Its title notwithstanding, nothing in “Arctic Hysteria: New Art From Finland” betrays pathological overexcitement. On the surface, at least, all the works in this 16-artist show at P.S. 1 Contemporary Art Center are coolly controlled. Nevertheless, something hot runs through them: urgent emotions and irrational fantasies. Whether or not this cool-hot dichotomy reflects a split between the flinty and the mystical in the Finnish sensibility, it makes for a transporting show. The most striking instances of emotional tension are in film and video works.