There was permanent damage to my left temporal and basal frontal lobes in the accident 30 years ago. Temporal evidences as harder to find words and remember words and numbers (although I wrote for a living so had work-arounds). Frontal lobe damage was that emotions were quicker and closer to the surface, and smell and taste took about 8 years to totally rewire. Rewiring is slow and takes a lot of effort. There were no other physiological problems. Mental problems...I refered to it as the year from hell (technically 1.5 years). Trying to get back to who you were and dealing with people that give you 3 weeks to recover is emotionally wrenching. It is important to have friends that allow you to heal, particularly with a head injury your world shrinks and so much that is going on around you is missed. I learned a great deal during my recovery, about myself and how the brain works and rewires.