Originally Posted by the sci guy

I have "flat" bullhorns on mine, which means from the center they go out straight to the sides, curve forward, and then slightly up at the end.
"drop" versions drop downward from the center/stem various amounts of degrees, before the turn forward.

flat


drop



It's one or the other.
If you bar end brakes (like the ones pictured in the 2nd post, and the kind i mentioned, then there is no place for bar end shifters. you can jury rig something, but that's much more complicated. my bike is a single speed, so the need for shifters obviously wasn't there. if you have a geared bike, you can eithe do downtube shifters, or do bar ends and get regular brake levers that go on each side of the stem like flat bar brakes.