Decline in doing house chores can be caused by lack of motivation (please see apathy [1]) or by planning difficulties [2]. Planning difficulties usually happen because the patient cannot cope with the several steps that are involved in a complex task.
Try this:
Links:
[1] http://memory.ucsf.edu/ftd/overview/symptoms/multiple
[2] http://memory.ucsf.edu/ftd/overview/biology/executive/multiple