frontotemporal
noun(fron-to-tem-po-ral)
any of several degenerative brain diseases that are caused by progressive atrophic changes in the frontal or temporal lobes, that usually start in late middle age, that result in changes to behavior and personality (such as impulsiveness, social impropriety, and apathy) and typically impaired language function, and that lead in advanced cases to a profound decline in cognitive and language functioning —abbreviation FTD