RESULTS	Combining Xenon with 24 hours HT offered 75 % global histological neuroprotection with similarly improved regional neuroprotection : thalamus ( 100 % ) , brainstem ( 100 % ) , white matter ( 86 % ) , basal ganglia ( 76 % ) , cortical gray matter ( 74 % ) , cerebellum ( 73 % ) , and hippocampus ( 72 % ) .\