. Quain's elements of anatomy . carine fissure. Thence it extends downwards and forwards, endingbelow in the notch of the uncinate convolution. This fissure corresponds tothe elevation of the hippocampus major in the floor of the lateral ventricle. The internal parido-occipital fissure {par-oc. /.) is a large and deepsulcus which extends downwards and forwards to join the calcarine fis-sure. It assists the calcarine in forming the projection into the lateralventricle known as the calcar avis. The co?Zafera?/?ssMre(occipito-temporal,coZ?./.)is so named fiomthe factthat extending deeply into the
. Quain's elements of anatomy . carine fissure. Thence it extends downwards and forwards, endingbelow in the notch of the uncinate convolution. This fissure corresponds tothe elevation of the hippocampus major in the floor of the lateral ventricle. The internal parido-occipital fissure {par-oc. /.) is a large and deepsulcus which extends downwards and forwards to join the calcarine fis-sure. It assists the calcarine in forming the projection into the lateralventricle known as the calcar avis. The co?Zafera?/?ssMre(occipito-temporal,coZ?./.)is so named fiomthe factthat extending deeply into the substance of the hemisphere it projects inthe descending cornu of the lateral ventricle as the eminentia runs between the superior and inferior occipito-temporal convolutions. The cuneate lobule (occipital lobule) is a wedge-shaped area lying be-tween the internal parieto-occipital and the calcarine fissures. As alreadystated it is the mesial part of the superior occipital convolution. Fig. 297. „. Fig. 297.—CONTOLTJTIONS OF THE MESIAL AND TENTORIAL SURFACES OF THE RIGHT HEMISPHERE. From A SIMPLY CONVOLUTED EUROPEAN BRAIN. About half the naturalsize. (Gowers.) Marg. c, marginal convolution; g. forn., gyrus fornicatus or convolution of thecorpus callosum ; unc. c., uncinate convolution ; i. oc. -temp. c., inferior occipito-temporalconvolution : d. c., dentate convolution ; /. Ro., depression corresponding to the upperextremity of the furrow of Rolando ; /., parieto-occipital fissure ; calc. /., cal-carine fissure ; coU. /., collateral fissure ; d. f., dentate fissure ; t. h., ttenia hippocampi. The quadrate lolule (precuneus) is a four-sided area lying betweenthe internal parieto-occipital fissure behind, and the terminationof the calloso-marginal fissm^e in front. It is variously subdividedinto small gyri, and is continuous above with the superior parietallobule, and below with the gyrus fornicatus. The quadrate lobulebelongs to the par
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