Brain wave and Out in left field

Brain wave noun - (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph.

Out in left field and brain wave are semantically related. In some cases you can use "Out in left field" instead an adjective phrase "Brain wave".

Brain wave and out in left field are semantically related. Sometimes you can use "Brain wave" instead an adjective phrase "Out in left field".