| The fourth lumbar is divided between the lumbar and sacral plexuses, hence it is called the furcal nerve. |
| Arteries carried in with the pial fold provide the choroid plexuses of the 3rd and lateral ventricles. |
| The ink was all in the muscle, or in some cases had tracked into the vertebral venous plexuses. |
| Cervical and brachial plexuses form a network of primary, interlacing nerves. |
| The two major plexuses consist of ganglia, clusters of nerve cell bodies disposed at more or less regular intervals over the surface of the cylinder. |
| The fourth nerve is also called the furcal nerve because it contributes to both the lumbar and sacral plexuses. |
