<prompt> Area 4 of the coex corresponds to:Primary motor areaPrimary sensory areaVisual coexNone of the above  <response>: The primary motor coex MI corresponds to the precentral gyrus area 4. It is the area of coex with the lowest threshold for eliciting contralateral muscle contraction by electrical stimulation. Ref: Grays anatomy 40th edition, Chapter 21. 