Light propagation in the brain depends on nerve fiber orientation. Export

@article{citeulike:819305, abstract = {In this study, the penetration of red laser light (632.8 nm) in fresh bovine brain was measured parallel, oblique, and perpendicular to the axis of white matter tracts. The measurements were performed in eight samples with an isotropic light source and detector and were obtained by advancing the detector tip toward the light source in the tissue. A statistically significant difference in the effective attenuation coefficient of the light (mueff) was found between the parallel and perpendicular directions, 0.47 +/- 0.06 mm -1 and 0.63 +/- 0.13 mm-1, respectively (P = 0.005). The measurements taken at an angle of 45 degrees in the same sample resulted in an intermediate mueff of 0.58 +/- 0.09 mm-1. These results suggest a preferential guidance of light along the axis of the white matter tracts of the brain.}, address = {Laser Center, Academic Medical Center, Amsterdam, The Netherlands.}, author = {Hebeda, K. M. and Menovsky, T. and Beek, J. F. and Wolbers, J. G. and van Gemert, M. J.}, citeulike-article-id = {819305}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/7808616}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=7808616}, comment = {proof of anisotropy of light propagation in white matter}, issn = {0148-396X}, journal = {Neurosurgery}, keywords = {nirs, scattering}, month = {October}, number = {4}, posted-at = {2006-08-27 17:35:39}, priority = {4}, title = {Light propagation in the brain depends on nerve fiber orientation.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/7808616}, volume = {35}, year = {1994} }

TY - JOUR ID - citeulike:819305 L3 - citeulike-article-id:819305 N2 - In this study, the penetration of red laser light (632.8 nm) in fresh bovine brain was measured parallel, oblique, and perpendicular to the axis of white matter tracts. The measurements were performed in eight samples with an isotropic light source and detector and were obtained by advancing the detector tip toward the light source in the tissue. A statistically significant difference in the effective attenuation coefficient of the light (mueff) was found between the parallel and perpendicular directions, 0.47 +/- 0.06 mm -1 and 0.63 +/- 0.13 mm-1, respectively (P = 0.005). The measurements taken at an angle of 45 degrees in the same sample resulted in an intermediate mueff of 0.58 +/- 0.09 mm-1. These results suggest a preferential guidance of light along the axis of the white matter tracts of the brain. IS - 4 JF - Neurosurgery SN - 0148-396X AD - Laser Center, Academic Medical Center, Amsterdam, The Netherlands. TI - Light propagation in the brain depends on nerve fiber orientation. VL - 35 KW - nirs KW - scattering N1 - proof of anisotropy of light propagation in white matter AU - Hebeda, KM AU - Menovsky, T AU - Beek, JF AU - Wolbers, JG AU - van Gemert, MJ PY - 1994/10// UR - http://view.ncbi.nlm.nih.gov/pubmed/7808616 ER -