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This fMRI technique promised to transform brain research — why can no one replicate it?

Coloured functional magnetic resonance imaging (fMRI) scan of a healthy human brain at rest.

Coloured functional magnetic resonance imaging of a healthy brain at rest. Credit: Mark & Mary Stevens Neuroimaging and Informatics Institute/Science Photo Library

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Updates & Corrections

  • Correction 16 April 2024: An earlier version of this article incorrectly described the specific number of mice involved in one of Kim’s analyses — it was one mouse.

  • Clarification 16 April 2024: An earlier version of this story did not make clear what was causing the fluctuation in the MRI signal.


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