Okay, thanks for the clarification; I know it's used in musical performance, so I could've followed that case back to its correct line of explanation if I'd thought about it. And that's really interesting about the precision sports - I wouldn't have thought of the advantage of a beta blocker in sports like that but it makes perfect sense.

For some reason, I could never keep the adrenergic receptors straight. I think part of the difficulty for me, personally, is that I've taken a beta blocker and felt like it was easier to "breathe" which is obviously nonsensical from a bronchiole standpoint, so I probably keep transposing the effect in my head to make sense of that.

Thanks for the chance to revisit some of this!