Pay attention if most of the time you have kernel panics something happens that generate vibrations and they can affect your mac. There is a motion sensor within the macs to prevent further damage to the hard disk, in case of fall ... but sometimes becomes overly sensitive and to notice any small vibration acts and can generate kernel panics. I think this was my case, the truth was already desperate ...
Here I leave the page with all the information of what to do :)
http://osxdaily.com/2010/12/16/disable-sudden-motion-sensor-mac/