Nerves Formed
All the nerves entering the plexus, with the exception of the third sacral, split into ventral and dorsal divisions, and the nerves arising from these are as follows of the table below:
| Nerve | Segment | Innervated muscles | Cutaneous branches |
|---|---|---|---|
| Superior gluteal | L4-S1 | Gluteus medius Gluteus minimus Tensor fasciae latae |
|
| Inferior gluteal | L5-S2 | Gluteus maximus | |
| Posterior cutaneous femoral | S1-S3 |
Posterior cutaneous femoral
|
|
| Direct branches from plexus | |||
|
S1-2 | Piriformis | |
|
L5-S1 | Obturator internus | |
|
L5-S1 | Quadratus femoris | |
| Sciatic | |||
| Sciatic | L4-S3 | Semitendinosus (Tib) Semimembranosus (Tib) Biceps femoris
Adductor magnus (medial part, Tib) |
|
| Common fibular | L4-S2 | Lateral sural cutaneous Communicating fibular |
|
|
Peroneus longus Peroneus brevis |
Medial dorsal cutaneous Intermediate dorsal cutaneous |
|
|
Tibialis anterior Extensor digitorum longus Extensor digitorum brevis Extensor hallucis longus Extensor hallucis brevis Peroneus tertius |
Lateral cutaneous nerve of big toe Intermediate dorsal cutaneous |
|
| Tibial nerve | L4-S3 | Triceps surae Plantaris Popliteus Tibialis posterior Flexor digitorum longus Flexor hallucis longus |
Medial sural cutaneous Lateral calcaneal Medial calcaneal Lateral dorsal cutaneous |
|
Abductor hallucis Flexor digitorum brevis Flexor hallucis brevis (medial head) Lumbrical (first and second) |
Proper digital plantar | |
|
Flexor hallucis brevis (lateral head) Quadratus plantae Abductor digiti minimi Flexor digiti minimi Lumbrical (third and fourth) Plantar interossei (first to third) Dorsal interossei (first to fifth) Adductor hallucis |
Proper plantar digital | |
| Pudendal and coccygeal | |||
| Pudendal (Pudendal plexus) |
S2-S4 | Muscles of the pelvic floor: Levator ani Superficial transverse perineal Deep transverse perineal Bulbospongiosus Ischiocavernosus Sphincter anus externus Urethral sphincter |
Inferior rectal Perineal
|
| Coccygeal (Coccygeal plexus) |
S5-Co1 | Coccygeus | Anococcygeal Dorsal branches |
Read more about this topic: Sacral Plexus
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