. The anatomy of the domestic animals. Veterinary anatomy. THE NERVOUS SYSTEM OF THE DOG 849 The cerebral hemispheres are very broad behind and diminish in width an- teriorly; there is a sudden narrowing at the frontal poles, which are flattened laterally. The tentorial surfaces are concave and form a deep cavity which re- ceives the anterior part of the cerebellum. The arrangement of the fissures and gj-ri is simpler than in the ammals previously examined. The rhipf fissures are as follows: 1. The lateral fissure extends upward and backward from the suk-us rhinahs a little heliind the middl(»
. The anatomy of the domestic animals. Veterinary anatomy. THE NERVOUS SYSTEM OF THE DOG 849 The cerebral hemispheres are very broad behind and diminish in width an- teriorly; there is a sudden narrowing at the frontal poles, which are flattened laterally. The tentorial surfaces are concave and form a deep cavity which re- ceives the anterior part of the cerebellum. The arrangement of the fissures and gj-ri is simpler than in the ammals previously examined. The rhipf fissures are as follows: 1. The lateral fissure extends upward and backward from the suk-us rhinahs a little heliind the middl(» of tlie lateral siu'faee of the hemisphere. 2. The ectosylvian fissure has approximately the shape of an inverted U, and curves over the lateral fissure. It is renariied as consisting of three parts—antrrinr, middle, and posterior (F. ectosylvia antcrinr. media, pustciiur). 3. The suprasylvian fissure lies above and approximatel}' concentric with the preceding. It also consists of three parts—anterior, middle, and posterior. 4. The ectomarginal or collateral fissure runs forward on the dorsal aspect of tlie hemi- sphere almost parallel with the dorso-medial bor- der. A Uttle in front of the middle of the surface it gives off a short ansate fissure (F. ansata) which runs obliquely medially and forward. It is usually continued anteriorly by the coronal fissure, and may be in continuity posteriorly with the medilateral (or post-later;il) fissure. LongUudinal fissure OlfucUmj hulb Frontal yule. Fig. 679.—Braix Stem of Dog; Dorsal View. a, Spinal cord; b, dorsal median groove; c, c', funicu- lus gracilis; c", clava; rf, d', funiculus cuneatus; d", tuber- culum cuneatum; t% funiculus lateralis' e', luberculum cin- ereum; /, medulla oblongata; /, //, ///, fovese of floor of fourth ventricle (fossa rhomboidea); ff, limiting groove; h, median fissure; i, eminentia medialis; k, ala cinera; I, V, pons; m, posterior peduncle, and n, middle peduncle, of cere- bellum (cut);
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectveterinaryanatomy
