The brain of the cat (Felis domestica). 1. Preliminary account of the gross anatomy / by Burt G. Wilder.
- Burt Green Wilder
- Date:
- [1881]
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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![]\[!iltcse and white, prep’s 288, 289. Some details ot the Area pmcMan- matka (tlie region cephalad ot the cluasma) are from 401 and o27 ; of the Ar. j)ostpontilis (the region caudad of tlie ])ons) from 358, 454 and 491, and of the intermediate A. cruralk from 422, 500, and 527. Most of the nerves and cerebral fissures are lettered on the right side, and most of tlie other parts on the left. Some of the left nerves are cut short, and the left iVi trochlaaris is not shown at all. The Lohi olfactorii {LI. ol.), and are made too long, and the hypophysis (hph.) is too short. Attention is called to the following points, chiefly in comparison with the human brain :— The absence of a distinct Badiv intermedia, {Rx. in.) of the Crus olfacto- rium, corresponding with the so-called “middle root of the olfactory nerve ’’ in man. The part so designated upon the plate is apparentl}' only an area, comparatively undifferentiated, between the more or less fibrous tracts forming the Radices mesalis and lateralis. The turning of the Rx. mesalis {Bx. ms.) over the margin of the hrain so as to appear upon the meson. The distinction of the Rx. lateralis {Rx. 1.) into a lateral gray and a mesal white tract, the Limes cir^erea {Lm. cin.) and the Lm. alha. The great extent of the (Zociis) p>rceperforatus {jv'pf.), and its division into a cephalic more prominent portion {Pt. p.), and a caudal depressed portion {Pt. d.). Both portions are “perforated,” but the degree of fur- rowing of the Pt. prominens varies considerably. These furrows exist in some other Carnivora. The width of the hypophysis {hph.), and the crenation of its caudal border, indicating the existence of an ental subspherical mass, which is covered by an ectal layei’, the thinness of which, in the caudal region, permits the contour of the former to be seen. The slight degree of separation of the albicantia {abn.), which are here nearly concealed by the hypopli3'sis, but more tully shown in fig. 12. The distinctness of the cimbia {cmb.), or “tractus transversus j^cduncuh,” which is better seen in fig. 11. The slight extent of the true 2mstperforatus {ppf.) ; the only part which is really “perforated” is a small ti'iangular area just caudad of the albi- cantia, and pai'tly hidden by them. The less caudo-cephalic extension of the pons {pn.) ; this exposes more of the Area intercruralis {Ar. ic.) than in man, and uncovers the trapezium (te'.'), which, in man, is wholly concealed. Connected also with this feature of the pons is the fact that the JV. abducens (A, abd.) passes directly cephalad from its origin a little caudad of the pons, whereas in man it is forced to curve around the caudal border. Finalh*, the A. trigem- inus {N. try.), in place of emerging through the pons as in man, arises wholly caudad of it, although closely applied to its surface. The greater extent of the Ar. cruralis, which maj' be ascribed both to](https://iiif.wellcomecollection.org/image/b22381983_0028.jp2/full/800%2C/0/default.jpg)
