In fact this is not quite a mental illness thing. Neurotypicals also experience this. However, the difference is that in those with ADHD, or autism, it occurs much more frequently, and the cause has to do with the brain, not just slipping on words from time to time.
This can be caused by different things, as studies have looked into this.
Here is the definition of aphasia, from Mayo Clinic:
âAphasia gets in the way of a personâs ability to use or understand words. Aphasia does not impair the personâs intelligence. People who have aphasia may have difficulty speaking and finding the ârightâ words to complete their thoughts. They may also have problems understanding conversation, reading and comprehending written words, writing words, and using numbers.â
Whereas in neurotypicals, an occasional flump in word usage can be associated with the brainâs compartmentalization, in aphasia it is caused by the language parts of the brain being affected by an injury or illness, making understanding, speaking, or both more difficult.
Anomic Aphasia is when the brain cannot remember the name of an object. As the wiki page states, âAnomic aphasia (also known as dysnomia, nominal aphasia, and amnesic aphasia) is a mild, fluent type of aphasia where individuals have word retrieval failures and cannot express the words they want to say (particularly nouns and verbs).â Basically this means they know what the object is, they can identify and describe what it looks like and does, and even draw it or point it out, but cannot put the proper name to it.
Aphasia is typically associated with stroke victims, head injuries or brain tumors, but disorders that affect language, such as autism, can also cause symptoms of aphasia.
I would absolutely not be surprised if ADHD can also result in anomic aphasia, since Brocaâs Area (a location on the left side of the frontal lobe associated with expression through speech) is in the frontal lobe, the part of the brain most affected by ADHD.