brain lobes

Phineas Gage, American railroad construction foreman remembered for his improbable survival of an accident in which a large iron rod was driven completely through his head, destroying much of his brain’s left frontal lobe, and for that injury’s reported effects on his personality and behavior over the remaining twelve years of his life—​​effects sufficiently profound (for a time at least) that friends saw him as “no longer Gage.”

I was doing some random reading and apparently ADD/ADHD is caused by abnormalities in the frontal lobe of our brains. The frontal lobe controls speech, language, and motor function (I kind of fell in love with medical science while I was self diagnosing my ADHD). As I’ve gotten older, my ADHD symptoms have multiplied. At the same time I seem to have lost the perfect balance and coordination I loved when I was a kid. I’m not just talking getting old, here. I’m only 18 and yet I walk into walls/doorways, trip over thin air, and drop things all the time. Now either I have MS without the #1 symptom of weakness, or a theory that could explain it. The same damage that causes the ADHD could cause balance/coordination issues. I have a friend who’s got combined ADHD and she’s as clumsy as I am (though she blames it on her tiny feet). Since the frontal lobe controls language, it also explains why some of us mix up words and have trouble understanding speech. Again, it’s just a theory, but it makes sense to me. Anyone else unusually clumsy?

@eternally-thinking 


You’re talking about dyspraxia, which is a common comorbid disorder with ADHD. The frontal lobe also manages your executive functions, which are to do with things like impulsive behaviours and making plans and stuff like that.

-J

While it’s true that many of the functional deficits in ADHD are localized in the frontal lobes, it’s a huge over-simplification to say that ADHD is caused by frontal lobe abnormalities. Yes, the frontal lobes are involved in motor function and language processing (as well as executive functions like J said) but these processes are controlled through interaction with other areas of the brain. Different aspects of motor function are also controlled by the parietal lobe, basal ganglia and striatal pathways, and the cerebellum. Speech production happens in the frontal lobes while understanding speech and language processing largely happens in the temporal lobes. 

Although studies on ADHD have found abnormalities in the frontal lobes like smaller volume, less activation and less blood flow, this is not necessarily the case for everyone with ADHD. It is far more likely that ADHD is caused by interaction between genetics, neural anatomy, and environmental factors rather than just one thing like frontal lobe abnormalities.  Even then it’s not damage (unless of course ADHD symptoms were caused by an injury, which is also possible), just differences in neural structure and functions. 

It is possible that symptoms of dyspraxia appear with ADHD symptoms, but this is more likely because of differences in connectivity between the frontal lobes and areas that are actually more involved with balance and fine motor control, such as the cerebellum and basal ganglia than damage or abnormalities in the frontal lobes. 

-Becca

anonymous asked:

I have a character (who happens to be a cat, but that's not actually important. the universe of the story, a fanfiction, has human diseases and medicinal plants/techniques muddled with cat biology, so anything that works with people works minus surgery/metal instruments) who is blind in one eye But for the purposes of the story, her blindness needs to... shift? back and forth between eyes. Is there a disease or injury that could do this? I thought maybe ocular nerve damage, but idk. Thanks!

Hey there! I’ve never heard of blindness changing eyes from one to the other and back again. I’m not saying it’s impossible, but I’m not sure why you’d do it.

For blindness to occur, generally you need issues in one of 3 places:

1) The eye itself, which convert light into neural signals

2) The optic nerves (which are separate), which transmit those signals to the brain for interpretation

3) The brain, specifically the occipital lobe, where we process visual signals from the eyes and convert them into what we understand as our vision.

Here’s an illustration of the optic nerves:

So unfortunately I don’t see a way to cause blindness to “shift” from eye to eye.

On a slightly-unrelated note, this post about human/cat hybrids from my excellent friend @scriptveterinarian could be really helpful for your story! https://scriptveterinarian.tumblr.com/post/157139362544/common-infectious-diseases-of-feline-population

Best of luck and sorry I couldn’t be more helpful,

xoxo, Aunt Scripty

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@draw247 OC week day 7: write/draw about your newest OC

This is a WIP design for my highly self-indulgent Young Justice OC, Shiloh.

I invented her a while ago, but she’s still my “newest” OC in that I decided to stop giving a shit about respectability and actually include her in my official OC lineup last night.

Shiloh is how I personally explain the plot hole of Neutron not seeing the future change in s2ewhatever ep Impulse appears. 6, I think. Her powers allow her to travel to any point in time she has not yet existed in. So, like, she cannot be in the same time twice. But said powers take the form of an extra brain lobe that, unfortunately for her, acts rather like a malignant tumor. As she uses her powers, it grows, causing her seizures and loss of motor skills.

There’s more to this story, but it’s 1am, and I am clearly not up to quality art or text.

I did a craniotomy the other day & I literally saw half a brain...

the whole frontal lobe was gone, it was so damaged from the patient’s accident that the brain tissue became necrotic & just died, and it literally deflated. Well, the patient had pneumocephalus hence why the patient needed a craniotomy. But wow! It was amazing that this patient was still alert even though the patient has a tracheostomy, and responsive. It was amazing

And, I actually worked with a very nice, and funny neurosurgeon who also loves to teach, so that was just a great evening even though I worked overtime…it was worth it

No, but hear me out...

Were you bothered by Deucalion’s personality changes when he lost and regained his vision? Me, too, until I thought about what those arrows to the eyes would do.

Chances are that Deucalion suffered from frontal lobe brain damage, when the arrows pierced the upper edges of his orbitae. Frontal lobe damage will almost always cause a change in personality. The person in question may turn violent, stop caring about people around them, stop caring about social rules, et cetera. Look up Phineas Gage, if you want an example.

When Jennifer healed him, she healed the brain damage, too, and Deucalion turned into the person he was before. An Alpha, but a responsible one, a man who might keep his deals.

I’m not sure this was intentional, but it works for me.

  • Me: *names my son phineas*
  • Person: did you literally name your son after a Disney cartoon
  • Me: actually I named him after Phineas P. Gage, he was an American railroad construction foreman remembered for his survival of an accident in which a large iron rod was driven completely through his head, destroying much of his brain's left frontal lobe, and for that injury's reported effects on his personality and behavior over the remaining twelve years of his life—​effects so profound that (for a time at least) friends saw him as "no longer Gage."
  • Me: also I fucking love phineas and ferb