Human anatomy, including structure and development and practical considerations . thus establishing adouble relation between the lateral geniculate body the occijjital cortex. The Hypothalamus.—Although, strictly regarded according to its develop-mental relations, the diencephalon claims only the posterior or manmiillary part ofthe hyp(Jth:ilamus, it is desirable to consider at this time the deri\ati(jns of the entirehypothalamic subdivision of the fore-brain. Under the above heading will be de-scribed, therefore, the structures lying within or forming the floor and the antericjrwall of t
Human anatomy, including structure and development and practical considerations . thus establishing adouble relation between the lateral geniculate body the occijjital cortex. The Hypothalamus.—Although, strictly regarded according to its develop-mental relations, the diencephalon claims only the posterior or manmiillary part ofthe hyp(Jth:ilamus, it is desirable to consider at this time the deri\ati(jns of the entirehypothalamic subdivision of the fore-brain. Under the above heading will be de-scribed, therefore, the structures lying within or forming the floor and the antericjrwall of the third ventricle, including the subthalamic region. The subthalamic region in its develojjmental relatitjns stands, as it were, as alink connecting the diencc phalon and the mid-brain. The subthalamic region is theupward prolongation tjf the tegmentum of the cerel^ral j)eduncles and occupies, on eachside of the mid-line, the triangular area between the thalamus above and the internalcapsule and its continuation, the crusta of the peduncle, below ( Fig. 974;. It is insepa-. Veluminterpositum Choroid plexus Fornix Pulvinar Lateral geniculate body (leader crosses cut tail of caudate nucleus) Median geniculate body Hippocampus Superior cerebellarpeduncle Frontal section of brain passing through posterior poles of thalami, pineal body and brain-stem. rably blended with the ventral surface of the thalamus, which thus obliquely overliesthe termination of the tegmental or sensory portion of the cerebral stalk. Throughthis area the important thalamocipetal paths of the fillet and of the superior cerebellarpeduncles reach the thalamus, and within it are seen the upper extremities of thechief ganglia of the mid-brain, the substaiitia nigia and the red nucleus, and a newmass of gray matter, the corpus subthalamicum. The substantia nigra ])resents thesame characteristics here as in the peduncle, being conspicuously dark and overlyingthe crustal fibres. As it ascends, it decreases in bul
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
