. Cunningham's Text-book of anatomy. Anatomy. INTEKNAL STKUCTUEE OF THE MESENCEPHALON. oculomotor and the lateral sulci of the mesencephalon, and its medial part is traversed by the emerging fila of the oculomotor nerve. It is not equally thick throughout. Towards the lateral sulcus it becomes thin, whilst it thickens considerably near the medial aspect of the pedunculus cerebri. The surface of the substantia nigra, which is turned towards the tegmentum, is concave and uniform; the opposite surface is convex and rendered irregular by the presence of numerous slender prolongations of the substa
. Cunningham's Text-book of anatomy. Anatomy. INTEKNAL STKUCTUEE OF THE MESENCEPHALON. oculomotor and the lateral sulci of the mesencephalon, and its medial part is traversed by the emerging fila of the oculomotor nerve. It is not equally thick throughout. Towards the lateral sulcus it becomes thin, whilst it thickens considerably near the medial aspect of the pedunculus cerebri. The surface of the substantia nigra, which is turned towards the tegmentum, is concave and uniform; the opposite surface is convex and rendered irregular by the presence of numerous slender prolongations of the substance into the basis pedunculi. The morphological and physiological significance of the substantia nigra is not fully understood, and the connexions established by its cells are imperfectly known. Bechterew, however, is of the opinion that fibres arising in the motor area of the cerebral cortex end in relationship with the cells of the substantia nigra, the axons of which proceed to the motor trigeminal nucleus for the purpose of co- ordinating the muscles of mastication. Colliculi Inferiores (orinferior quadrigeminal bodies).âEach inferiorcolliculus Sulcus cinguli Gyrus cinguli Paracentral area Commissura fornicis Corpus fornicis Corpus callosum Septum pellucidum A^tfjf Sulcus cinguli . _^*PK Paracentral sulcus Sulcus centralis Hippocampal rudiment Incisura sulc. cinguli Gyrus frontalis superior Lamina chorioidea Foramen nterventriculare. Olfactory bulb / /VrK| Corpus paraterminale'' .â¢' / ' Columna fornicis / Olfactory tract *~"v>£^ Fila olfactoria lateralis / ~"*5 Nucleus amygdala; / Piriform area i Thalamus (cut surface) ; Rhinal fissure Cauda fasciae dentata? Hippocampus ulcus praecunei ..Precuneus Sulcus subparietalis Fossa parieto- occipitalis Sulcus paramedialis ..-Area striata ^|k Sulcus "sagittalis cunei ileus itrocalcarinus 'Area striata Sulcus polaris inferior i \ i \ \ Sulcus calcarinus '. i \ V Sulcus sagittalis gyri lingualis i \ 'â Sulcus
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
