A brief summary of current research.
Haxel, BR, Grant, L, Mackay-Sim, A. Journal of Head Trauma Rehabilitation, Vol. 23, No. 6, pp. 407-413.
Nearly thirteen percent of participants in this study had a decreased sense of smell after head trauma. The presence of skull-base fractures and intracranial bleeding or bruising was positively connected with a difficulty perceiving smells as well.