The most troublesome words, researchers have found, are proper nouns and the names of objects. This retrieval inability can last anywhere from a split second to minutes or even hours, and they...

In healthy adults, occasional failures to name a picture of a common object are linked with changes in activity in brain regions that control motor aspects of speech, suggesting a spontaneous problem with articulation rather than a loss of word knowledge.

Forgetting words or choosing the wrong words is one of the main symptoms of brain fog.

It's normal to forget things from time to time, and it's normal to become somewhat more forgetful as you age. But how much forgetfulness is too much? How can you tell whether your memory lapses are normal forgetfulness and within the scope of normal aging or are a symptom of something more serious?

Common brain blips include misplacing frequently used objects, such as keys or glasses, forgetting why we walked into a room, and periodic difficulty remembering a word we want to say. Brain...