People born / acquire with a deaf left ear have an enlarged Brodmann’s 41 / Primary Auditory Cortex / right superior temporal gyrus (rSTS) / Heschl’s gyrus )
Also enlarged in musicians.
Source / active during “inner voice” – people thinking a lot of words to themselves have bigger ones
Also enlarged in Autism
Also linked to ADHD differentiation
https://www.jneurosci.org/content/34/33/10937.short