The brain of the cat (Felis domestica). 1. Preliminary account of the gross anatomy / by Burt G. Wilder.

  • Wilder, Burt G. (Burt Green), 1841-1925.
Date:
[1881]
Catalogue details

Licence: Public Domain Mark

Credit: The brain of the cat (Felis domestica). 1. Preliminary account of the gross anatomy / by Burt G. Wilder. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    shown here as a nearly regular circular spot; in reality, it presents a slight mesal extension at both tlie dorsal and ventral sides. Indeed, when care- fully examined, the so -called “aqumductus sjdvii ” is far from being a per- fectly simple and uniform tube ; its form in man is indicated in Reichert’s fig. 31 (A, taf. 4). Among the lower mammals it is usually larger, and with the lower vertebrates it often has the proportions of a true coelia, with lateral extensions. The cimMa {cmb.) is partly seen on the right. The (jeniculata {pgn. and prgn.) do not project as far as they should. The ojitici are wholly hidden fi'om view by the prominent (pop.). Fig. 9.—The sinistral aspect of the Mesencephalon and Diencephalon. From preps. 491 and 506. Enlarged two diameters. The only cut surface shown in this figure is that caused by the oblique transection between the dien. and the prosen. ; the plane of section fol- lowed the cephalic border of the Tractiis optic,us (Tr. op.), and corresponds with the Sulcus limitans between the thalamus and the striatum. Crossing the crus {Qr. ch.) just caudad of the postgeniculatum {pgn.) is seen the cimMa {cmb.). The Hervus trocMcaris {N. tr.) had been removed from prep. 506, and was added from prep. 491. Upon this figure should appear the Lemniscus superior and L. inferior, and postbrn,ehium awCi prcebrachium, provided they exist in the cat as distinct parts visible at the surfiice. I have not been able to satisfy myself respecting their exact position and limits in the human brain, and refrain from expressing any opinion concerning them. Fig. 10.—The dorsal aspect of the Diencephalon, including the diatela. From prep. 301, a half grown <5'- The object of this figure is to show the existence of a distinct roof of the diacmlia independent of the velum, which has been removed. Thisd»«ieto (dtl.) presents the appearance of something more than the lining endyma, but its structure has not, so far as I know, been examined. The darker triangular area at the cephalic end of the diatela corresponds with the delta fornicis {dlt.f). Fig. 11.—The Area cruralis, with part of the pons and of the Ar. pre- chlasmatica. Enlarged two diameters. From preps. 506, 425 (nearly adult 9) and 461 So small and so numerous ai’e the parts shown in this figure, that it should have been jmt more enlarged. The Lobi temporales have been divided at dilTorenl levels on the two sides. From the right, only the extremity, or LI. hi/pocampo’, has been removed, and the section of the medicornu {meu) which is here cut very obliquely, is a slightly curved space completely circumscribed by a ner- vous wall. Neither in the cat, nor—contrary to the common belief and the explicit statement in (iuain. A, II, 542, 544—in man, docs the rima or great transverse fissure ’’ extend to the tip of the medicornu. Where the LL hypocampte rests against tlic 'I'ractus opticus {Tr. op.),