ponderingturtle
Orthogonal Vector
- Joined
- Jul 11, 2006
- Messages
- 54,545
LOL!
So yeah, if the patients are mentally retarded before they have half their brain disconnected, their IQ's don't change much after if they have it done when they're a kid.
For one many of them where quite old from the stand point of biological flexibility in their brain.
And with it being a treatment for seizures that cause massive brain dammage.
Results: The mean age at onset of seizures was 4 months, and the median age at surgery was 1.2 years. Children had failed to respond to 3.7 anticonvulsants prior to surgery and averaged 387 seizures/month. Forty-seven percent had complications (e.g., hemorrhage and hypertension) in the perioperative period; however, 81% are currently seizure-free, with 53% off anticonvulsants. Hemispherectomy type (anatomic versus functional versus hemidecortication) did not influence outcome. Age at onset of seizures did not predict seizure freedom; however, an older age at hemispherectomy was positively correlated. Postoperative hemiparesis was not more severe than before surgery. Cognitive outcome was not related to the age at operation, side of operation, or seizure freedom.
Conclusions: Children undergoing hemispherectomy presented at a young age and had frequent seizures for approximately 1 year but are now mostly seizure-free. Age at surgery did not have an adverse effect on either seizure or cognitive outcomes.
link
You can cut away half the brain of an infant with little effect on them long term. You can't do that with older children because they loose brain plasticity.
