FISSURA MEDIANA POATERIOR Meaning and
Definition
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Fissura mediana posterior, also known as the posterior median fissure, is a term used in neuroanatomy to describe a specific anatomical feature present in the spinal cord.
The term "fissura" refers to a narrow and elongated cleft or groove, while "mediana" signifies that it is positioned in the middle. "Posterior" indicates its location at the back part of an organ or structure. Therefore, the fissura mediana posterior can be understood as a long, narrow groove located in the middle and towards the posterior aspect of the spinal cord.
This anatomical feature divides the spinal cord lengthwise into two equal halves. It runs longitudinally along the ventral surface of the posterior part of the spinal cord, extending from the obex located at the level of the fourth ventricle in the medulla oblongata to the conus medullaris, which is the tapered end of the spinal cord around the level of the first or second lumbar vertebra.
The fissura mediana posterior is formed by a groove-like depression on the surface of the spinal cord, marking the midline. It is a boundary that plays a crucial role in anatomical descriptions and helps in identifying other structures in the spinal cord. This structure is of particular importance for neurosurgeons and neurologists as it aids in locating and differentiating various elements within the spinal cord during diagnostic procedures and surgical interventions.
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(1) The posterior median fissure of the medulla oblongata occupying the lower half of the medulla and terminating at the lower point of the fossa rhomboidalis; (2) sulcus medianus posterior.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for FISSURA MEDIANA POATERIOR
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