Illustrations of plasma staining of the mouse somatosensory cortex. (A) Nissl-stained section of the mouse somatosensory cortex. Layers I to VI are indicated on the right-hand side of the image. (B) Autoantibody staining of a section adjacent to the Nissl-stained section depicted in A with plasma from a representative AU subject. There are numerous immunoreactive neurons (arrows) scattered throughout all layers of the cortex. Calibration bar in B = 250 μm and applies to A as well.