The nurse is caring for a patient with major depressive disorder. The nurse recognizes which sign/symptom supports the diagnosis of depression?

Which degenerative neurologic disorder is caused by neurofibrillary tangles and amyloid plaques?

The older adult patient is brought to the emergency department with sudden onset confusion, agitation, and hallucinations. The patient's past medical history is significant for type 2 diabetes managed with glyburide, anxiety managed with lorazepam, and insomnia managed with zolpidem. Upon assessment, the patient's heart rate and rhythm are regular, lungs are clear to auscultation, and bowel sounds are present. Vital signs are normal, with exception of a slightly elevated heart rate. Which is the most likely cause of the patient's symptoms?