MRI in autosomal recessive hereditary spastic paraplegia: high T2 signal intensity in periventricular white matter and corona radiata with thin corpus callosum. MRI in autosomal recessive hereditary spastic paraplegia: high T2 signal intensity in periventricular white matter and corona radiata with thin corpus callosum. Reprinted with permission from Hourani R, et al. Am J Neuroradiol 2009;30(5):936–40. DOI: https://doi.org/10.3174/ajnr.A1483. Lina Nashef et al. Pract Neurol 2019;19:115-130 ©2019 by BMJ Publishing Group Ltd