Correction to: Nature Reviews Neurology https://www.nature.com/articles/s41582-020-00436-x. Published online 11 December 2020.

In the version of the article originally published, in the Fig. 5 “Corticospinal tract” section, the labels “Lumbar” and “Thoracic” were mistakenly swapped. This has now been corrected in the HTML and PDF versions of the article.