Basal ganglia or Basal nuclei?

I know some of you are going to scroll down and think I'm not reading all that! For those of you, I have a small summary paragraph at the end. If you're more a "bring it on kinda person", then read the whole thing. I realise the basal ganglia can be a confusing topic, hence this post, if you come across terms your not familiar with, you can look them up in my neuroanatomy primer post.