. Bulletin of the Massachusetts Department of Mental Diseases . Plate 1. — Frontal section just posterior to the genu corporis callosis. Slightly oblique. Theseptum pellucidum extends between the truncus and rostrum corporis callosi. Lateral to theanterior horns of the ventricles is the stratum subependymale, and on the right the corpusstriatum before its division into the nucleus caudatus and the nucleus lenticularis by thetraversing fiber bundles of the internal capsule. Converging toward the corpus striatumare seen the strands of the corona radiata. The olfactory bulb and tract are folded b
. Bulletin of the Massachusetts Department of Mental Diseases . Plate 1. — Frontal section just posterior to the genu corporis callosis. Slightly oblique. Theseptum pellucidum extends between the truncus and rostrum corporis callosi. Lateral to theanterior horns of the ventricles is the stratum subependymale, and on the right the corpusstriatum before its division into the nucleus caudatus and the nucleus lenticularis by thetraversing fiber bundles of the internal capsule. Converging toward the corpus striatumare seen the strands of the corona radiata. The olfactory bulb and tract are folded backbeneath the section. The increased size of the left ventricle may be X 10 Plates 2 and 3. — Oblique section. Left side shows more anterior level than the right. Theinternal capsule appears dividing the corpus striatum into the now small caudate, and thelenticular nuclei. The latter shows a subdivision into the globus pallidus and the the right ventral to the corpus striatum lies the substantia perforata anterior, on theleft the tuberculum olfactorium. The fibers of the anterior commissure are seen crossingthe ventral part of the globus pallidus on the left, more laterally on the right. Ventral to theseptum pellucidum appear the fiber bundles of the fornix, more prominent on the left. Posterior to the recessus triangularis, rather loosely held to, but distorting, the columnar fornicis,anterior commissure and lamina terminalis is seen the sacular termination of the cyst oc-cupying the base of the third ventricle. The foramen of Monroe is seen on the left. Theincreased size of both lateral ventricles may be noted.
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