Dementia, an umbrella term encompassing conditions like Alzheimer's disease and Lewy body dementia, can present with a range of physical symptoms that extend beyond memory lapses and cognitive impairment. Roughly 7 million people in America currently have dementia, a number projected to double by 2060. While occasional forgetfulness can be a normal part of aging, a critical distinction arises when cognitive impairments begin to affect daily functioning.
"The magic line that transitions someone from mild cognitive impairment to dementia is when one of their cognitive impairments is impairing function," explained Dr. Stephanie Nothelle, a geriatrician at Johns Hopkins School of Medicine. This can manifest as difficulties with tasks like driving, managing finances, or navigating familiar routes.
Physical Manifestations of Dementia
While cognitive changes are a hallmark of dementia, several physical signs can also be associated with the disease, often appearing later in its progression.
One notable physical symptom is trouble walking and maintaining balance. This requires significant cognitive processing, as the brain must integrate sensory information from the feet and visual cues from the environment while quickly reacting to maintain stability. Frequent falls, unsteadiness, and shuffling gaits can be indicators.
Changes in posture and a shuffling gait are also associated with certain types of dementia, particularly Lewy body dementia, which includes Parkinson's disease. These may include walking slower than usual.
Unexplained changes in the sense of taste and smell can also be linked to dementia, although they can be attributed to other factors like infections or sinus issues. Loved ones might notice an inability to detect strong odors, such as burning food.
Problems swallowing food and liquids, leading to the misdirection of food or fluid into the airway, can occur. This increases the risk of aspiration pneumonia, which is relatively common in later stages of dementia.
Bladder control issues, such as incontinence, can emerge as the nerves responsible for bladder control degenerate with the progression of dementia. Constipation can also be an early sign, particularly in conditions related to Parkinson's disease.
Sleep disturbances, including restless sleep, punching, shouting, or talking during sleep, are another area to monitor. This can be a sign of REM sleep behavior disorder, which can precede the onset of Parkinson's or Lewy body dementia by years.
The Importance of Early Detection
Experts emphasize that an early diagnosis of dementia is crucial. "Finding out early on can be really helpful for a lot of different reasons, including planning and just having a say in your future," said Nothelle. While current treatments do not offer a cure, they can aid in disease management and allow individuals to make important decisions about their care, living arrangements, and finances.
Medical professionals can utilize biomarkers in blood or spinal fluid to identify the specific type of dementia, informing treatment decisions. "As scary as we know that this is, a diagnosis and knowledge and early detection is power," noted Dr. Jori Fleisher, an associate professor at Rush University.
Adopting a healthy lifestyle, including a nutritious diet, regular exercise, social engagement, and managing chronic conditions like diabetes and sleep apnea, can also help reduce dementia risk or slow disease progression. Experts estimate that up to 42% of Americans over 55 may develop dementia, underscoring the value of both preventative measures and early preparedness.