segmental medullary artery segmental medullary artery each segmental medullary artery is a branch of the cervical part of the vertebral artery. these small branches penetrate into the vertebral bone through small openings such as the intervertebral foramina. these segmental arteries provide blood flow to the surface and inside the spinal canal at each segmental level. segmental medullary artery1: posterior spinal vein2: anterior spinal vein3: posterolateral spinal vein4: radicular (or segmental medullary) vein5: posterior spinal arteries6: anterior spinal artery7: radicular arterydetailsbranchesanterior spinal arteryidentifierslatinarteria medullaris segmentalista98a12.2.11.016 a12.2.08.007 a12.2.12.007ta24535fma86039anatomical terminology the largest anterior segmental medullary artery is also known as the artery of adamkiewicz. they can join the anterior spinal artery. the existence of a great posterior radiculomedullary artery has recently been confirmed by mexican neuroanatomist victor hugo pérez pérez. gallery great posterior radiculomedullary artery as seen in the posterior surface of the spinal cord