Nervous and mental diseases . Fig. 144.—Sections of a syringomyelic cord. 1, Lower lumbar region ; 2, uj>j er lumbar region-3, midcervical region (Bruhl).. Figs. 145 and 146.—Sections of two syringomyelic cords showing common locations and extent of cavities (Brissaud). tion. It is soft, flattened, and sometimes fluctuating. The collapse ofthe canal may produce a furrow, so that the cord seems double. Thecondition finds its favorite locality in the cervical region, but may extendthroughout the entire length of the cord or be confined to any portionof it. Its upward extension carries it into
Nervous and mental diseases . Fig. 144.—Sections of a syringomyelic cord. 1, Lower lumbar region ; 2, uj>j er lumbar region-3, midcervical region (Bruhl).. Figs. 145 and 146.—Sections of two syringomyelic cords showing common locations and extent of cavities (Brissaud). tion. It is soft, flattened, and sometimes fluctuating. The collapse ofthe canal may produce a furrow, so that the cord seems double. Thecondition finds its favorite locality in the cervical region, but may extendthroughout the entire length of the cord or be confined to any portionof it. Its upward extension carries it into the fourth ventricle. The cross-section usually reveals a single oval cavity, or there mavbe several in communication or independent. The customary situation 1 Am. Jour. Med. Sci., Mar., 1899. 2 Nebelthau, Zeit. f. Xervenh., Feb., 1900. 388 DISEASES OF THE CORD PROPER. is in the immediate neighborhood of the central canal and behind it,but it may extend laterally into the anterior or more commonly into theposterior horn of gray matter, either on both sides or , it may be limited to one posterior horn. While the white columnsof the
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