The morphology and evolutional significance of the pineal body : being part I of a contribution to the study of the epiphysis cerebri with an interpretation of the morphological, physiological and clinical evidence . asmatic eminence;33, post-chiasmatic recess; 36, post-infundibular eminence; 41, supra-optic crest;42, supra-optic recess; 44, telencephalon; 45, tuberculum postero-superius; 46,tubercle of the floor of Schulte; 47, velum transversum. In the latter there is a slight tendency for the evagination tobecome expanded as if to form an end-vesicle. It is, therefore,possible at this time
The morphology and evolutional significance of the pineal body : being part I of a contribution to the study of the epiphysis cerebri with an interpretation of the morphological, physiological and clinical evidence . asmatic eminence;33, post-chiasmatic recess; 36, post-infundibular eminence; 41, supra-optic crest;42, supra-optic recess; 44, telencephalon; 45, tuberculum postero-superius; 46,tubercle of the floor of Schulte; 47, velum transversum. In the latter there is a slight tendency for the evagination tobecome expanded as if to form an end-vesicle. It is, therefore,possible at this time to recognize a stalk and an in this stage nor in any subsequent period of develop-ment is there evidence of a parapineal organ. The paraphysis 46 FREDERICK TILXEY AND LUTHER F. WARREN has not yet made its appearance. In the 50 mm. embryo, how-ever, the paraphyseal milage is present and the pineal organhas become still further elongated. The tendency toward expansion of the dista extremity is notas marked as in the 20 mm. embryo. The pineal organ stillcontains a lumen throughout its entire extent. The expansionof the pineal organ to form an end-sac is again pronounced atthe stage of 70 mm. 4439. 32 13 Fig. 13 Mesial view of forebrain reconstruction of 50 mm. Mustelus. X unshaded area shows the cut surfaces of the reconstruction. According toTilney, 1915. 2, chiasmatic process; •,. cerebellum ; t. diiasm; 7, epiphysis; 13, infundibularprocess; -I, midbrain; 2~>, iiiaiiimillary region; 3:2, post-chiasmatic eminence(lobus-inferior)J .53, post-chiasmatic recess (recess of inferior lobe); 3(1, post-infundibular evaginat ion; 3(.l, paraphysis; 10, recess of infundibular process; ic crest ; IJ. supra-opt ic recess : 1 I. telencephalon ; 17, velum trans versum. THE PINEAL BODY 47 The sac is hollow and in communication with the ventricle bymeans of a slender, hollow stalk. A proximal portion may nowbe distinguished so that all three elements of th
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1919
