Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: Opus III: Nervous System: Plexuses: Inferior Rectal (Hemorrhoidal) Nerve

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Illustrated Encyclopedia of Human Anatomic Variation: Opus III: Nervous System: Plexuses

Inferior Rectal (Hemorrhoidal) Nerve

Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed

This nerve arises from S3, S4, and occasionally S2. It may arise from the sacral plexus directly rather than being one of the three terminal branches (inferior rectal, perineal, and dorsal nerve of the clitoris or penis) of the pudendal.

The inferior rectal nerve may pierce the sacrospinous ligament medial to the ischial spine as reported in 20% of body halves.

The inferior rectal nerve may arise in common with the perineal nerve.

References

Cruveilhier, J. (1851) Traité d'Anatomie Descriptive, 3rd ed., G. Doin & Cie., Paris.

Henle, J. (1868) Handbuch der Systematischen Anatomie des Menschen. von Friedrich Veweg und Sohn, Baunschweig.

Jackson, C.M., Ed. (1933) Morris' Human Anatomy, 9th ed., P. Blakiston's Son & Co., Inc., Philadelphia.

Kopsch, F. (1908) Rauber's Lehrbuch der Anatomie des Menschen. Georg Thieme, Leipzig.

Latarjet, A. (1948) Testut's Traité d'Anatomie Humain, 9th ed., G. Doin & Cie., Paris.

Roberts, W.H.B. and W.H. Taylor. (1973) Inferior rectal nerve variations as it relates to pudendal block. Anat. Rec. 177:461-463.

Schaefer, E.A., Symington, J. and T.H. Bryce., Eds. (1915) Quain's Anatomy, 11th ed., Longmans, Green, and Co., London.

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