The anatomy of the nervous system, from the standpoint of development and function . II! BR W\ i IS of the cerebral hemispheres. These are the cerebral peduncles and they formthe ventral part of the mesencephalon. At it- rostral extremit) each pedunclei> partially encircled by a flattened hand, known as the optic tract, which is continuous through the optic chiasma with the optic nerves. A lozenge-shaped depression, known as the interpeduncular fossa, i> outlined by the divergingcerebral peduncles and by the optic chiasma and tract-. Within the area thu>outlined and beginning at its c
The anatomy of the nervous system, from the standpoint of development and function . II! BR W\ i IS of the cerebral hemispheres. These are the cerebral peduncles and they formthe ventral part of the mesencephalon. At it- rostral extremit) each pedunclei> partially encircled by a flattened hand, known as the optic tract, which is continuous through the optic chiasma with the optic nerves. A lozenge-shaped depression, known as the interpeduncular fossa, i> outlined by the divergingcerebral peduncles and by the optic chiasma and tract-. Within the area thu>outlined and beginning at its caudal angle may he distinguished the following parts: the inter peduncular nucleus, which i- very large in the sheep and OCCU- Longitudinal fissure of cerebrumOptic lurve _Optic chiasmaRkinal fissurt Insula--^Lateral fissure Optic tract . Infundibulum -? Manimillary body - Cerebral pedunchInterpeduncular fossa andnucleus Trigeminal nerve Abduccns nerve-- . ,. [Vestibular nAcoustie] [Cochlear n. Glossopharyngeal tier: -- Vagus nerve Hypoglossal nerve ? Anterior median fissurt. \ Olfactory bulb edial olfactory gyrusinterior perforated •uhstanceLateral olfactory stria?—Lateral olfactory gyrus-—Diagonal band Amygdaloid nucleus Pyriform <irea~j— Hippocampal gyrus-- Trochlear nerce, Abduccns Facial nerve - Trapezoid bodyCerebellum--Olive-Chorioid plexus<ory nerveKTractus lateralis minor Fig. 83.—Ventral view of the sheeps brain. pies an area designated in man as the substantia perforata posterior; the corpusmammillare, which in man is divided by a longitudinal groove into two mani-millary bodies; and also the tuber cinereum, infundibulum, and to the optic tract there is on either side a triangular field of gray matter,studded with minute pit-like depressions and known as the anterior perforatedsubstance. The Rhinencephalon.—The olfactory bulb is situated near the rostral endof the hemisphere, to the ventral surface of which
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
