Vertebral canal subdivision

http://linkedlifedata.com/resource/umls/relation/R11776614, http://linkedlifedata.com/resource/umls/relation/R99531644, http://linkedlifedata.com/resource/umls/relation/R122854432, http://linkedlifedata.com/resource/umls/relation/R17873130, http://linkedlifedata.com/resource/umls/relation/R04415394, http://linkedlifedata.com/resource/umls/relation/R17830307, http://linkedlifedata.com/resource/umls/relation/R04372573, http://linkedlifedata.com/resource/umls/relation/R122858103, http://linkedlifedata.com/resource/umls/relation/R02673771, http://linkedlifedata.com/resource/umls/relation/R122854433, http://linkedlifedata.com/resource/umls/relation/R17875095, http://linkedlifedata.com/resource/umls/relation/R04417357, http://linkedlifedata.com/resource/umls/relation/R17822337, http://linkedlifedata.com/resource/umls/relation/R04364603, http://linkedlifedata.com/resource/umls/relation/R122807881, http://linkedlifedata.com/resource/umls/relation/R98811477, http://linkedlifedata.com/resource/umls/relation/R12112916, http://linkedlifedata.com/resource/umls/relation/R99004450, http://linkedlifedata.com/resource/umls/relation/R12113019, http://linkedlifedata.com/resource/umls/relation/R12081866, http://linkedlifedata.com/resource/umls/relation/R99452900, http://linkedlifedata.com/resource/umls/relation/R122774743, http://linkedlifedata.com/resource/umls/relation/R17763688, http://linkedlifedata.com/resource/umls/relation/R04478029, http://linkedlifedata.com/resource/umls/relation/R98746546, http://linkedlifedata.com/resource/umls/relation/R98785440, http://linkedlifedata.com/resource/umls/relation/R12111037, http://linkedlifedata.com/resource/umls/relation/R99168703, http://linkedlifedata.com/resource/umls/relation/R12156445, http://linkedlifedata.com/resource/umls/relation/R99168734, http://linkedlifedata.com/resource/umls/relation/R12156456, http://linkedlifedata.com/resource/umls/relation/R99168715, http://linkedlifedata.com/resource/umls/relation/R12156451