The anatomy of the nervous system, from the standpoint of development and function . ose, mouth, and tongue andhe concerned with feeding reflexes. The pineal body is a small mass, shaped like a fir cone, which re>ts upon themesencephalon in the interval between the two thalami. Its base is attachedby a short stalk to the habenular and posterior commissures, and into the stalkthere extends the small pineal recess of the third ventricle. The pineal body i-a rudimentary structure and is not composed of nervous elements. In some Posterior com m issunPirn ill bodySplcnium of corpus callosum -Lam
The anatomy of the nervous system, from the standpoint of development and function . ose, mouth, and tongue andhe concerned with feeding reflexes. The pineal body is a small mass, shaped like a fir cone, which re>ts upon themesencephalon in the interval between the two thalami. Its base is attachedby a short stalk to the habenular and posterior commissures, and into the stalkthere extends the small pineal recess of the third ventricle. The pineal body i-a rudimentary structure and is not composed of nervous elements. In some Posterior com m issunPirn ill bodySplcnium of corpus callosum -Lamina quadrigemina x \Ccnhrai aqueduct s \Anterior medullary velum s \ FourUi ventricle ^Sup. verm, of cerebellum „Fissura prima . £ L >: Inferior vermis ,,- Mof cerebellum Hypothermic sulcus , Body of fornix IIabeu ula ^ \ , Chorioidplexus of third ventricle Habenular commissure l i i / Massa intermediaSuprapineal recess \ • / / Epithelial roof of third ventricle I i Lamina commissures hippocampi( Corpus col I os urn Epithelial roof and chori-oid plexus of fourth-ventricle. Genu of corpus callosum /-^„ Septum pclluci- dum^-~ callosumLamina rostral is„ Columna fornicis- • Interventricular foramen«^v Anterior commissureN,/Lamina terminalis*-COptic recess^^ Optic chiasma^^Infundibulum\ \ \ \ Hypophysis» \ \ Mammillary body * * Oculomotor nerve \ \ ySi<bthalamus\ Tegmentum of mesencephalonPons- Medulla *-Central canalFig. 158.—Median sagittal section through the human brain stem. vertebrates, certain lizards for example, it is more highly developed, resemblesin structure an invertebrate eye, and lies close to the dorsal surface of the posterior commissure is a large bundle of fibers which crosses the medianplane dorsal to the point where the cerebral aqueduct opens into the thirdventricle (Figs. 154, 156). The source and termination of the fibers whichconstitute the bundle are still obscure. 222 THE NERVOUS SYSTEM THE HYPOTHALAMUS The hypotha
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
