When Alzheimer's disrupts memory, language, thinking and reasoning, these effects are referred to as "cognitive symptoms" of the disease. The term "behavioral symptoms" covers a large group of additional symptoms that occur to at least some degree in many, but by no means all, individuals with Alzheimer's -- such as irritability, anxiety or depression; sleep disturbances; agitation (physical or verbal outbursts, general emotional distress, restlessness, pacing, shredding paper or tissues, yelling); delusions (firmly held belief in things that are not real); or hallucinations (seeing, hearing or feeling things that are not there).

Alzheimer's Behavior Management -- Tips for Managing Common Symptoms and Problems
As a caregiver for a loved one with dementia, it can be extremely worrying and upsetting to experience the behavior problems associated with mid-stage Alzheimer's disease. Patients may exhibit a wide
Alzheimer's Behavior Management -- Tips for Managing Common Symptoms and Pr...
Behavioral Symptoms -- Treatment Strategies
When Alzheimer's disrupts memory, language, thinking and reasoning, these effects are referred to as "cognitive symptoms" of the disease. The term "behavioral and psychiatric symptoms" describes a lar
http://www.alz.org/alzheimers_disease_behavioral_s...
Psychosis-related disturbances. Psychosis, agitation, and disinhibition in Alzheimer's disease: Definitions and treatment options
Approximately 50% to 80% of persons diagnosed with Alzheimer's disease (AD) have some type of behavioral or psychiatric condition (eg, agitation, psychosis, and/or disinhibition). Agitation is defined
Psychosis-related disturbances. Psychosis, agitation, and disinhibition in Alzhe...