largest of the ventricular spaces present in sections through the brain. They are best seen in frontal sections, where their ventral surface is usually defined by the basal ganglia, their dorsal surface by the corpus callosum, and their medial surface by the septum pellucidum.
Each of the lateral ventricles is made up of a central part (body) and three horns (cornua), namely the anterior horn, posterior horn, and inferior horn. On the coronal section, it appears triangular anteriorly and rectangular posteriorly. The lateral ventricles are lined by ependyma and filled with cerebrospinal fluid (CSF). The ventricular system of the brain is an interconnected series of cavities filled with CSF that cushions the brain.
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Lateral ventricles are filled with cerebrospinal fluid (CSF)
The first and second ventricles are lateral ventricles. These C-shaped structures are located beneath the cerebral cortex, the wrinkly outer layer of your brain. The lateral ventricles are filled with cerebrospinal fluid (CSF). They are the largest of the ventricular spaces and are best seen in frontal sections, where their ventral surface is usually defined by the basal ganglia, their dorsal surface by the corpus callosum, and their medial surface by the septum pellucidum, a membranous tissue sheet that forms part of the midline sagittal surface of the cerebral hemispheres. The septum pellucidum is a thin vertical sheet of nervous tissue covered on either side by ependyma. The lateral ventricles are separated from each other by this septum pellucidum.
The lateral ventricles are made up of a central part (body) and three horns (cornua): the anterior horn, posterior horn, and inferior horn. On the coronal section, the lateral ventricles appear triangular anteriorly and rectangular posteriorly. Between the inferior horn and the main body of the ventricle is the putamen, which emerges from the head of the caudate nucleus and sits above the tapetum. A small number of further connections pass through the occipital tapetum to join the putamen to portions of the caudate nucleus tail adjoining the anterior horn. Below the putamen sits the globus pallidus, with which it connects. These structures bounding the lateral ventricles form a frame curving around the thalamus, which itself constitutes the main structure bounding the third ventricle.
The ventricular system of the brain is an interconnected series of cavities filled with CSF that cushions the brain. The function of the ventricles was unknown for a long time, with early scientists believing them to be the site of thought, emotions, reasoning, and memory. It was not until the 17th century that Domenico Felice Antonio Cotugno first described the connection between cerebral ventricles and subarachnoid space, a fact later confirmed by Francis Jean Magendie.
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Frequently asked questions
The first and second ventricles are lateral ventricles.
The first and second ventricles are C-shaped structures.
The first and second ventricles are located beneath the cerebral cortex, the wrinkly outer layer of the brain.
The first and second ventricles have a capacity of 7 to 10 ml.
The first and second ventricles are filled with cerebrospinal fluid (CSF).
