| Term | Definition |
|---|---|
| Encephalo- | Of the Brain |
| Meningo- | Of the Meninges |
| Myelo- | Of the Spinal cord |
| Leuko- | Of the white matter |
| Polio- | Of the gray matter |
| Encephalitis | Inflammation of the brain |
| Meningitis | Inflammation of the Meninges |
| Meningoencephalitis | Inflammation of the brain and meninges |
| Myelitis | Inflammation of the Spinal Cord |
| Ganglioradiculitis | Inflammation of cranial and spinal ganglia and roots |
| Polyradiculoneuritis | Inflammation of multiple spinal or cranial nerve roots |
| Malacia | Necrosis |
| Leukoencephalomalacia | Necrosis of the white matter of the brain |
| Leukomyelomalacia | Necrosis of the white matter in the spinal cord |
| Polioencephalomalacia | Necrosis of the gray matter in the brain |
| Poliomyelomalacia | Necrosis of the gray matter in the spinal cord |
| Astrocytosis | Increased numbers of astrocytes (hyperplasia) |
| Astrogliosis (or gliosis) | Increased numbers of glial fibers |
| Gemistocytes | Highly reactive astrocytes with abundant pink cytoplasm and distinct cell borders |
| Gemistocytic astrocytosis | Astrocytic hyperplasia in which gemistocytic forms predominate |
| Leptomeninges | Pia and arachnoid mater together |
| Pachymeninges | Dura mater |
| Telencephalon | Cerebral hemispheres |
| Diencephalon | Thalamus and hypothalamus |
| Mesencephalon | Midbrain |
| Metencephalon | Cerebellum and pons |
| Myelencephalon | Medulla |