What changes occur to the Cerebrum during a lack of oxygen injury?

I need your help. I am seeking information about how the brain works with motor-skills in both normal people and those with Cerebral Palsy. I'm 31 yrs old and have had (Mild) Cerebral Palsy since birth (Partial Spastic Quadriplegia). It was due to a lack of oxygen because of poor lung development at the time of my birth (birth asphyxia). I am trying to figure out the motor-skills part of the brain (i.e. - the Cerebrum) to understand why I am so different from everyone else. I am interested in knowing what actually happens with-in the brain at the time of injury that causes Cerebral Palsy when there is a low to no oxygen level in the brain for any length of time. How does the cerebrum change? What changes occur in the cerebrum that causes CP? How is the cerebrum supposed to normally work? How does the cerebrum actually work after the injury?

The reason I am asking all of these questions are because I would like to know why and how my spasms are occuring and why I cannot use and/or turn off my muscles in a 100% capacity like everyone else can. How can I have full control of my muscles one minute with none or little control the next. Why does it affect one section of my body one moment and then change over to the next section of my body the next instead of effecting the entire body at the same moment. Why during the course of a single day do my muscles sometimes feel normal at my full control and then other times lightly stiffen and at other times lock into place and then at other times contract and release dozens of times per second.

From my understanding it is supposed to be similar to a light switch turning on and off by force of will but what I want to know is how that switch is actually working for me and how would it normally work if I hadn't been born with CP. I've tried to figure it out on my own through research on the internet but cannot come up with any answers. Please I need answers, I need your help. If you can explain it that would be wonderful, if not then please give me some ideas or names of reference materials that I can use to look it up on my own.

[mommyofnathan]

You don't perhaps suffer from dystonia?

[eagle51]

I'm not quite sure, I've suspected so for several months now, but I have no real proof. Over the years my spasms have been increasing in intensity and pain. They happen more often and last longer then I remember them as a child. Which from what I've read does sound like dystonia. My folks refuse to discuss my condition any further than they already have and are also slacking off on giving me any medical papers they have on me. I saw a lot of different doctors growing up but none that I can remember specializing in CP.