Is there a test for determining Genius???

When my dad had a stroke he had damage to the right hemisphere of his brain. The function of the left-hand side of his body was impaired. That puzzled me and made me wonder why the left hemisphere of the brain controls the right-hand side of the body and the right hemisphere the left-hand side. Is there any evolutionary benefit in this? 

How difficult is it to change people’s perception of you, I ask from a species point of view not a personal point of view although I do seem to have this trait.......

Once a perception of you is formed in a person’s brain is it possible for this to change.

example........ i meet someone form an opinion and its stuck, it makes no difference if i was wrong, the initial thought has been stored, is this a survival trait or is it just me....

On a personal level my work colleagues think I am a mean, grumpy old fart, but my friends know me as a generous, outgoing life of the party type. Do we sub consciously create perceptions based on the situation we found ourselves in.

Older and weaker animals sometimes leave the herd. What is it in their brain that triggers this behavior?

Is there a link with human depression?

Whenever I consume the smallest amount of a foodstuff containing lactose, i become disoriented, dizzy, have difficulty thinking clearly. This usually lasts for several days. A blood test has confirmed that i have problems with cows milk, but the associated stomach trouble is at least understandable. I thought that the blood/brain barrier would not permit anything harmful to cross?

I often drink some amount of tea while working (or not working) at the computer. I read and write for a long time (both work and leasure stuff), and then I start solving an online sudoku and I have to run to the toilet that very minute!

Can it be explained what psychological (not physiological, I suppose) mechanism stands behind this?

Has anyone else experienced a similar thing?

Generally speaking, the part of your brain controlling your language is in the left hemisphere, and the part controlling visual spatial functions is in the right. My dad recently told me of this phenomenon where in some people this is reversed. Before brain surgery, surgeons perform the Wada test to make sure they are fixing the correct part of the brain. Now I don’t particularly want brain surgery, so I was wondering if there was any way I could find out for myself if the sides of my brain are reversed. 

Although I read with fascination about brain neuroscience, I have never yet looked at the diagrams showing areas of the brain by function, with any sense of understanding, recognition or meaning.  The information does not ‘click’ and form understanding in the way I am used to.  I have no such trouble with, say, diagrams of structures and functions within a worm, or the periodic table.  My brain seems unwilling to construct a map of a brain.  Am I just slow to pick up a new idea, or is this a case of consciousness causing collapse?  Is anyone working on concepts (narratives, analogies, models) to help the scientifically literate, but non-specialist, to grasp and recall the ideas?