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blooiejagwa
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30 Dec 2019, 9:41 pm

MrsPeel wrote:
The latest I heard was it's mostly genetic - they tested identical twins and found if one had autism the other had 96% chance of having autism also. The weird thing was that the twins often had autism at different levels of severity and displayed different behavioural traits.
So it's like you're born with autism, but there's a lot of variation in how the autism affects you, and nobody quite has a handle on why that is.


wow. they also found if one sibling has OCD then the other sibling is many times (forgot number) more likely to have Autism. and that holds true in my family


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CarlM
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30 Dec 2019, 11:01 pm

MrsPeel wrote:
The latest I heard was it's mostly genetic - they tested identical twins and found if one had autism the other had 96% chance of having autism also. The weird thing was that the twins often had autism at different levels of severity and displayed different behavioural traits.
So it's like you're born with autism, but there's a lot of variation in how the autism affects you, and nobody quite has a handle on why that is.

I just finished Temple Grandin's book "The Autistic Brain". Her brain has been much studied with MRI. Reading about the results gives me some understanding how there can be such variation in identical twins. What they found in her case was the cerebellum is 20% undersized and other brain structures grew larger as a result. I wonder if this compensation happens unpredictably and produces different brains in twins (but this is just my guess).


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blooiejagwa
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30 Dec 2019, 11:11 pm

i read studies that temple grandin also refers to, which show that in ASD (classic, severe) and aspergers, the hippocampus and amygdala are UNDERDEVELOPED (not damaged---i.e. no vaccine injury or other things like that,, but grew underdeveloped) compared to NTs.

however though they are both underdeveloped, the severe ASD people still overall have better emotional regulation and Aspergers have better cognitive functioning and fine motor etc.

because there is a distinction between the level of development that both categories have. so it proves scientifically that there is a definite link but also a huge difference and set of needs.


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Brehus
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01 Jan 2020, 7:28 am

AS has a tendency to run in families but can be caused by other factors.
Like for example one person I know who has AS was born premature and had jaundice which can significantly increase the chance of the child developing autism


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Lely
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01 Jan 2020, 3:09 pm

In my opinion it's genetic, one is born with it and it often runs in families.



SharonB
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01 Jan 2020, 7:25 pm

Brehus wrote:
AS has a tendency to run in families but can be caused by other factors.
Like for example one person I know who has AS was born premature and had jaundice which can significantly increase the chance of the child developing autism

How much of the example is correlation versus causation? thinking of my premature niece --- the only one diagnosed until I figured out what ASD really was and now see it (or BAP) in most women in the family (none of the others were premature, just the NT grandfather but it was his ASD-like mother who had the pregnancy...)



blooiejagwa
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01 Jan 2020, 11:04 pm

Lely wrote:
In my opinion it's genetic, one is born with it and it often runs in families.


my son's genetics team were able to send off for testing and unexpectedly:
identified genetic anomaly which is unaccounted for ...

which they believe might be a cause for our family's variation of autism.


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