An American text-book of the diseases of children .. . ro-sphenoidal lobe. We have still much to learn inthis connection in the pathology of childhood. Tumors of the Basal Ganglia, Lateral Ventricles and Island ofReil, by their encroachment upon the internal capsule, through which so manyimportant tracts pass (see Fig. 3), are prone to give rise to marked and wide-spread symptoms, such as hemiplegia (when anterior part of capsule is affected)and hemianesthesia and hemianopsia (when the posterior part of the capsuleis involved). Other than these no definite localizing symptoms will be notedin c
An American text-book of the diseases of children .. . ro-sphenoidal lobe. We have still much to learn inthis connection in the pathology of childhood. Tumors of the Basal Ganglia, Lateral Ventricles and Island ofReil, by their encroachment upon the internal capsule, through which so manyimportant tracts pass (see Fig. 3), are prone to give rise to marked and wide-spread symptoms, such as hemiplegia (when anterior part of capsule is affected)and hemianesthesia and hemianopsia (when the posterior part of the capsuleis involved). Other than these no definite localizing symptoms will be notedin children. At times other structures (such as the cranial nerves) may beaffected by pressure or distortion by tumors in these regions. Tumors about the Crura Cerebri give rise to a variety of symptomsaccording to the parts affected and the extent of the lesion. The cms containsthe motor and sensory tracts, and the two third nerves (motor oculi) rise fromthe crura very close together (Fig. 4). Thus if one crus is involved, there will Fig. 4. OPTIC NERVE. Fourth NerveFifth Nerve Structures at Base of Brain, to show topography. be complete hemiplegia of the opposite side (occasionally hemianesthesia also),and third-nerve paralysis on the same side (ptosis, etc.). This is called alter-nate or crossed hemiplegia. The optic tract is near at hand also, and if 644 AMERICAN TEXT-BOOK OF DISEASES OF CHILDREN. affected, which is seldom, will give rise to homonymous hemianopsia (probablywith hemiopic pupillary inaction). There may be unilateral the tumor be interpeduncular, some of the symptoms here mentioned will bebilateral. Optic neuritis is apt to develop early in these cases. Tumors of the Quadrigeminal Region are among the rarities. Somefibres of the optic nerve enter the corpora quadrigemina, and the centre for thereflex to light lies in them. Contiguous to them lie the nuclei of all of themotor nerves of the two eyes (third and fourth and fibres of sixth). Notlmagel
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Keywords: ., bookcentury1800, bookdecade189, booksubjectchildren, bookyear1895
