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Post a Comment On: Bruce Charlton's Notions

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Blogger Jonathan said...

Another treatment to add to your list: a ketogenic diet is said to be effective at arresting the progress of Parkinson's in many, perhaps most, patients.

31 January 2012 at 07:57

Blogger Bruce Charlton said...

@Jonathan - maybe, I haven't looked at that one.

31 January 2012 at 08:55

Blogger Valkea said...

Charlton: "It looks as if L-dopa is just too powerful a drug (almost a pure neurotransmitter), and the brain responds by 'fighting' the drug - i.e. the brain's homeostatic mechanisms are seriously destabilised by L-dopa, and the patient veers between hyperstimulation and 'freezing'."

- Can this kind of prolonged overstimulation and destabilization cause psychosis? And if so, can you approximately estimate how large part of psychoses is caused or facilitated by stimulants?

31 January 2012 at 13:33

Blogger Bruce Charlton said...

@Valkea - yes, it sometimes causes psychosis - usually a delirium. L-dopa sometimes causes a hyper-stimulated state a bit like mania, aggressive, sometimes hypersexualized.

31 January 2012 at 14:03

Anonymous Anonymous said...

Another method which seems to be promising is deep brain stimulation. Electrodes are inserted into the brain so that one can stimulate a certain area of the brain via small currents. This way specific groups of neurons can be activated. Another method which could be used (and which has been tried out quite successfully in animals) is to implant embryonic dopaminergic neurons into the basal ganglia. It seems that the diffuse secretion of dopamin by these neurons mitigates some of the symptons of parkinson associated with the misfunction of the substantia nigra.
VLAI

31 January 2012 at 14:34

Blogger Bruce Charlton said...

@VLAI - well, poking electrodes into the brain etc is getting pretty desperate. The really amazing things is that so many people have these and other wholly experimental procedures done on them, will never even have tried ECT.

31 January 2012 at 15:23

Anonymous Anonymous said...

Peter S. said…

Is my (perfectly British) ‘four cups of tea a day’ habit – every four hours, like clockwork – a sufficient preventative against Parkinson’s disease, or do I need to shift over to the harder stuff? As for nicotine patches, it appears that Benedict Cumberbatch’s Sherlock has already put the method into practice…

31 January 2012 at 16:44

Blogger Ugh said...

When you touch on Big Pharma's role in drug treatment of this disease as opposed to physical I immediately consider the plight of diabetics forced into a long lifetime of maintenance with expensive supplies and drugs. Could there be a more perfect disease for profit? Parkinson's - usually - strikes the elderly so Big Pharma must strike while the iron's hot.

31 January 2012 at 17:32

Blogger Starets said...

I've been thinking about using nicotine/tobacco as a cognitive enhancer for the past year, but for a few reasons such as the cost and the addictiveness of tobacco/nicotine I haven't yet made the decision to start, other than the occasional experimental use of snus.

Initially I was interested in it to help with adult ADD. More recently, I'm recovering from a concussion, and concerned about the possibility of Chronic Traumatic Encephalopathy later in life. I wonder if tobacco/nicotine has any preventive usefulness for CTE. Based on a couple of experimental uses of snus, tobacco does seem to have a fairly significant positive effect on concussion symptoms.

Apparently tobacco/nicotine is preventive for some forms of dementia. I wonder if it has been researched for effectiveness with CTE. I suspect not. Concussion and CTE seem to be conditions that are not looked at to closely by the medical community.

31 January 2012 at 20:30

Blogger JR said...

What have I overlooked>

If L-dopa is so "strong", why not just reduce the dosage?

15 February 2012 at 00:05

Blogger LeonRover said...

Here is an excerpt from The Economist in 2000.

http://www.economist.com/node/374754

"Dopamine, however, has roles other than the generation of a feel-good factor. Both Parkinson’s and Alzheimer’s diseases, for example, are associated with a dopamine deficit. So attacking them with nicotine seems worth a try.

Pursuing this line of reasoning, Paul Newhouse, a psychiatrist at the University of Vermont, and his colleagues, have been administering the stuff to their Parkinson’s and Alzheimer’s patients. And they have, indeed, found that people with Parkinson’s disease are better able to stand up, walk and resume sitting following the administration of nicotine. They also saw enhanced learning and memory skills in these patients and in a group of people with Alzheimer’s disease that they tested. "

15 February 2012 at 01:49

Blogger Bruce Charlton said...

@JR - If L-dopa is 'too powerful' it may be for reasons discussed in this article by David L Horrobin

http://www.jrsm.rsmjournals.com/
content/93/7/341.full.pdf

The dose that is swallowed is only part of the story - after that the drug may go everywhere, including many places it is not wanted.

I suppose the analogy might be trying to bang in a thumb tack with a five pound iron mallet - the drug dose would represent how hard you hit the tack - very difficult to get right, either it does nothing or the tack is bent and flattened...

15 February 2012 at 05:49

Blogger Anneke Sergio said...

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21 September 2019 at 03:05