Cerebral hemisphere
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There areThe two cerebral hemispheres, are divided in the midline in the sagittalmidsagittal plane by the interhemispheric fissure. Together they fill most the intra-cranial cavity.
Gross anatomy
The medial surface of each cerebral hemisphere is flat, the inferior surface is irregular and even slightly concave anteriorly, while the lateral surface is convex. They are all lined by cerebral cortex.
The surface of the cerebral hemisphere is divided by grooves, called sulci, into ridges called gyri.
Each cerebral hemisphere is divided into four lobes of unequal size 4:
- frontal lobe: 41% of total neocortical volume
- temporal lobe: 22%
- parietal lobe: 19%
- occipital lobe: 18%
In addition to these four lobes, some authors refer to the insular cortex as the insular lobe, and the cingulate gyrus with hippocampus as the limbic lobe.
The corpus callosum connects the right and left cerebral hemispheres. They are covered by the meninges.
Relations
- medially: falx cerebri, contralateral cerebral hemisphere
- inferiorly: anterior cranial fossa, middle cranial fossa, tentorium cerebelli
-<p>There are two <strong>cerebral hemispheres</strong>, divided in the midline in the sagittal plane by the interhemispheric fissure. Together they fill most the intra-cranial cavity.</p><h4>Gross anatomy</h4><p>The medial surface of each cerebral hemisphere is flat, the inferior surface is irregular and even slightly concave anteriorly, while the lateral surface is convex. They are all lined by cerebral cortex. </p><p>The surface of the cerebral hemisphere is divided by grooves, called sulci, into ridges called gyri.</p><p>Each cerebral hemisphere is divided into four lobes of unequal size <sup>4</sup>:</p><ul>- +<p>The two <strong>cerebral hemispheres</strong> are divided in the midsagittal plane by the <a href="/articles/interhemispheric-fissure">interhemispheric fissure</a>. Together they fill most the intra-cranial cavity.</p><h4>Gross anatomy</h4><p>The medial surface of each cerebral hemisphere is flat, the inferior surface is irregular and even slightly concave anteriorly, while the lateral surface is convex. They are all lined by cerebral cortex. </p><p>The surface of the cerebral hemisphere is divided by grooves, called sulci, into ridges called gyri.</p><p>Each cerebral hemisphere is divided into four lobes of unequal size <sup>4</sup>:</p><ul>
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