| Abbreviations | Meaning |
 | NRI | Nerve Root Involvement; Nerve Root Irritation; Nonrespiratory Infection |
| DMV | Dorsal Motor Nucleus Of The Vagus Nerve |
| NR | Nerve Root |
| CNI | Center Of Nuclear Image; Chronic Nerve Irritation; Community Nutrition Institute |
| NNP | Neonatal Nurse Practitioner; Nerve Net Pulse |
| NCS | Nerve Conduction Study |
| RNS | Reactive Nitrogen Species; Reference Normal Serum; Repetitive Nerve Stimulation; Replacement Normal Saline [solution]; Ribonuclease |
| C1 | First Cervical Nerve; First Cervical Vertebra; First Component Of Complement |
| PPNA | Peak Phrenic Nerve Activity |
| NLG | Nerve Conduction Velocities |
| PNM | Perinatal Mortality; Peripheral Dysostosis, Nasal Hypoplasia, And Mental Retardation [syndrome]; Peripheral Nerve Myelin |
| PNB | Perineal Needle Biopsy; Peripheral Nerve Block; P-nitrobiphenyl; Premature Nodal Beat |
| PNS | Peripheral Nerve Stimulation |
| S1-S5 | First To Fifth Sacral Nerves |
| N | Nerve |
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