This article from Nature Neuroscience critically evaluates Lesion Network Mapping (LNM), a popular neuroimaging technique used to link brain injuries to psychiatric and neurological disorders. The authors highlight a major procedural flaw where diverse conditions like addiction, depression, and epilepsy appear to map onto nearly identical brain circuits. Their mathematical analysis reveals that LNM fundamentally simplifies into a repetitive sampling of the same normative connectivity data, regardless of the specific disease being studied. Consequently, the resulting maps frequently reflect nonspecific properties of the brain's "degree" or overall connectivity rather than unique biological markers. This discovery suggests that many published findings may be methodological artifacts rather than distinct discovery of disorder-specific networks. Ultimately, the study serves as a foundational caution for the neuroscience community, urging the development of more precise analytical tools.

References:

• van den Heuvel M P, Libedinsky I, Quiroz Monnens S, et al. Investigating the methodological foundation of lesion network mapping[J]. Nature Neuroscience, 2026: 1-11.