. Anatomy, descriptive and applied. Anatomy. 930 THE NER VE SYSTEM depths of the fimbriodentate fissure, along the dentate gyre, the dentatofasciolar groove intervening, to be continued as the fasciola cinerea (gyrus fasciolaris of lletzius) over the splenium of the corpus callosum. If the hippocampal gyre be depressed for the purpose of examining the depths of the hippocampal fissure, there is revealed a narrow, gray band whose surface is scored by numerous incisures and whose edge is notched at frequent intervals. This corrugated band is the dentate gyre or fascia dentata. Partly overlapping
. Anatomy, descriptive and applied. Anatomy. 930 THE NER VE SYSTEM depths of the fimbriodentate fissure, along the dentate gyre, the dentatofasciolar groove intervening, to be continued as the fasciola cinerea (gyrus fasciolaris of lletzius) over the splenium of the corpus callosum. If the hippocampal gyre be depressed for the purpose of examining the depths of the hippocampal fissure, there is revealed a narrow, gray band whose surface is scored by numerous incisures and whose edge is notched at frequent intervals. This corrugated band is the dentate gyre or fascia dentata. Partly overlapping it, but farther laterad, lies a white band—the fimbria—extending caudad from the uncus to become continued as the Fig. 686.—Trans-section of the hippocampal gyrus, (Edinger.) The dentate gyre is demarcated from the hippocampal gyre by the hippocampal fissure, from the fimbria by the fimbriodentate fissure, in whose depths lies the narrow continuation of the uncus or gyrus intralimbicus—the fasciola cinerea. Extending caudad, and for the most part parallel with the fimbria, it loses its corrugated appearance on approaching the splenium, then fuses with the fasciola cinerea, parting company with the fimbria (which now becomes fornix), to be continued upon the corpus callosum as a thin, broad plate of gray substance— the indusium or gyrus epicallosus. At the uncus the dentate gyre makes an abrupt turn to appear upon the mesal surface, out of the depths of the hippocampal fissure, and encircles the neck of the uncus, forming the frenulum Giacomini. Beyond this point it can be traced, in rare instances, to the gyrus semilunaris. The gyri Andreae Retzii are rudimentary gyral formations consisting of small, rounded, oval or spirally corrugated eminences situated ventrad of the splenium in the angular interval between the dentate and the hippocampal gyres. Struc- turally they have been shown to belong to the hippocampal Please note that these images are
Size: 1532px × 1631px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
