Dementia, an umbrella term for various cognitive impairments, affects approximately 7 million people in the United States, with projections indicating a doubling of cases by 2060. While occasional forgetfulness can be a normal part of aging, experts note a distinction between age-related cognitive changes and dementia, which is defined by cognitive impairments that hinder daily function.
Dr. Stephanie Nothelle, a geriatrician at Johns Hopkins School of Medicine, explains that the transition to dementia occurs when cognitive issues begin to impair one's ability to perform daily tasks, such as driving, navigating familiar routes, or managing finances. Dementia encompasses conditions like Alzheimer's disease, vascular dementia, and Parkinson's disease, each with unique manifestations.
Beyond cognitive decline, several physical symptoms can be associated with dementia. Trouble walking and maintaining balance can emerge, requiring significant cognitive processing to manage sensory input and react to the environment. While these issues can also stem from other conditions like arthritis, a pattern of difficulty walking and frequent falls may indicate dementia. Similarly, changes in posture, shuffling feet, or a slower walking pace can be indicative, particularly in conditions like Lewy body dementia.
Unexplained changes in the sense of taste or smell, especially if unnoticed by the individual but remarked upon by loved ones, can also be a sign, particularly associated with Lewy body dementia. Difficulty swallowing, leading to food or liquids entering the airway, can increase the risk of aspiration pneumonia, a common issue in later stages of dementia. Incontinence, resulting from the degeneration of nerves that control bladder function, is another potential symptom. Constipation, which can precede other symptoms by years in Parkinson's-related conditions, is also noted.
Sleep disturbances, such as significant nighttime movement, shouting, or talking during sleep, may point to REM sleep behavior disorder, which can often precede Parkinson's disease or Lewy body dementia by years. Recognizing these symptoms is crucial, as early diagnosis can significantly aid in planning and managing the disease.
While treatments for dementia are not cures, they can help manage the disease. Furthermore, an early diagnosis allows individuals to have a say in future care, living arrangements, and financial decisions. Doctors can utilize biomarkers from blood or spinal fluid to identify the specific type of dementia and inform treatment strategies. Experts emphasize that adopting a healthy lifestyle, including a nutritious diet like the MIND diet, regular exercise, social engagement, and managing chronic conditions, can help reduce dementia risk or slow disease progression.