I tend to be terrible at explanations, so instead: a visual aid…

So the question is pretty simple. Is there a way to mirror adjusted vertex positions on a polygon mesh?
It’s been a good long time since I’ve delved into the computer animation scene - almost a half decade in fact - and it stands to reason there may have been some changes to maya I aint aware of and I’m hoping a shortcut around this issue is one of 'em.