. A practical treatise on medical diagnosis for students and physicians . of the spinal cord, cross the median line, and then enter the columns ofBurdach and then become more central in the columns of Goll. The same course is fol-lowed by fibres entering at higher levels. These fibres terminate in the nucleus gracilisand nucleus cuneatus of the medulla. From these, other sensory neurons arise which passupward through the tegmentum and internal capsule, and terminate chiefly in the opticthalamus. EXAMINATION* OF THE NERVOUS SYSTEM. produce Bevere pain, usually referred to the part supplied l>
. A practical treatise on medical diagnosis for students and physicians . of the spinal cord, cross the median line, and then enter the columns ofBurdach and then become more central in the columns of Goll. The same course is fol-lowed by fibres entering at higher levels. These fibres terminate in the nucleus gracilisand nucleus cuneatus of the medulla. From these, other sensory neurons arise which passupward through the tegmentum and internal capsule, and terminate chiefly in the opticthalamus. EXAMINATION* OF THE NERVOUS SYSTEM. produce Bevere pain, usually referred to the part supplied l>\ the nerve*and there are also sensitive |>• • i111~ or general tenderness over the nerve-trunk. Certain forms of irritative lesion produce partial alteration ofsensation, which is usually spoken of as paraesthesia (9. «.). Trophicchanges in the skin often occur. Destructive lesions of toe posterior rootsalso produce total anaesthesia. It the lesion is on the peripheral side oftin- ganglion, there are in addition trophic changes in the part supplied. Pig. Showing the relative positions of the several motor tracts in their course from the cortexto the section through the convolutions is vertical: that through the internal capsules, IC, hori-zontal; that through the cms is again vertical. CX, caudate nucleus: OTH, optic thalamus; 1?and L3. the middle and outer parts of the lenticular nucleus : fa I, face, arm, and leg fibres. Thewords in italics indicate the corresponding cortical centres. (Gowees.) If the lesion lies between the ganglion and the spinal cord, the anaesthesiais total, but trophic changes do not occur. Lesion of the ganglion itselfusually produces anaesthesia and trophic changes, if complete ; if partial,the are variable. In some cases herpes zoster along the courseof the nerve has been observed. Irritative lesions of the posterior rootsproduce fulgurant pains in the limbs, or a feeling of constriction in thetrunk. They may also be t
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