Organic and functional nervous diseases; a text-book of neurology . Locomotor ataxia. Lesion at the lower lumbar region. The median portion of the column of Gollis normal. The root zone is chiefly aiFected. (Larkin.) more extensive (Fig. 155), but in all cases a region adjacent to the pos-terior commissure will be found to contain normal fibres, and another Fig. Locomotor ataxia. Lesion at the mid-dorsal region. The posterior marginal zone near the post-commissure is normal. Both columns of Goll and Burdach and Lissauers columns are affected. Samecase as Fig. 144. (Larkin.) region adjace
Organic and functional nervous diseases; a text-book of neurology . Locomotor ataxia. Lesion at the lower lumbar region. The median portion of the column of Gollis normal. The root zone is chiefly aiFected. (Larkin.) more extensive (Fig. 155), but in all cases a region adjacent to the pos-terior commissure will be found to contain normal fibres, and another Fig. Locomotor ataxia. Lesion at the mid-dorsal region. The posterior marginal zone near the post-commissure is normal. Both columns of Goll and Burdach and Lissauers columns are affected. Samecase as Fig. 144. (Larkin.) region adjacent to the posterior fissure and along the periphery of thecord may escape (Fig. 154). These are the posterior cornu-commis-sural tract and the sulco-marginal tract, which consist of endogenousfibres. A careful examination of the sclerotic region will also demon-strate the existence witiiin it of numerous normal fibres which are also 348 LOCOMOTOR ATAXIA. undoubtedly of endogenous orgin, belonging to the third set of fibresdeveloped in embryonal life. (See Fig. 147.) In very advanced cases of tabes the lesion through the cord is ex-
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