| A | B |
| Tumor | The abnormal growth of cells |
| Seizure | A convulsive action caused by disorganized brain activity |
| Paralysis | A loss of ability to move a part of the body caused by injury to the spinal cord of nerve or muscle damage |
| Meningitis | An inflammation of the membranes around the brain and spinal cord. Caused by bacterial or viral infection. A vaccine helps |
| Encephalitis | The inflamation of the brain. Caused by viral infection of central nervous system |
| Polio | A highly contagious viral infection that attacks the central nervous system |
| Epilepsy | Sudden surges of electrical impulses in the brain. May cause violent shaking |
| Insomnia | The inability to fall or stay asleep. Caused by worry, stree, depression, etc. |
| Narcolpysy | Always want to sleep and loss of muscle tone. Genetic disorder |
| Sleep Apnea | A condition in which breathing stops sometimes during sleep. Caused by blockage of the upper air way |
| Migraine | A severe headach. Caused by changes in blood vessels or brain. |
| Concussion | A brief loss of consciousness after a hard blow to the head. |
| Contusion | A bruise, which is a collection of blood in |
| Degenerative disorders: | Disorders caused by progressive detereriation of vital tissues |
| Multiple sclerosis | A diesase in which the tissue that surrounds and protects nerve fibers is destroyed |
| Cerebral Palsy | Brain injury during birth |
| Coma | Severe damage to the head. Person can not be awakened. |