What are the spinal levels of the pudendal nerve?

What are the spinal levels of the pudendal nerve?

• A. S2-S4
• B. L4-S2
• C. L2-L4
• D. S1-S3

Answer: (A)

The spinal levels involved are S2 through S4. The pudendal nerve is formed from the ventral rami of these sacral nerves and carries both motor and sensory fibers to the perineal region. It exits the pelvis through the greater sciatic foramen, wraps around the sacrospinous ligament near the ischial spine, and re-enters via the lesser sciatic foramen into Alcock’s canal to supply perineal muscles and skin, including the external anal sphincter and external genitalia. Because its root contributions are specifically S2–S4, the other options that omit S2–S4 or add incorrect levels do not fit.

The spinal levels involved are S2 through S4. The pudendal nerve is formed from the ventral rami of these sacral nerves and carries both motor and sensory fibers to the perineal region. It exits the pelvis through the greater sciatic foramen, wraps around the sacrospinous ligament near the ischial spine, and re-enters via the lesser sciatic foramen into Alcock’s canal to supply perineal muscles and skin, including the external anal sphincter and external genitalia. Because its root contributions are specifically S2–S4, the other options that omit S2–S4 or add incorrect levels do not fit.