| A | B |
| encephal/o | brain |
| cephal/o | head, crown |
| crani/o | skull |
| cerebell/o | cerebellum (balance and coordination) |
| cerebr/o | cerebrum (thinking part of brain) |
| mening/o, mening/i | meninges (layers around brain and spinal cord) |
| radic/o, radicul/o, rhiz/o | nerve root |
| mon/o | one |
| neur/o | nerve |
| -pathy | disease |
| myel/o | bone marrow or spinal cord |
| sensory organs | ears, eyes, nose, skin, tongue |
| an-, a- | without |
| esthesi/o | feeling |
| -ologist, -iatrist | specialist |
| psych/o | mind, emotions |
| -iatry | field of study |
| conscious | awake, alert, aware, responsive |
| syncopal episode | fainting spell |
| LOC | loss (or level) of consciousness |
| coma | deep state of unconsciousness |
| aneurysm | weak-spot in wall of an artery |
| stroke | damage to brain when blood flow is disrupted |
| TIA | transient ischemic attack; "little" strokes |
| -phasia | speech |
| hyper- | excessive, increased |
| -phagia | to swallow |
| convulsion, -ictal | seizure |
| preictal | time before a seizure |
| -paresis, -plegia | paralysis |
| hemiparesis | paralysis on one side of the body |
| paraplegia | paralysis of both legs and lower body |
| quadriplegia | paralysis of all four extremeties |
| ADD | attention deficit disorder |
| ADHD | attention deficit hyperactivity disorder |
| concussion | violent shaking or jarring of the brain |
| A + O x 3 | alert and oriented times three (person, place, and time) |
| CP | cerebral palsy |
| MS | multiple sclerosis |
| CAT | computer axial tomography |
| PERRLA | pupils are equal, round, responsive to light and accommodation |
| analgesic | drug that relieves pain with affecting consciousness |
| MRI | magnetic resonance imaging |
| EEG | electroencephalogram |
| HA | headache |
| contusion | bruise |
| hematoma | tumor of blood |