Quain's elements of anatomy . ring Fig. 729.—Outline op a Fig. 729. LONGITUDINAL SECTION THROUGH THE BRAIN OFA CHICK OF TEN DATS. (After Mihalkovics.) h, cerebral hemisphere ; olf,oKactory lobe and nerve ; st,corpus striatum ; Iv, lateralventricle; ac, anterior com-missure ; It, lamina terminalis;ope, optic commissure ; pit,pituitary gland ; inf, inf undi-bulum; cai, internal carotidartery ; v^, third ventricle ;ch?, choroid plexus of third ventricle ; pin, pineal gland; Ijg, corpora bigemina; amv, anterior medullary velum ;below -n-hich two last references are the aqueduct of Sylvius and crur
Quain's elements of anatomy . ring Fig. 729.—Outline op a Fig. 729. LONGITUDINAL SECTION THROUGH THE BRAIN OFA CHICK OF TEN DATS. (After Mihalkovics.) h, cerebral hemisphere ; olf,oKactory lobe and nerve ; st,corpus striatum ; Iv, lateralventricle; ac, anterior com-missure ; It, lamina terminalis;ope, optic commissure ; pit,pituitary gland ; inf, inf undi-bulum; cai, internal carotidartery ; v^, third ventricle ;ch?, choroid plexus of third ventricle ; pin, pineal gland; Ijg, corpora bigemina; amv, anterior medullary velum ;below -n-hich two last references are the aqueduct of Sylvius and crura cerebri ; cbl, cere-bellum ; !??*, fourth ventricle ; ia, basilar artery ; j;s, pons Varolii; cli*, choroid plexiisof thefourth ventricle ; oil, medulla oblongata ; r, roof of fourth ventricle. the notice of the development of the several parts forming the fuU-gTown organ, and which may in tliis association be shortly enumeratedas follows, viz.:— 1. The cerebral hemispheres, with then- ventricular hollows or lateral. <eaz 826 THE NERVOUS SYSTEM. ventricles, the corpora striata, and the olfactory lobes,—a set of partsto which, as a whole, the name of pocerebrimi qx p-osenceiilialon may begiven. 2. The iluilcmienceplialon with its cavity or third ventricle, the primaryocular pedicles, and the infundibukim. 3. The mesencephalon, which is the same with the original middlevesicle, and comprises the corpora quadrigeraina and crura cerebri withits contracted internal hollow, the iter a tertio ad quartum ventriculumof human anatomy. 4. The next part in succession is the cerehelhim, along with which isincluderl the pons Varolii and part of the fourth ventricle. 5. The hinder part, which passes into the spinal marrow, is themedulla oblongata, with the remainder of the fourth ventricle and itscontinuation into the central spinal canal. Fig. 730.—Sketches of the primitive partsOF THE HUMAN BRAIN. (From KiilUker.)1, 2, and 3 are from the human embryo ofabout seven weeks. 1, vie
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