The first signs and symptoms of Alzheimer's disease are referred to collectively as mild cognitive impairment. This affects approximately 20 percent of the population over the age of 70, the Mayo Clinic reports. According to the National Institute on Aging, onset can begin with increasing memory problems---more so than typical of other people of the same age---and mild cognitive problems that can interfere with daily living and safety.
Disorientation
Disorientation and misplacement of items of importance (such as documents and car keys) can be indicative of early Alzheimer's disease, according to the National Institute of Neurological Disorders and Stroke. The individual may become lost, forgetful or frustrated, and may take considerably more time to complete everyday tasks than normal. He may also repeat information, ask questions repeatedly, and stop retaining information integral to keeping appointments or paying bills. The fear associated with becoming disoriented can manifest itself in outbursts of anger, which can pose a significant threat to the person and others around him.
Poor Decision-Making and Problem-Solving
The Alzheimer's Association states that those with early Alzheimer's may begin to exhibit poor decision-making and problem-solving skills. She may forget names of standard household items, wear inappropriate clothing for the weather or give away large sums of money to strangers. Not only does this place the individual with mild Alzheimer's at a disadvantage, but could ultimately endanger her and make her vulnerable to cons.
Mood Instability and Personality Change
Mood instability and changes in personality are characteristic of early Alzheimer's. While personality changes are often the result of exaggerated idiosyncrasies which existed prior to onset of the disease, mood instability can closely resemble bipolar disorder. Alzheimer's Treatment reports that the extreme mood swings which occur with Alzheimer's can be triggered without warning or provocation and can vary between complete agitation to more solemn bouts of crying for no apparent reason.
