The Montreal Dementia Scale provides caregivers an overview of the stages of cognitive function for those suffering from dementia. It is broken into 7 stages with stage 1-3 being defined as pre-dementia stages. Beginning in stage 5, an individual can no longer survive without assistance or is at risk of flight. Stage 7 is very severe cognitive decline whereby vocabulary is limited, there is a loss of ability to walk, and requires help with eating.