Diseases of the nervous system : a text-book of neurology and psychiatry . aybe presented. Again it is very irregular in its manifestations, althoughcertain features form the background of the disorder. These chieffeatures are: (1) a peculiar dissociation of the sensory impulses; (2)muscular atrophy and other trophic disturbances, affecting chiefly theskin and joints; (3) motor disturbances either irritative or paretic incharacter. Not all of the cases show these symptoms, but inasmuchas the cavity formation is apt to occupy certain portions of the cordmore often than others, this grouping of
Diseases of the nervous system : a text-book of neurology and psychiatry . aybe presented. Again it is very irregular in its manifestations, althoughcertain features form the background of the disorder. These chieffeatures are: (1) a peculiar dissociation of the sensory impulses; (2)muscular atrophy and other trophic disturbances, affecting chiefly theskin and joints; (3) motor disturbances either irritative or paretic incharacter. Not all of the cases show these symptoms, but inasmuchas the cavity formation is apt to occupy certain portions of the cordmore often than others, this grouping of symptoms occurs more oftenthan other groupings. 1. Sensory Dissociation (Kahler, Schultze).—This consists in a lossof ability to recognize sensations of heat and cold and sensations ofpain but without any loss of touch, especially of epicritic touch. SYRINGOMYELIA 357 This dissociation varies considerably. It may be absent. In onepatient or in one area the thermo-anesthesia is very profound, the lossof pain sense less so—again, in others, the reverse is true. In the. Fig. 183.—SjTingomyelic cavity in the cord (cervical region).
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