funiculus (neuroanatomy) funiculus (neuroanatomy) a funiculus or column is a small bundle of axons (nerve fibres), enclosed by the perineurium. a small nerve may consist of a single funiculus, but a larger nerve will have several funiculi collected together into larger bundles known as fascicles. fascicles are bound together in a common membrane, the epineurium. funiculustransverse section of human tibial nerve.identifiersta98a14.1.00.010fma76738anatomical terms of neuroanatomy funiculi in the spinal cord are portions of white matter. examples include: anterior funiculus of the spinal cord lateral funiculus of the spinal cord posterior funiculus of the spinal cord funiculus separans of the rhomboid fossa