| Altered mental status |
| Abnormal motor examination |
| Abnormal sensory examination |
| Abnormal or absent reflexes |
| Paralysis |
| Neck pain at rest or with isometric neck motion |
| Decreased cervical range of motion |
| Posterior midline cervical tenderness |
| Muscle spasm of cervical muscles |
| Bilateral symptoms |
| Lower extremity symptoms |
| Hypotension with bradycardia (neurogenic shock) |
| Diaphragmatic breathing without retractions |
| Autonomic hyperreflexia |
| Hypothermia or hyperthermia |
