Dictionary > Medial longitudinal fissure

Medial longitudinal fissure

Definition
noun
A median fissure separating the two hemispheres of the vertebrate brain
Supplement
The cerebrum of vertebrates, including humans, is divided by two hemispheres referred to as left and right cerebral hemispheres. A fissure exists between the two hemispheres and is referred to as median longitudinal fissure.
The median longitudinal fissure is a deep groove in between the two hemispheres. It is also called cerebral fissure or interhemispheric fissure. It is also referred to as simply longitudinal fissure. The falx celebri (or cerebral fals), a fold of the dura mater, covers it. Beneath this fissure is a corpus callosum. The corpus callosum (also called callosal commissure) is a bundle of commissural fibers that spans part of the median longitudinal fissure, and allows communication between the left and the right cerebral hemispheres.
The median longitudinal fissure should not be confused with another major groove in the brain, the central sulcus. The central sulcus is a fold in the cerebral cortex in vertebrate brain. It separates the parietal lobe from the frontal lobe and the primary motor cortex from the primary somatosensory cortex. The central sulcus is also called the central fissure or the fissure of Rolando.
Synonym(s):

  • longitudinal fissure
  • cerebral fissure
  • interhemispheric fissure

See also:

  • cerebrum


  • You will also like...

    An artist's depiction of the origin of amphibians
    Amphibians & Early Reptiles

    Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..

    Chromosomes X and Y and Sex Determination
    Chromosomes X and Y and Sex Determination

    This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..

    Still Water Animals
    Still Water Animals

    Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..

    Biological Cell Defense
    Biological Cell Defense

    Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..

    Wart-like leaf galls on grape leaves
    Plant Cell Defense

    Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

    Disturbance on a still water
    Abiotic Factors – Water Conditions

    A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..

    Related Articles...

    No related articles found

    See all Related Topics