. The anatomy of the domestic animals. Veterinary anatomy. THE NERVOUS SYSTEM OF THE OX 837 more than a third of the length of the hemisphere. The pattern of the fissures and gyri of the pallium is somewhat simpler than in the horse. 1. The lateral fissure (of Sylvius) is very deep. Its middle branch extends almost ver- tically upward on the middle of the lateral surface of the hemisphere, and is separated by a gyrus of variable width from the suprasylvian fissure. The anterior branch runs forward about parallel with the sulcus rhinalis anterior, from which it is separated by the short gyri of
. The anatomy of the domestic animals. Veterinary anatomy. THE NERVOUS SYSTEM OF THE OX 837 more than a third of the length of the hemisphere. The pattern of the fissures and gyri of the pallium is somewhat simpler than in the horse. 1. The lateral fissure (of Sylvius) is very deep. Its middle branch extends almost ver- tically upward on the middle of the lateral surface of the hemisphere, and is separated by a gyrus of variable width from the suprasylvian fissure. The anterior branch runs forward about parallel with the sulcus rhinalis anterior, from which it is separated by the short gyri of the insula. The latter are covered to a small extent only by the overhanging gjTi (operculum). The posterior branch may run back a distance of only about cm. and end in T-shaped manner, or it may join the sulcus rhinalis posterior. 2. The suprasylvian fissure is deep and very distinct. It extends in an undulating manner from the lateral sm-face of the occipital pole to the lateral side of the sagittal pole. Here it may nrginal pole. Cere- hfdlutn Olfactory Olfactory Jnfundibulum tract bulb Hypophysis or pituitary body Corpus Pons Medulla trap?- oblongata zoideum Fig. 664.—Brain op ; Right View. Fissures: /.Lateral; ^. 5, suprasylvian: 5. coronal; 4. transverse; o, ectoraarginal; 5, diagonal; ??, posterior ecto- sylvian; 8, presylvian; 9, 9', rhinal {anterior and posterior); , chorioid plexus of fourth ventricle; cerebral peduncle; , piriform lobe; /.insula. Stumps of cranial nerves are designated by Roman numerals. be interrupted or may be continued by the coronal fissure, which descends to the frontal pole and divides into two short branches. 3. The diagonal fissure (S. diagonaUs) begins in front of the stem of the lateral fissure and runs upwai'd and forward. Its form is very variable. 4. The transverse fissure cuts obhquely into the dorsal border in front of the sagittal pole. It is short and dcrp ami commonly communicates with the suprasylvian and co
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