Fissure

In anatomy, a fissure (Latin fissura, plural fissurae) is a groove, natural division, deep furrow, elongated cleft, or tear in various parts of the body also generally called a sulcus, or in the brain a sulcus.

Types

Brain

  • Broca's fissure: found in the third left frontal fold of the brain.
  • Burdach's fissure: connects the brain's insula and the inner surface of the operculum.
  • Calcarin's fissure: extends from the occipital of the cerebrum to the occipital fissure.
  • Callosomarginal fissure: found in the mesial surface of the cerebrum.
  • Central sulcus or Rolando's fissure: separates the brain's frontal and parietal lobes.
  • Clevenger's fissure: found in the inferior temporal lobe of the brain
  • Collateral fissure: found in the inferior surface of the cerebrum.
  • Fissure of Bichat: found below the corpus callosum in the cerebellum of the brain.
  • Fissure of Sylvius: separates the frontal and parietal lobes of the brain from the temporal lobe.
  • Hippocampal sulcus: a sulcus that extends from the brain's corpus callosum to the tip of the temporal lobe.
  • Horizontal fissure or Transverse fissure: found between the cerebrum and the cerebellum. Note that a "transverse fissure" can also be found in the liver and lungs.
  • Medial longitudinal fissure or Longitudinal fissure: which divides the cerebrum into the two hemispheres.
  • Occipitoparietal fissure: found between the occipital and parietal lobes of the brain.
  • Wernicke's fissure: separates the brain's temporal and parietal lobes from the occipital lobe.
  • Zygal fissure: found in the cerebrum.

Liver

Lung

Skull

Other types

Abnormal fissure

Fissure can also refer to an unnatural tract or ulcer, most commonly found in the anus and called an anal fissure.

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