Gellrich J, et al. - Researchers spired to gauge the gray matter (GM) structural changes within olfactory-related regions of the brain in patients with smell loss due to upper respiratory tract infection (URTI), before and after olfactory rehabilitation. The findings brought to light a connection between olfactory training [OT] with an increase in GM volume of the hippocampus and the thalamus. This possibly indicated a strategy for more effective exploitation of olfactory signals based on a higher degree of attention toward odors and association of memories with olfactory input.