subarachnoid fissure anterior median fissure of spinal cord UBERON:0035319 Wikipedia:Anterior_median_fissure_of_spinal_cord ventral median fissure of spinal cord FMA:83735 SCTID:314225000 NCIT:C32096 UMLS:C1744548 fissura mediana anterior medullae spinalis A fissure in the midline of the anterior surface of the spinal cord.