A manual of anatomy . achside by the fornix fibers that arise from the cells of the hippocampusand the dentate gyre. As the fornix passes ventral to the corpuscallosum it receives fibers from the medial longitudinal stria?, dorsalto the callosum, that pass to this body and constitute the fibrcBperforantes. While most of the fornix fibers pass to the corpus albi-cans some pass to the ganglion /labeniila (a small nucleus between theepiphysis and the caudal end of the thalamus). 430 THE NERVE SYSTEM The corpus albicans of each side is further connected with the thal-amus and the tegmentum of the
A manual of anatomy . achside by the fornix fibers that arise from the cells of the hippocampusand the dentate gyre. As the fornix passes ventral to the corpuscallosum it receives fibers from the medial longitudinal stria?, dorsalto the callosum, that pass to this body and constitute the fibrcBperforantes. While most of the fornix fibers pass to the corpus albi-cans some pass to the ganglion /labeniila (a small nucleus between theepiphysis and the caudal end of the thalamus). 430 THE NERVE SYSTEM The corpus albicans of each side is further connected with the thal-amus and the tegmentum of the crus cerebri, where there is a smallganglion, the ganglion profundum tegmenti. THE CIRCULATION OF THE BRAIN The arteries (Fig. 312) that supply the brain are the two vertebral{arteries vertebrates) and the two internal carotid arteries {arteriescarotides internee). The latter enter the cranial cavity through the Optic chiasmei Oltatterij bulb Int. carotid artery^nerve cerebral cerebellar laenfirralTi< nerve. 6tJ>nervemftierre Vertebj ^Atit inferiorCeretiel/ar art Spinal cord \ yiV^t inf Ceretellaj-^rr. Fia 312.—The arteries of the base of the brain. {After Sobotta and McMurrich.) carotid canals while the former enter through the foramen vertebral arteries join to form the basilar artery {arteria basilaris)the largest branches of which are the two posterior cerebral arteries{arteries cerebri posteriores). The internal carotid arteries give riseto a branch, the posterior communicating artery, that passes backand anastomoses with the posterior cerebral artery on each front each internal carotid artery gives rise to an anterior cerebralartery {arteria cerebri anterior) which is connected to its fellow on theopposite side across the midline by the anterior communicatingartery. Thus a so-called circle is formed at the base of the braincalled the circle of Willis (circulus arteriosis). VEINS 431 The other branches of each vertebral artery are the fol
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
