haha do you remember which MC they were?
I found the visual perception MC really dodgy, especially the perception/sensation bits..
and haha just checked, not here yet 
umm of course. I could never forget the stupid mistakes I made!! haha. It's like imprinted in my memory unfortunately.
Q2: Corpus Callosum, for some the thing Roger Edwards said at his lecture about NEVER saying "tranferring" as that's incorrect made me change it from option A which I had originally to option D. I really should have thought that through more cos I knew that the corpus callosum wasn't located in the cerebral cortex. Lapse of judgment on my behalf.
Q12: I originally put sympathetic and parasympathetic "have opposite effects although they work together" cos I thought the other statement that "they cannot both be active at the same time" was too definitive and they're usually wrong in psychology. However, due to my nervousness I second guessed myself and changed it at the end.
Q20: "One key difference between visual sensation and visual perception is that"
I originally put "visual perception involves a cognitive process while visual sensation does not" but then changed it to "visual perception can be consciously controlled while visual sensation cannot" at the end. This one I don't know the reason behind. I just remember swapping it at the end as well in my fit of panic.
I thought the brain and nervous system sections of the mid year were both fairly tricky and required analytical skills instead of just rote learning. Plus I agree about the sensation/perception. They barely ever asked about that in past years and yet there were 3 MC questions on it. That kinda caught me by surprise..
So yeah, moral of the story. Don't swap answers at the end!