A treatise on the principles and practice of medicine . acial muscles contract andthe eye deviates, then the next area above participates, and finally thehigher leg centre is implicated. That is, the spasm never skips over acentre. 752 DISEASES OF THE BRAIN The spasms are often preceded by a tingling in the part and are mostlyclonic, or clonic broken by tonic spasms. Consciousness is maintained,unless the fits reach the other side, are very frequent or the lesion isdeep, below the cortex. The opposite side is involved through thecommisural fibers of the corpus callosum. Jacksonian differs from
A treatise on the principles and practice of medicine . acial muscles contract andthe eye deviates, then the next area above participates, and finally thehigher leg centre is implicated. That is, the spasm never skips over acentre. 752 DISEASES OF THE BRAIN The spasms are often preceded by a tingling in the part and are mostlyclonic, or clonic broken by tonic spasms. Consciousness is maintained,unless the fits reach the other side, are very frequent or the lesion isdeep, below the cortex. The opposite side is involved through thecommisural fibers of the corpus callosum. Jacksonian differs fromregular epilepsy in that no cry is observed, the commencement is localand more gradual and consciousness, if lost, disappears gradually, notprecipitately. The seizure lasts several seconds to a minute or two andis followed by some vertigo, nausea, stupor or disturbance of speech; ifspasms occur without paralysis, paresis in the involved parts follows, HEAD TO OPPOSITE SIDE HEAD AND EYES TOOPPOSITE SIDES TO MID ASSOCIATED MOVEMENTS OF EYES. FINGERS_ALONE THUMB_ALONE FISSURE OF ROLANDOPf FISSURE OF SYLVIUS Fig. 51.—Cerebral localization in detail: F\, Fz, Fs, first, second and third frontal con-volutions; , ascending frontal convolution and , ascending parietal convolution;, supramarginal and , angular convolution; 0\, O2, O3, first, second and third occipitalconvolutions; Ti, T2, Tz, first, second and third temporal convolutions. The explanationof line A, A is given under Internal Capsule. due to transient exhaustion of the cortex. Jacksonian epilepsy in itslightest forms may be sensory. Regarding sensory localization in the cortex, Munk held that thesensory and motor areas are the same (v. i.). Vasomotor disturbanceis common in cortical lesions. After total lesions of the central convolutions, the hands improvevery little in adults; other members improve, to some extent, throughassumption of function by the sound side of the brain; in young indivi
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