Abnormal spinal cord morphology Abnormal conus terminalis morphology 2018-07-05T13:09:44Z Abnormal conus medullaris morphology Any structural anomaly of the conus terminalis, which is the distal bulbous part of the spinal cord at the location where the spinal cord tapers and ends (usually between the L1 and L2 lumbar vertebrae). The tapering end of the conus terminalis continues as the filum terminale.