When it comes to how the human brain functions healthily, there are a lot of unknowns. As a result, it is often difficult to understand disorders that affect the brain \u2014 and recognize when one of these disorders impacts you or a loved one.\nThe terms \u201cmemory loss,\u201d \u201cdementia,\u201d and \u201cAlzheimer\u2019s\u201d are often used interchangeably when people describe an elderly person with decreased cognitive ability. But in fact, all three mean something different.\nMemory loss is a common part of the aging process and isn\u2019t always a sign of something serious. It is also a symptom of both dementia and Alzheimer\u2019s \u2013 which aren\u2019t the same condition, though many people confuse them.\nDementia and Alzheimer\u2019s disease are not a normal part of aging and should be addressed by a physician.\nAlzheimer\u2019s vs. Dementia: What\u2019s the Difference?\nDementia isn\u2019t a disease \u2013 it\u2019s a broad term that describes a decline in a person\u2019s mental ability to the point that their daily life is negatively affected. Dementia refers to a variety of symptoms related to memory, thinking, and social capabilities.\nAlzheimer\u2019s, on the other hand, is a disease that ranks as the most common cause of dementia among older people. While the symptoms of Alzheimer\u2019s and dementia overlap, a person can experience dementia that is not at all related to Alzheimer\u2019s disease.\nWhat Is Dementia?\nDementia is caused by damage to brain cells that interrupts their normal functioning. Dementia is usually progressive, meaning that symptoms are initially mild and worsen over time. Different types of dementia affect different areas of the brain, and therefore, have different symptoms.\nAs a person\u2019s brain cells are damaged, their mental functions decrease. For a condition to be diagnosed as dementia, at least two of the following functions must be severely impaired:\n\nMemory\nCommunication\/language\nAbility to focus and pay attention\nReasoning\/judgment\nVisual perception\n\nDoctors diagnose dementia by examining a person\u2019s medical history and asking them and their loved ones about any behavioral\/mental abnormalities, testing a person\u2019s mental skills like attention and language, carrying out standard medical tests to rule out other causes, and performing CT, MRI, or PET scans to look for a cause.\nDementia can be caused by Alzheimer\u2019s or another disease, or it can be the result of environmental or lifestyle factors.\nRELATED:\u00a0Address Signs of Dementia Early for Best Care\nWhat Is Alzheimer\u2019s Disease?\nAlzheimer\u2019s is a type of dementia affecting memory, thinking, language, and behavior.\nMost affected people are diagnosed after the age of 60, though some may be diagnosed in their 40s or 50s (early-onset Alzheimer\u2019s). Alzheimer\u2019s is the result of the deterioration of brain tissue that interferes with brain cells\u2019 ability to function normally. Over time, connections between brain cells are broken and tissue shrinks to the point that affected individuals usually end up depending entirely on others for daily life.\nRELATED:\u00a0Recognizing the Signs of Alzheimer\u2019s\nStages of Alzheimer\u2019s Disease\nThe disease varies for each person affected, but the general stages of its progression are as follows:\n\nNormal behavior \u2013 Brain changes can begin as much as 10 years before diagnosis, though the person will show no symptoms.\nMild mental decline \u2013 The person, and then their loved ones, may notice subtle signs like forgetting words and names, repeating questions, or struggling with planning.\nModerate mental decline \u2013 Memory issues may worsen, and affected people may forget things about themselves, forget the date or time, lose track of where they are, or get confused while dressing or doing other daily tasks.\nSevere mental decline\u00a0\u2013 Those affected may mix people up and be unable to associate names with faces. They may also suffer from delusions, like needing to go to a store that\u2019s been out of business for years.\nVery severe mental and physical decline \u2013 In the end stages of the disease, the person will likely need help to eat, walk, and take care of themselves.\n\nRELATED:\u00a0Recognize Common Health Concerns in Seniors Early\n\nIs There a Cure for Dementia and Alzheimer\u2019s?\nThere is no cure for either Alzheimer\u2019s disease or dementia.\nDepending on the cause of dementia, doctors can prescribe medication to manage or slow down its symptoms. Though individuals can live with dementia for decades, it usually shortens people\u2019s lifespans.\nAlzheimer\u2019s is a terminal disease, though researchers are actively looking for a cure. Medications can be prescribed to manage behavioral changes, memory loss, depression, and other symptoms. But there is no way to stop the effects of the disease.\nIf you think you or a loved one may be affected by dementia or Alzheimer\u2019s, make an appointment with your primary care physician. Visit UPMC\u2019s Aging Institute website for more information on caring for elderly loved ones and recognizing brain disorders. You can also find more information by visiting the website for UPMC Neurology Services.