Diseases of the nervous system : a text-book of neurology and psychiatry . food refusal as in dementia precox, depressedmanic-depressives, fever deliria or confusion, expresses various sym-bolizations. Fear of being poisoned is here a frequent motive. Nuclear disease of the motor neuron of the trigeminus may beunilateral or bilateral, partial or complete. In unilateral monoplegiamasticatoria, the lateral movement of the jaw takes place to theparalyzed side. Bilateral lesion causes the jaw to fall, and abolishesall lateral movements. The floor of the mouth is flaccid from themylohyoid and digas
Diseases of the nervous system : a text-book of neurology and psychiatry . food refusal as in dementia precox, depressedmanic-depressives, fever deliria or confusion, expresses various sym-bolizations. Fear of being poisoned is here a frequent motive. Nuclear disease of the motor neuron of the trigeminus may beunilateral or bilateral, partial or complete. In unilateral monoplegiamasticatoria, the lateral movement of the jaw takes place to theparalyzed side. Bilateral lesion causes the jaw to fall, and abolishesall lateral movements. The floor of the mouth is flaccid from themylohyoid and digastric palsy, and there is difiiculty of hearing notesof low-pitched tuning forks. The muscles show atrophy, reaction ofdegeneration and the jaw-jerk is absent. DISEASES OF THE TRIGEMINUS 211 Peripheral trigeminus motor palsy is usually associated with sensory,sympathetic and taste phenomena. Nuclear disease of the motor neurons is comparatively rare. Itmay occur in multiple sclerosis, in syphilis of the pons, hemorrhage, i Anterior corporaQuadrigemina \ posterior corpora. Fig. 100.—Scheme of intracerebral trigeminus pathways. Cs, left hemisphere; Cd,right hemisphere; Th-cort., thalamocortical trigeminus tracts; Th, synapses of trigem-inus in thalamus; Sch, mesencephalic leinniscus; tnot. Trig., motor trigeminus rootnuclei in midbrain; mot. Tr. K., motor trigeminus nucleus in locus ceruleus; Rad. mot.,motor roots; Ggl. Gass., Gasserian ganglion; I, II, III, three trigeminus branches;, mesencephalic sensory trigeminus roots; sp. Tr. W., spinal trigeminus branches;<S. gel. Rol., substantia gelatinosa Rolando. Dotted line, motor, solid line, sensory.(Veraguth, Bing.) poliomyelitis, syringomyelia. Peripheral palsies are more frequent,and are due to trauma, to pressure of carotid aneurisms, tumors,chronic meningitis, rarely to an interstitial neuritis. Sensory Part.—Affections here are much more intricate and complex,and are often combined with motor symptoms. The sensory r
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