In psychology, logorrhea or logorrhoea (from Ancient Greek λόγος logos "word" and ῥέω rheo "to flow") is a communication disorder that causes excessive wordiness and repetitiveness, which can cause incoherency.
This ailment is often reported as a symptom of Wernicke's aphasia, where damage to the language processing center of the brain creates difficulty in self-centered speech.
From the "stream of unchecked nonsense often under pressure and the lack of self-correction" that the patient may exhibit, and their circumlocution (the ability to talk around missing words) we may conclude that they are unaware of the grammatical errors they are making.
Logorrhea has been shown to be associated with traumatic brain injuries in the frontal lobe[7] as well as with lesions in the thalamus[8][9] and the ascending reticular inhibitory system[10] and has been associated with aphasia.
[11] Logorrhea can also result from a variety of psychiatric and neurological disorders[10] including tachypsychia,[12] mania,[13] hyperactivity,[14] catatonia,[15] ADHD and schizophrenia.
[citation needed] Logorrhea is a common symptom of Wernicke's aphasia, along with circumlocution, paraphasias, and neologisms.