“…Since the realisation of clinical, [1][2][3] pathological, 4,5 and genetic [6][7][8][9] overlaps between amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD), studies have increasingly focussed on cognitive deficits in patients with ALS and ALS-FTD. Behavioural changes, similar to those identified in the behavioural variant of FTD, 1,10,11 and executive deficits have been well described, 12 although non-executive cognitive impairment, including language dysfunction, also occurs.…”