. A manual of diseases of the nervous system. ossible that some of the small fibres seen among larger ones may bedue to the division of the latter (Sherrington) ; but such division • So that in some descriptions the posterior horn is divided into (1) spnngy sub-stance of the horn itself, (2) gelatinous zone of the caput, and (3) spougy zoneat the ti]) of the horn. See Lissauer, Ai*ch. f. Psych., 1886. t See Obersteiner, loc. cit., p. 192. 208 SPINAL COED. has not been actually demonstrated, and is probably not variation in size is from 1 to 25 n (tswo to toVo inch). Thevariations
. A manual of diseases of the nervous system. ossible that some of the small fibres seen among larger ones may bedue to the division of the latter (Sherrington) ; but such division • So that in some descriptions the posterior horn is divided into (1) spnngy sub-stance of the horn itself, (2) gelatinous zone of the caput, and (3) spougy zoneat the ti]) of the horn. See Lissauer, Ai*ch. f. Psych., 1886. t See Obersteiner, loc. cit., p. 192. 208 SPINAL COED. has not been actually demonstrated, and is probably not variation in size is from 1 to 25 n (tswo to toVo inch). Thevariations are especially great in the fibres of the pyramidal tract,and it is in these that division has been thought to occur. Those ofthe direct cerebellar tract are uniformly large, while most of thosethat constitute the postero-median column are small. It will facilitate the detailed study of the tracts if we considerfirst those that undergo secondary degeneration for a considerabledistance, as our knowledge regarding these is the most
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