The nerve roots at the ends are called cauda
equine. The terminal nerve root tail is the filum terminale. Conus medullaris syndrome and cauda
equine syndrome are complex neurological disorders manifesting as back pain, unilateral or bilateral leg pain, paresthesias and weakness, perineum or saddle anesthesia, rectal and urinary incontinence. Hope this helps. Consult a neurologist for a detailed clinical evaluation if relevant. Take care.