Fig. 1From: Cord cross-sectional area at foramen magnum as a correlate of disability in amyotrophic lateral sclerosisa and b Three-dimensional T1-weighted images volume-realigned perpendicularly to the main axis of the cord. Re-oriented axial views at the level of the foramen magnum (c) and at the C2-C3 level (d) depict the medians of five regions of interest for the quantification of cord areaBack to article page