A patient diagnosed with Alzheimer disease (AD) is demonstrating signs of impaired reasoning. The healthcare provider suspects an alteration in which area of the brain?

The frontal lobe controls responses from the rest of the central nervous system. It is responsible for emotion, behavior, intellect, and memory. Frontal lobe function will be involved if the patient is demonstrating signs of impaired reasoning. The occipital lobe regulates the comprehension of visual images and written words. The hippocampus is the center for learning and processing information into long-term memory. There are two amygdalae in the brain, part of the limbic system that controls emotions and the ability to perceive emotions in others.