. Practical anatomy of the rabbit : an elementary laboratory textbook in mammalian anatomy . Rabbits; Anatomy, Comparative. 274 Anatomy of the By pressing apart the tips of the hemispheres, and removing thc'pineal body, the dorsal surface ot the thalamencephalon will be sufificiently exposed" to make out the following features: (f) The slit-like aperture appearing in the middle line after the removal of the pineal body represents the dorsal portion of the third ventricle (ventricujus tertius) (Fig. 84), the roof of which is formed anteriorly by the superficial portion of the chor
. Practical anatomy of the rabbit : an elementary laboratory textbook in mammalian anatomy . Rabbits; Anatomy, Comparative. 274 Anatomy of the By pressing apart the tips of the hemispheres, and removing thc'pineal body, the dorsal surface ot the thalamencephalon will be sufificiently exposed" to make out the following features: (f) The slit-like aperture appearing in the middle line after the removal of the pineal body represents the dorsal portion of the third ventricle (ventricujus tertius) (Fig. 84), the roof of which is formed anteriorly by the superficial portion of the chorioid plexus (plexus chorioideus), the latter entering the ventricle at this point. (g) The lateral margins of the aperture are largely formed by two minute spindle-shaped masses, one oh either side, the habenulae. Their posterior ends are united by a slender transverse band, the habenular commissure (com- missura habenularum). The fibres ot the commissure are faintly traceable forward, where they form a pair of thin whitish fila- ments (medullary striae), (h) The posterior commissure (commissura posterior) crosses the posterior portion of the roof immediately behind . and below, the habenular commissure, (i) The walls of the third ventricle are formed by the thalami. They are broadly connected by the intermediate mass (massa intermedia), or middle com- missure, "which may be seen from the dorsal surface crossing the cavity, (j) On either Side of the middle line, or of the habenulae, the dorsal portion of the thalamus forms a low, somewhat oval projection, the pulvinar or posterior tubercle. The anterior tubercle of the thalamus is a faint elevation of very small dimensions lying in the angle enclosed between the pulvinar and the anterior portion of the aperture of the third Fig. 84. Diagram, showing the arrangement of the parts of the thalamencephalon as viewed from the dorsal surface, after removal of the pineal body: a., anterior thalamic tubercle; , habe
Size: 1766px × 1415px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectanatomy, bookyear1921
