| Term | Definition |
| Afferent Nerves | Conduct impulses towards a specific site |
| Analgesia | without pain |
| Analgesics | agents which inhibit pain |
| anesthesia | without feeling |
| ANS | Autonomic Nervous System |
| Anticonvulsant | suppresses seizures |
| Arteriosclerosis | Hardening of the arteries |
| Ataxis | Irregularity of movement due to lack of muscle |
| Axon | a long single projection that transmits impulses from cell body |
| Brain Stem | Major section of the brain that serves as a pathway for impulse conduction between the brain and the spinal cord |
| Catatonic | Abnormal mental state |
| Cerebellar | pertaining to cerebellum |
| Cerebellum | Second largest portion of the brain, occupies the back of the brain |
| Cerebrum | largest and upper most portion of the brain |
| Cisternal Puncture | a spinal puncture at the base of the brain |
| Coma | Abnormal deep unconsciousness |
| Concussion | Injury to the brain resulting from an impact with an object |
| Convulsion | Onset of involuntary muscle contractions |
| CP | Cerebral Palsy |
| Cordectomy | removal of part of the spinal cord |
| craniotomy | incision of the skull |
| CRYOSURGERY | SURGERY USING EXTREME COLD TO DESTROY CELLS |
| CSF | CEREBROSPINAL FLUID |
| CVA | CEREBROVASCULAR ACCIDENT |
| DEPRHYTHMIA | ELECTRICAL DISTURBANCE IN THE BRAIN |
| DURA MATER | OUTERMOST BRAIN COVERING |
| DYSTROPHY | POOR DEVELOPMENT |
| EFFERENT NERVE | ALSO KNOWN AS MOTOR NERVES |
| ENCEPHALALITIS | INFLAMMATION OF THE BRAIN |
| ENCEPHALOPUNCTURE | PUNCTURE INTO BRAIN SUBSTANCE |
| EPILEPSY | NERVOUS DISEASE CHARACTERIZED BY SEIZURES |
| EST | ELECTRIC SHOCK THERAPY |
| GANGLIONECTOMY | EXCISION OF A GANGLION |
| GRAND MAL | SERIOUS FORM OF EPILEPTIC SEIZURE |
| HEMIPARESIS | PARTIAL/INCOMPLETE PARALYSIS |
| IDIOPATHIC | OCCURING WTHOUT A KNOWN CAUSE |
| LAMINECTOMY | EXCISION OF LAMINA TO RELIEVE PRESSURE ON THE SPINAL NERVES |
| LETHARGY | SLUGGISHNESS |
| LP | LUMBAR PUNCTURE |
| MENINGOCELE | HERNIATION OF THE BRAIN COVERING |
| microcephaly | extremely small head |
| MIXED NERVES | NERVES COMPOSED OF BOTH SENSORY AND MOTOR FIBERS |
| MOTOR NERVES | CONDUCT IMPULSES AWAY FROM THE CENTRAL NERVOUS SYSTEM |
| MULTIPLE SCLEROSIS | DEGENERATIVE DISEASE CHARACTERIZED BY TREMORS, MUSCLE WEAKNESS, AND SLOW MOVEMENT |
| MYELALGIA | PAIN IN THE SPINAL CORD |
| MYELOGRAPHY | EXAMINATION OF THE SPINAL CORD AFTER INJECTION OF DYE |
| MYELOPATHY | DISEASE OF THE SPINAL CORD |
| NARCOLEPSY | SLEEPING DISORDER |
| NERVE BLOCK | LOSS OF SENSATION IN A LOCALIZED REGION |
| NEUROLYSIS | SURGICAL FREEING OF A NERVE FROM AN ADHESION |
| NEURON | TYPE OF NERVE CELL RESPONSIBLE FOR IMPULSE CONDUCTION |
| NEUROTRIPSY | CRUSHING OF A NERVE |
| OPIATES | SEDATIVES CONTAINING OPIUM |
| PARAPLEGIA | PARALYSIS OF LOWER BODY |
| PARASYMPATHETIC | ANOTHER ONE OF THE SUBDIVISIONS OF THE NERVOUS SYSTEM |