composed primarily of
white matter
http://upload.wikimedia.org/wikipedia/commons/d/d7/Grey_matter_and_white_matter_-_very_high_mag.jpg
https://upload.wikimedia.org/wikipedia/commons/d/d2/Spinal_nerve.svg
nlx_anat_101177 seems to have been lost in the transition from NIFGA to Neurolex
uberon
FMA:83929
neuronames:2870
substantia alba
white mater
MA:0001135
TAO:0000145
EMAPA:35927
NLXANAT:101177
Neural tissue consisting of myelinated axons connecting grey matter areas of the central nervous system.
white substance
TAO:0002143
AEO:0001011
TAO:0002142
white matter of neuraxis
UBERON:0002316
neuronal white matter
CNS tract/commissure
CNS tracts and commissures
CNS white matter
UMLS:C0682708
PBA:294022044
VHOG:0001764
NCIT:C33892
Multi-tissue structure comprised largely of myelinated axons.[TAO]
Wikipedia:White_matter
HBA:9218
NLX:412
ZFA:0001682
AEO:0000139
Cell part cluster consisting predominantly of neurites in the brain and the spinal cord[FMA:83929].
MESH:D066127
The myelination of axons by glial cells was the last major step in the evolution of cells in the vertebrate nervous system, and white-matter tracts are key to the architecture of the mammalian brain.[well established][VHOG]
myelinated nerve fiber
central nervous system cell part cluster