Skip to main content

Unfortunately we don't fully support your browser. If you have the option to, please upgrade to a newer version or use Mozilla Firefox, Microsoft Edge, Google Chrome, or Safari 14 or newer. If you are unable to, and need support, please send us your feedback.

Publish with us
Anterior Roots of Sacral Nerves (Left)
Nervous System

Anterior Roots of Sacral Nerves (Left)

Radices anteriores nervorum sacralium

Read more


The anterior (ventral or motor) roots of sacral nerves arise bilaterally from the anterior aspect of the spinal cord as a series of smaller rootlets that merge to form the anterior root.

The anterior roots contain information traveling away from the spinal cord. This consists of all lower motor neuronal axons from these spinal levels. In addition, axons from preganglionic parasympathetic neurons exit the spinal cord via the anterior roots of the second, third, and fourth sacral nerves.

Anterior sacral roots originate near the conus medularis, roughly at the first lumbar vertebral level. They run inferiorly as roots of the cauda equine, towards the sacral foramina. Within the vertebral canal, they merge with the corresponding posterior (dorsal) root, adjacent to a sacral foramen, to form a sacral nerve.

Complete Anatomy
The world's most advanced 3D anatomy platform
Try it for Free

Learn more about this topic from other Elsevier products

Sacral Nerves

ScienceDirect image

The sacral nerves are a set of five spinal nerves that project to the pelvic floor, carrying afferent and efferent fibers for communication between pelvic organs and the central nervous system (CNS).

Explore on ScienceDirectopens in new tab/window

Complete Anatomy

The world's most advanced 3D anatomy platform

Complete Anatomy