The "hyperactivity element" is an =artifact= of the elevated TD E/I that is
imposed externally, and which prevents the development of long-term
active-phase experience, which weakens, or flat-out prevents, the 'normal'
passiv->active dominance behavioral transition, the absence of which is all
that 'adhd' is.
The "hyperactivity element" is 'just' what happens in the absence of robust
active-phase [motor-dominant] experience and correlated development - in the
absence of inwardly-generated directionality, behavior 'floats' upon the
'sea' of sensory experience. [Modern electronic-gadget stuff, including TV,
that imposes behavioral passivity [sensory-dominance] augments these
dynamics. If folks compare pre-TV brains with contemporaneous brains,
they'll find generalized correlated modifications [this can be accomplished
through modern scanning techniques with subjects from low- and high-tech
populations].
I see folks imposing such on their pets quite commonly. What's Sorrowful is
that I also see folks imposing such upon their Children even more commonly.
It's one of the things that NDT's understanding is going to Fix
[eventually]. [If it ever is allowed publication :-]
ken [k. p. collins]
"John H." <johnh at faraway.com.au> wrote in message
news:3fbe0bb3$1 at dnews.tpgi.com.au...
> Actually I iterated the same point to some friends, that the changes seen
> may reflect under utilisation as a consequence of ADHD. Moreover, the
> changes noted in this article do not appear to take into account the
> hyperactivity element. I'm rather ignorant about ADHD but suspect the
> midbrain is the region to look at (caudate\putamen), Nacc, or VTA seem
more
> probable.
>> Hobby horses are fun except when they kick you out of the saddle.
>> John H.
>> "Matthew Kirkcaldie" <Matthew.Kirkcaldie at removethis.newcastle.edu.au>
wrote
> in message
> news:Matthew.Kirkcaldie-68C229.17514721112003 at seagoon.newcastle.edu.au...> > In article <3fbd9960 at dnews.tpgi.com.au>,
> > "John H." <johnh at faraway.com.au> wrote:
> >
> > > Another myth bites the dust, though the evidence of ADHD being a real
> > > condition has rarely been in dispute by those who read the research.
> > > Hopefully this finding will further our understanding of this
condition,
> > > which I have no hope of understanding.
> > >
> > >
> > > John H.
> > >
> > > http://news.bbc.co.uk/2/hi/health/3284629.stm> > >
> > > Scientists have found differences in the brains of children with
> > > attention-deficit hyperactivity disorder.
> > > University of California Los Angeles researchers found some areas of
the
> > > brains of the children were smaller, and but others had more grey
> matter.
> > >
> > > .....
> >
> > London cabbies have different grey matter volumes in the hippocampus
> > than matched controls. As far as I know, nobody has used this to argue
> > that cabdriving is genetically controlled, or that being a taxi driver
> > is a "real condition".
> >
> > My point being, if a child behaves consistently differently, or is given
> > neuroactive drugs for a long period, their experience of the world
> > differs. That difference can show up in brain structure, without the
> > need for a genetic or pathological basis. If you raise a kitten with
> > one eye closed, the large scale structure of its visual cortex is
> > radically different, despite the lack of a genetic difference or a
> > pathogen.
> >
> > This is one of the most common misconceptions about brain development -
> > and it's common because it's very subtle and perhaps counterintuitive.
> > However, if we regard the brain as an organ whose primary function is to
> > adapt its structure to the experience it receives, the issues become
> > clearer.
> >
> > I'll get off my hobbyhorse, this is a topic I frequently get into when
> > lecturing!
> >
> > Cheers,
> >
> > Matthew.
>>
