Yes, you are right about THE ATOMIC BRAIN for the second sample. I am much impressed. How'd you manage to sit through the movie in the first place?
The Mst3k version makes it easier to watch ATOMIC BRAIN. While that exact cue might not be in it, the film music still has those noticeable flute bits - tweet...tweet...tweet.
Speaking of Mst3k, I recall them making fun of the music in (I think) "Radar Secret Service" - the music sounded like the "Oh those Golden Grahams" cookie commercial. The first sample (curiously labeled "BH" - Bernard Herrmann?) has a similar riff, so could it be either of the IMDB credited composers, Russell Garcia and Dick Hazard? I know Steve H already suggested Garcia.