Biomarkers and measures

Relapses, MRI, disability scores and blood markers: what each one shows and what it misses.

A blood test that shows damage to nerve fibres has moved from research into clinics. This lesson explains what neurofilament light and GFAP measure, how a result is read, and where their limits lie.

The eye is the one place where nerve fibres can be seen directly, and the visual pathway is the easiest to time. This lesson explains optical coherence tomography and evoked potentials, and what they reveal about damage elsewhere in the nervous system.