Neurol India Close
 

Figure 4: (a) Sagittal and (b) Coronal three-dimensional computed tomographic angiography images showing a normal third part of vertebral artery (VA) with its two redundant loops after it emerges from foramen transversarium of C2 and C1. (c) In atlanto-axial dislocation, the VA stretches and the redundant loops are obliterated (the stretched loop sign)

Figure 4: (a) Sagittal and (b) Coronal three-dimensional computed tomographic angiography images showing a normal third part of vertebral artery (VA) with its two redundant loops after it emerges from foramen transversarium of C2 and C1. (c) In atlanto-axial dislocation, the VA stretches and the redundant loops are obliterated (the stretched loop sign)