First of all, you should be commended for taking on the task of helping someone whose has sustained a brain injury.
If you are assisting a child, there are organizations geared to helping children affected by brain injury. Search the BIC Yellow Pages using the word "pediatric" or "children" or contact the applicable brain injury advocacy organization.
If you are assisting an adult with a brain injury contact the Family Caregiver Alliance for additional resources and guidance or the applicable national or international brain injury organization.
Find your local independent living center here for more information about services available to people living with disabilities.