"Hill country blues (also known as North Mississippi hill country blues or North Mississippi blues) is a regional style of country blues. It is characterized by a strong emphasis on rhythm and percussion, steady guitar riffs, few chord changes, unconventional song structures, and heavy emphasis on the \"groove\" - more affectionately known as \"the hypnotic boogie.\"Hill country refers to the northern region of Mississippi bordering Tennessee."@en . . "Hill country blues"@en . . .