What distinguishes dementia from delirium?

Dementia is characterized as a progressive decline in cognitive function that typically worsens over time, whereas delirium is often a sudden onset of confusion and cognitive disturbances that can result from underlying medical conditions, medications, or environmental factors, making it usually reversible when the cause is treated. This distinction is crucial in gerontology, as recognizing delirium is key to effective management and resolution, while dementia requires a different approach focused on long-term care and support due to its progressive nature.

The other options do not accurately convey the differences between the two conditions. Dementia is not classified as acute; rather, it develops gradually over time. Additionally, while both conditions impact cognitive function, they do so in markedly different manners, with delirium being transient and often fluctuating, unlike the steady progression seen with dementia. Therefore, understanding these distinctions is essential for appropriate diagnosis and treatment strategies.