S2 anterior ramus
Roots · S2
Contributes to the sciatic (both divisions), inferior gluteal, posterior femoral cutaneous and pudendal nerves. With S3–S4 it gives off the pelvic splanchnic nerves (parasympathetic).
Detail
- Dermatome
- Posterior thigh and popliteal fossa
- Myotome
- Knee flexion, toe flexion, intrinsic foot muscles
- Autonomic
- Pelvic splanchnics S2–S4: detrusor contraction, rectal emptying, erection
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