Brain wave and Close up

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

Close up and brain wave are semantically related. In some cases you can use "Close up" instead a noun phrase "Brain wave".

Close up adverb - Very close.

Brain wave and close up are semantically related. Sometimes you can use "Brain wave" instead a noun "Close up".