Fig. 1From: Cortical pencil lining on SWI MRI in NBIA and healthy agingAge-related iron deposition lining the motor cortex and putamen in 81 healthy subjects. The graph shows the percentage of healthy subjects (Y-axis) per decade of life (X-axis) that exhibit hypointense signals on SWI in (a) the motor cortex and (b) the putamenBack to article page