Only special neuroradiological procedures allow a clear demonstration or exclusion of a traumatic lesion involving or threatening the intraspinal structures. The myelographies are of particular interest. The functional sagittal pneumostratigraphy is the most informative technique, except for the visualization of an avulsion of the plexus. For better selecting the patients for a gas myelography, a scintigraphy of the spinal leptomeningeal bag is very helpful. But the neurological problem may be suspected on the standard X-ray picture. The lateral walls - articular apophyses and the arcus - are well defined. The vascular conditions of the nedk are best appreciated by an arch aortography. A selective study of the carotids and vertebral arteries in functional positions of the head and neck may then proceed.