A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . se (implications of central sen-sory components) obtrudes difficulties but rarelv,while disorders of the optic thalamus should be ex-cluded by reason of the characteristic sensory dis-turbances and central pains b^- which thev areaccompanied. Cerebellopontine Angle Tumors.—These should beincluded in a discussion of cerebellar tumors, by reasonof the symptoms of cerebellar pressure, and of ves-tibular involvement. There are two main types:those of the pia of the cer
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . se (implications of central sen-sory components) obtrudes difficulties but rarelv,while disorders of the optic thalamus should be ex-cluded by reason of the characteristic sensory dis-turbances and central pains b^- which thev areaccompanied. Cerebellopontine Angle Tumors.—These should beincluded in a discussion of cerebellar tumors, by reasonof the symptoms of cerebellar pressure, and of ves-tibular involvement. There are two main types:those of the pia of the cerebellum, and those growingon or about the eighth nerve. They usually take theform of fibromata, myxomata, or sarcomata. The symptoms vary according to the degree ofpressure upon the pons and middle cerebellar and deafness, caused by the early involve-ment of the eighth nerve, soon appear. The typicalgait, the ataxia, homolateral paresis, and hypotonusare caused by pressure on the cerebelhmi, whereas pres-sure on the pyramidal tracts may and usually doesproduce a contralateral paresis giving the usual signs. 1 .... lJl(; of the Fourth Ventricle. of a pyramidal tract involvement. Ptosis may bepresent. Facial palsy is a usual accompaniment, andcorneal anesthesia to trigeminal pain, caused by pres-sure upon the fifth nerve, is of freciuent static tremor and a sense of subjectiverotation toward the side of the lesion are frequent. Tre.^tmext op Cerebellar Tumors—Generali-zation on the question of treatment is useless. Notwo cases act in exactly the same way, and treatmentmust be in accordance with symptoms and localiza-tion. Antisyphilitic treatment is the proper mode ofattack on small gummata. Operation for cystsusually shows good results, and with greater knowl- REFERENCE HANDBOOK OF THE MEDICAL SCIENCES Cerebral IIcniorrhaKe edge of loealizatiim, and better modes of procedurethe results of ojierative interference in cases of
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