neuraxis
Pronunciation: NOOR-oh-ak-sis
The central nervous system comprising the brain and spinal cord as a functional unit.
Full Definition
The neuraxis refers to the brain and spinal cord considered together as the central axis of the nervous system. In neurosurgical oncology, this term is particularly important when discussing tumor spread patterns, as certain malignancies can disseminate along cerebrospinal fluid pathways throughout the neuraxis. Craniospinal radiation may be indicated when there is risk of or confirmed neuraxis dissemination. The term emphasizes the continuity between cranial and spinal components of the central nervous system.
Usage
Usage note: Singular form; plural is 'neuraxes' though rarely used. Distinct from 'neural axis' which is more general anatomical term.
In Context
- "MRI of the entire neuraxis was performed to rule out leptomeningeal spread." — Staging workup report
- "Craniospinal irradiation was recommended given the risk of neuraxis dissemination." — Radiation oncology consultation