K.N.
(I figure that, if you've been told he has scar tissue there, then he is already under the care of a pediatric neurologist. Probably would require a MRI to get that determination...)
I've heard that some infants can suffer a head injury during childbirth which can cause brain bleeding... This in turn can cause scar tissue at the site where the bleeding occurred. Some children may develop learning disabilities, others do not... Depends on where the scar tissue is and how severe.
For extremely young infants, one thing to look for is eye movement & development. Other aspects to look for are how well the child hits various developmental milestones... walking/balance, hearing and speech, vision.
I recall reading some articles once that said a child's brain can often rewire itself to bypass areas of injured or impaired brian tissue. You may want to encourage your daughter to put her son on high quality children's **DHA & Omega 3 supplements** (DHA = for nervous system development and brain tissue development). High quality DHA should bear a certification on the packaging that pollutants/lead/mercury has been filtered out of the fish oil.
Nordic Naturals and Animal Parade brands have high-quality children's DHA supplements. However, you don't want your grandson to get too much fish oil in his diet, as too much on a longterm basis can interfere with circulatory function and clotting. If the back of the supplement bottle is geared for a 4-year old, then I give my daughter half of that recommended daily dose.
I also have read articles that advise individuals who have suffered an injury to the brain to avoid activities that could result in a headbump to that same area... What would be an irrelevant head bump to someone without a previous brain injury could be catastrophic to someone who has scar tissue on the area that was 'bumped'... So, maybe your daughter should steer your grandson to avoid playing soccer (and hitting the ball with his head!) and be a swimming star instead?!
Below are some links on DHA and Omega-3. (Hope it helps!)
http://www.diseaseproof.com/archives/supplements-dr-fuhrm...
http://www.dailymail.co.uk/health/article-389362/Which-fi...
www.lifesdha.com/Adults/FAQs.aspx
DHA, docosahexaenoic acid, is an omega-3 fatty acid. DHA is found throughout the body and is most abundant in your brain, eyes and heart. 60% of your brain is fat and DHA is the primary structural fat in both the brain and the retina. DHA is important for optimal brain and eye development in infants and has been shown to support brain, eye and heart health throughout life.