ABSTRACT
GW32 in the sagittal plane in Part V; GW30 in the horizontal plane in Part VI; GW29 in the coronal plane in Part VII; GW26 in the sagittal plane in Part VIII; and GW26 in the horizontal plane in Part IX. Selected coronal plates are presented in order from rostral to caudal; the dorsal part of each section is always toward the top of the page, the ventral part at the bottom, and the midline is in the vertical center of each section. Sagittal plates are ordered from medial to lateral; the anterior part of each section is always facing to the left, posterior to the right. Horizontal plates are ordered from dorsal to ventral; the anterior part of each section is always facing to the left, posterior to the right, and the midline is in the horizontal center of each section. Each Part contains low magnification plates and high magnification companion plates. The low magnification plates appear on single pages that show unlabeled full contrast photos of entire sections on the left side and low contrast copies on the right with superimposed outlines and unabbreviated labels. The main purpose of the low magnification plates is to identify the large structures of the brain, such as the various lobes and gyri of the cerebral cortex, and large subdivisions of the brain core, such as the basal ganglia, thalamus, hypothalamus, midbrain, pons, cerebellum, and medulla. The high magnification companion plates are designated as A and B on facing pages and feature enlarged views of the brain core. The A part of each plate on the left page shows the full contrast photograph without labels; the B part shows low contrast copies of the same photograph on the right page with superimposed outlines of structures and unabbreviated labels. The main purpose of these plates is to identify smaller structures within the brain core. In addition, every coronally-sectioned specimen contains high magnification plates of the cortical plate in different areas of the cerebral cortex, and every sagittally-sectioned specimen contains high magnification plates of different lobules of the cerebellar cortex in the midline vermis. Because our emphasis is on development, transient structures that appear only in immature brains are labeled in italics, either directly in some of the high magnification plates or in bold numbers that refer to italicized labels in a Table. During dissection, embedding, cutting, and staining, some of the sections illustrated were torn; that damage is usually surrounded by dashed lines. Finally, an alphabetized Glossary gives brief definitions of most
labels used in the Plates with expanded definitions of all transient developmental structures.
