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Definition: the longitudinal groove in the midline of the anterior aspect of the medulla oblongata; it is the medullary equivalent of the anterior median fissure of the spinal cord and ends at the foramen cecum posterius; its caudal part is obliterated by the decussation of the pyramids.
Synonym(s): fissura mediana anterior medullae oblongataeTA, anteromedian groove1
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