Final answer:
Final stage dementia symptoms include severe cognitive decline, complete dependency on caregivers, and loss of basic physical functions.
Step-by-step explanation:
The final stage of dementia is characterized by severe cognitive, physical, and functional decline. Specifically, common symptoms include loss of ability to communicate, full dependency on others for care, and loss of physical functions such as bladder and bowel control. Patients in the final stage of dementia may not recognize family members, and they typically require full-time care, often in specialized facilities. The progression of dementia, particularly Alzheimer's disease, leads to increasing damage to the brain and a corresponding decrease in the patient's ability to function independently.