Di Muzio B, Macori F, Deng F, et al. Interhemispheric fissure. Reference article, Radiopaedia.org (Accessed on 29 Nov 2022) //doi.org/10.53347/rID-35789
DOI:
//doi.org/10.53347/rID-35789
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//radiopaedia.org/articles/35789
rID:
35789
Article created:
23 Apr 2015 by Dr Bruno Di Muzio ◉ ◈
Revisions:
8 times by 7 users - see full revision history
System:
Central Nervous System
Section:
Anatomy
Tag:
refs
Synonyms:
- Medial longitudinal fissure
- Great longitudinal fissure
URL of Article
The interhemispheric fissure, also known as the medial longitudinal fissure, is the deep groove within the midline separating both cerebral hemispheres and containing the falx cerebri. Being a fissure, it also contains CSF as well as some midline branches of the ACA and PCA.
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The surface of the brain, known as the cerebral cortex, is very uneven, characterized by a distinctive pattern of folds or bumps, known as gyri (singular: gyrus), and grooves, known as sulci (singular: sulcus). These gyri and sulci form important landmarks that allow us to separate the brain into functional centers.
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//www.britannica.com/science/fissure-of-RolandoAlternate titles: central fissure, central sulcus, sulcus of Rolando
Learn about this topic in these articles:
structure of cerebral hemispheres
Two major furrows—the central sulcus and the lateral sulcus—divide each cerebral hemisphere into four sections: the frontal, parietal, temporal, and occipital lobes. The central sulcus, also known as the fissure of Rolando, also separates the cortical motor area (which is anterior to the fissure) from the cortical sensory…
Read More…lobes; the central fissure, or fissure of Rolando, between the frontal and parietal lobes, which separates the chief motor and sensory regions of the brain; the calcarine fissure on the occipital lobe, which contains the visual cortex; the parieto-occipital fissure, which separates the parietal and occipital lobes; the transverse fissure,…
Read MoreThe central sulcus, or fissure of Rolando, separates the frontal and parietal lobes, and the deeper lateral sulcus, or fissure of Sylvius, forms the boundary between the temporal lobe and the frontal and parietal lobes.
The cerebral hemispheres are paired structures separated from each other by the longitudinal fissure along the midline. A mid-sagittal cut through the longitudinal fissure is used to produce two hemisected brains.
Each cerebral hemisphere is organized into five lobes: frontal, parietal, occipital, temporal and insula. The limbic system is sometimes given its own area and called the limbic lobe.
Examination of the lateral surface of the brain will reveal the lateral sulcus (the Sylvian fissure). This groove separates the temporal lobe from the parietal lobe.
A less conspicuous groove, the central sulcus (the Rolandic Sulcus), may be found by looking for two parallel gyri extending from the superior margin of the cerebrum down to the lateral fissure. The sulcus separates these parallel gyri and also demarcates the boundary between the frontal and parietal lobes.
On the medial surface of the hemisected brain, the parieto-occipital sulcus separates the occipital lobe from the rest of the brain. The separation is a bit tricky on the lateral surface. Look for the preoccipital notch and connect it in your imagination to the parieto-occipital sulcus on the lateral surface. This imaginary line divides the parietal lobe from the occipital lobe posterior.