Architecture of the motor cortex in SALS and control samples. Nissl staining of representative SALS samples (D2, D4, D5) and controls (H1, H3, H4) shows the intact architecture of the motor cortex in samples chosen for expression analysis. All samples are shown at identical magnification. Cell layers are color-coded as indicated for sample D2. ML – molecular layer; EGL – external granular layer; EPL – external pyramidal layer; IGL – internal granular layer; IPL – internal pyramidal layer; MFL – multiform layer; WM – white matter. The scale bar indicates 500 μm.