| Root level | Muscles | |
|---|---|---|
| Cervical | C3C4 | Trapezius, Sternocleidomastoid |
| C5C6 | Deltoid, Biceps brachii | |
| C6C7 | Flexor carpi radialis, Pronator teres | |
| C8T1 | Abductor digiti minimi, Abductor pollicis brevis | |
| Thoracic | T7T8 | Upper rectus abdominis |
| T9T10 | Middle rectus abdominis | |
| T11T12 | Lower rectus abdominis | |
| Lumbar | L2L3L4 | Quadriceps femoris |
| L4L5S1 | Tibialis anterior, Gluteus medius | |
| L5S1 | Extensor hallucis longus, Peroneus longus | |
| Sacral | S1S2 | Medial gastrocnemius |
| S2S3S4 | External anal sphincter | |