When Lee Edge celebrated his 13th birthday at home with his friends three months ago, he blew out the candles on the birthday cake and enjoyed himself like any other teenager.
The next day, Lee asked his mother why she had not bought him a cake - he just couldn't remember it.
Lee suffered a brain injury when he was hit by a car as he crossed the road with friends near his home in Kings Heath in May last year. He was in a coma for a week and his parents, George and Sandra Edge, feared for his life.
Mrs Edge, said: "Even the police at the scene said they didn't think he would make it, and because he was unconscious for so long we kept thinking that was it."
After 12 days in hospital, Lee opened his eyes and moved his arms and legs in response to commands, but he was still not fully orientated.
The true impact of his injuries only began to unfold as Lee was transferred to hospital. He seemed like a different person and his behaviour and language became aggressive.
A month after his accident, Lee was discharged and brought home. His family struggled and Sandra had to gave up her job as a shop assistant to care for Lee.
"Now when Lee's manner is aggressive he is a completely different character and he can't be reasoned with," said Mrs Edge. "His temper is terrible. Before the accident Lee would rarely lose his temper. I now feel that we have to walk on eggshells with Lee because he can just fly off the handle at any moment.
"People say we are lucky we still have him, and we are, but he's not like our Lee. He is a completely different person. Before the accident he would come and give me a kiss if he saw me in the street. Now I am lucky if he even looks at me.
"At teatime he will tell you he didn't have lunch, but you know he did. He probably thinks we are neglecting him but it's not us, it's just that he forgets things.
"Sometimes you can speak to him and when you ask what you have just said, he can't remember. He has difficulty sleeping and wakes up during the night. If he is over-tired he can lose his balance."
Lee recently returned to school part time but his concentration has been affected. Mrs Edge is looking for a play scheme he can join during the school holidays but can't find anywhere that will accept him because of his injuries.
She said: "He has his good weeks and his bad weeks. He's up and down and we never know how he's going to be from one day to the next.
"All his friends have fallen out with him and he can be quite aggressive. I really feel for him because he just can't understand why he's got no friends.
"When he is having a bad day we have to keep him away from his sister, Katie. Although Katie is 16, Lee is much bigger than her so one push from him and she would be out for the count.
"Part of the problem is that you can't tell he has had an accident. He has a few scars but looks completely normal, so people think he is fine, but the damage is inside, not outside."
The family's solicitor, Gina Heather, of Alexander Harris, secured compensation to help Lee's family cope.
She said: "This has been a very difficult time for Lee and his family. Help and support for brain injury survivors is often not easy to access and we hope that this week, awareness will be raised as to the effects of brain injury.
"Compensation helps to put in place support mechanisms to help a person with a brain injury, their families and carers cope. However, not everyone is able to make a claim for compensation and they can often find it difficult to rely on family, friends and the State for support."
Organised by the brain injury association Headway, Brain Injury Awareness Week promotes a greater understanding of the issues affecting people who have suffered a brain injury, their families and carers.
The 2005 campaign focuses on the launch of the National Service Framework, which outlines a range of quality standards for improved health and social care services for people with long term neurological conditions including brain and spinal injury.
* For more information, contact Headway on 0808 800 2244 or visit www.alexanderharris.co.uk