Diseases of the nervous system : a text-book of neurology and psychiatry . e. Contralateral Benedicts with choreo-athetoid movements and alternate paralysis of the third(777) nerve by reason of lesion of the right pontine tegmentum. On the left side, contralateral hemianesthesia of the extremities and of the face fromlesion of the secondary crossed sensory pathways (Rm and SR). Choreo-athetoid move-ments and at times tremors from lesion of the red nucleus and of the superior cerebellarpeduncle (Pes) below the decussation. On the right side paralysis of the third nerve (
Diseases of the nervous system : a text-book of neurology and psychiatry . e. Contralateral Benedicts with choreo-athetoid movements and alternate paralysis of the third(777) nerve by reason of lesion of the right pontine tegmentum. On the left side, contralateral hemianesthesia of the extremities and of the face fromlesion of the secondary crossed sensory pathways (Rm and SR). Choreo-athetoid move-ments and at times tremors from lesion of the red nucleus and of the superior cerebellarpeduncle (Pes) below the decussation. On the right side paralysis of the third nerve (III), with ptosis, external strabismus(non-resistance to external rectus), with or without mydriasis and pupils immobile tolight and convergence, depending on the extent of the lesion of the root fibers of theoculomotorius (777). (Dejerine.) (See Chart, No. 6, p. 390.) pressure algometer may be raised on the analgesic side. In the sameway the affected area of the body may be insensitive to all degrees ofheat, and to all stimuli capable of evoking normally a sensation of. PONTINE SYNDROMES 387 cold. Here, however, in the bulb, in distinction to lesions of the cord,the grosser form of pain and discomfort may traverse other paths ifthe usual ones are closed, whereas in the cord all painful impulses areblocked by a unifocal lesion. In the bulb, moreover, all three forms of sensibility may be affectedtogether or any one may escape or be alone involved. These impulses of pain, heat, and cold all run up in the neighborhoodof the fifth nerve nucleus, and in cases of occlusion of the posteriorinferior cerebellar artery the paths are usually implicated. This sameaccident may occasion a dissociation of the impulses underlying theappreciation of posture and passive movement from those concernedwith spatial discrimination. A summary of the findings which may occur in the lesions whichcut off the sensory pathways between the nuclei of the posteriorcolumns and the optic thalamus has been stat
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