Oct 8, 1989

Organization of afferent and efferent pathways in the pudendal nerve of the female cat

The Journal of Comparative Neurology
K B ThorW C de Groat


Application of horseradish peroxidase to the pudendal nerve in the female cat labelled lumbosacral afferent and efferent neurons and their processes. Afferent axons entered the spinal cord primarily at the S1 and S2 segments and traveled rostrocaudally in Lissauer's tract and the dorsal columns. A distinctive component of the dorsal column projection was located at the lamina I-dorsal column border as a densely labelled, compact bundle that distributed fibers to the dorsal horn at spinal levels near the segments of entry of the afferent axons. Afferent terminal labelling was located in the marginal zone, the intermediate gray matter, and the dorsal gray commissure in the lumbosacral and coccygeal spinal cord. A well-defined terminal field restricted to the S1 and rostral S2 segments was present in the medial third of the nucleus proprius and substantia gelatinosa. Labelled motoneurons in Onuf's nucleus (S1 and S2) exhibited longitudinal dendrites that extended rostrocaudally within the nucleus and three groups of transverse dendrites that emanated periodically from the nucleus and passed to the ventrolateral funiculus, the intermediate gray, and the dorsal gray commissure. Components of the pudendal nerve that innervate the ana...Continue Reading

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  • Citations110


Mentioned in this Paper

Lamina I of Gray Matter of Spinal Cord
Axonal Transport
Dorsal Funiculus
Structure of Posterior Gray Horn of Spinal Cord
Projections and Predictions
Malignant Neoplasm of Spinal Cord
Spinal Nerve Structure
Gray Matter

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