Which exiting nerve roots get affected by a FAR LATERAL (FORAMINAL) herniated disk? (two correct answers)

Correct answers A and C. There are anatomical differences between the cervical and the lumbar spine. In the cervical spine the nerves exit almost horizontally this is why there is no difference in the affected root regardless if the herniation is paracentral or far lateral. This is NOT the case with the lumbar spine where the nerves descend before exiting. This is why a paracentral herniation on the level of L4/L5 would affect the L5 root but a far lateral herniation on the level of L4/L5 would affect the L4 root.  

Correct answers A and C. There are anatomical differences between the cervical and the lumbar spine. In the cervical spine the nerves exit almost horizontally this is why there is no difference in the affected root regardless if the herniation is paracentral or far lateral. This is NOT the case with the lumbar spine where the nerves descend before exiting. This is why a paracentral herniation on the level of L4/L5 would affect the L5 root but a far lateral herniation on the level of L4/L5 would affect the L4 root.