The 22nd Amino Acid

Images of the human brain. (A) Five-year-old child in an MRI scanner. (B) Recent noninvasive MRI methods measure the function and structure of a child’s brain. The top row depicts patterns of brain activity indexed by fMRI in three representative axial (Z) slices. The bottom row shows corticospinal white-matter fiber tracts (green) projecting through the same three axial slices measured by DTI.