. Medical diagnosis for the student and practitioner. taxia or spastic ataxia according to the type of motor defectpresent. Even the dynamic ataxia may be found extremely complex if oneanalyzes the several factors which enter into or intensify it, , lost cen- Static ataxia. Motor ataxia. Cerebellarataxia. I208 MEDICAL DIAGNOSIS tripetal of deep sensory impulses from the muscles, bones and joints, cutan-eous anesthesia and impaired muscle-tonus being most important. Ordinary ataxia indicates cortical lesions or those of the pons crura andcorpora quadrigemina, locomotor ataxia, transverse sp
. Medical diagnosis for the student and practitioner. taxia or spastic ataxia according to the type of motor defectpresent. Even the dynamic ataxia may be found extremely complex if oneanalyzes the several factors which enter into or intensify it, , lost cen- Static ataxia. Motor ataxia. Cerebellarataxia. I208 MEDICAL DIAGNOSIS tripetal of deep sensory impulses from the muscles, bones and joints, cutan-eous anesthesia and impaired muscle-tonus being most important. Ordinary ataxia indicates cortical lesions or those of the pons crura andcorpora quadrigemina, locomotor ataxia, transverse spinal lesions, ataxicparaplegia, Friedreichs disease or syringomyelia. Stereognosis.—The inability to recognize familiar objects by touch(parietal lobe) usually suggests a lesion of the parietal lobe. Significance of Sensory Disturbance.—Hemianesthesia of hysterical origincommonly affects the left side, is sharply defined and frequently completeeven as to the special senses. SupraclavicularCircumflex Intercosto-humeral Wrisberg Internal cutaneous. Musculo-spiral Musculocutaneous Ulnar Radial portionMusculo-spiral Median Fig. 603. -Distribution of the sensory nerves of the skin of the arm, posterior aspect.{G. R. Butler.) Cortical hemianesthesia is combined with hemiplegia and usually incom-plete unless associated with an unusually large lesion or involving the opticthalamus. Crossed hemianesthesia associated with hemiplegia of the opposite side hasbeen referred to as present in unilateral lesions of the cord (Brown-Sequardparalysis). Hemianesthesia and hemiplegia with crossed oculo-motor paralysis indicatesa lesion of the crus, and finally, combined hemianesthesia and hemiplegia mayoccur as the result of a lesion of the internal capsule. Anesthesias of patchy distribution suggest hysteria or neuritis and as between CORTEX LESIONS 1209 those mono anesthesias due to a spinal lesion and the rare cerebral form theformer presents a sharp boundary line, the latter an anesthesia di
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