Figure 1. Brain MRI: axial FLAIR (a) and T2-weighted imaging (b) showing asymmetrical temporal lobe atrophy more pronounced on the left. Axial FLAIR (c) and coronal T2-weighted imaging (d) revealing hyperintensity in the posterior limb of the internal capsule and corticospinal tracts (white *). Axial T2 GRE (e) showing iron deposition (loss of signal) in the premotor cortex, most notably in the left precentral gyrus, known as the “motor band sign” (black arrows). MRI: magnetic resonance imaging; FLAIR: fluid-attenuated inversion recovery.
