| Abbreviations | Meaning |
 | MN | Median Nerve |
| BI | Brain Injury |
| SNR | Selective Nerve Root [block] |
| NI | Neurological Improvement |
| PPNA | Peak Phrenic Nerve Activity |
| ON | Occipitonuchal; Office Nurse; Olfactory Nucleus; Onlay; Optic Nerve; Orthopedic Nurse; Osteonecrosis; Osteonectin; Overnight |
| PNI | Peripheral Nerve Injury; Postnatal Infection; Prognostic Nutritional Index |
| NP | Nerve Palsy |
| NGC | National Guidelines Clearinghouse [database]; Nerve Guidance Conduit; Nucleus Reticularis Gigantocellularis |
| BD | Brain Damage |
| MBEC | Mouse Brain Endothelial Cell |
| AOBS | Acute Organic Brain Syndrome |
| MEB | Medical Evaluation Board; Muscle-eye-brain [disease] |
| MB | Megabase; Megabit; Million Bases; Mouse Brain; Myoglobin |
| OBS | Obesity; Obstetrical Service; Organic Brain Syndrome |
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