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The cerebrospinal nerves consist of numerous nerve fibers collected together and enclosed in membranous sheaths. A small bundle of fibers, enclosed in a tubular sheath, is called a funiculus; if the nerve is of small size, it may consist only of a single funiculus; but if large, the funiculi are collected together into larger bundles or fasciculi, which are bound together in a common membranous investment.

Examples include:

• • Anterior funiculus of the spinal cord
  • Lateral funiculus of the spinal cord
  • Posterior funiculus of the spinal cord
  • Funiculus solitarius of the medulla
  • Funiculus separans

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.