The keyboard of my computer doesn't work

**** apple community, i have a very serius problem with my macbook.

Today, i iniciated my computer to start working as usual, but i discovered that my computer do not recognize the keyboard or the trackapd that are attached to it. These are not external devices, they are built in my computer. Also, my macbook tells me that she can not find a bluetooth keyboard/mouse. My Macbook is normal macbook model mid 2009, with OS X (Lion) 10.7.5.

Does anybody know how to fix this?

Thank you for your attention.