Changing the Channel: Court TV and Two Abstracts

I've never been a Court TV junky -- mostly because, you know, I've been busy being some other kind of junky -- Mwa ha ha ha!  Sorry, Beloved Readers, that's Street Drug Humor, something at which I am fantastically adept but have kept hidden as an attribute.  Now, though, I've decided not to hide my light under a basket. A bushel.  A bushel basket. Or whatever.

No, I am not suffering from Hinky Methadone Withdrawal.  What I am suffering from is this twit of a woman, this Casey Anthony person upon whom we are wasting such incredible resources of money, time, and emotion.  Yes, my television is tuned to her first-degree murder trial in Florida, where she is accused of having killed her two year old daughter back in 2008.   

Change the channel, you say?

Oh.  Right!

If I can redirect the miscued energy of a kitten, surely I can train myself to change the television channel -- even {gasp} turn the machine off.  Let's do that, then, and see what happens.

Why, look!  Here are some CRPS updates that I've failed to pass on.  Oh, and there is a Pink Elephant hanging from the ceiling fan!  (Just let me know when you've had enough Hinky Methadone Withdrawal humor.  Why are the lights blinking?)

This first research paper has a very specific target audience -- so, attention all orthopods!

The use of beta-tricalcium phosphate bone graft substitute in dorsally plated, comminuted distal radius fractures.Journal of Orthopaedic Surgery and Research

Michael G Jakubietz , Joerg G Gruenert and Rafael G Jakubietz
2011, 6:24
doi:10.1186/1749-799X-6-24


Published:  22 May 2011


Abstract (provisional)

Background:  Intraarticular distal radius fractures can be treated with many methods. While internal fixation with angle stable implants has become increasingly popular, the use of bone graft substitutes has also been recommended to address comminution zones and thus increase stability. Whether a combination of both methods will improve clinical outcomes was the purpose of the study


Methods:  The study was thus conducted as a prospective randomized clinical trial. 39 patients with unilateral, intraarticular fractures of the distal radius were included and randomized to 2 groups, one being treated with internal fixation only, while the second group received an additional bone graft substitute.


Results:  There was no statistical significance between both groups in functional and radiological results. The occurrence of complications did also not show statistical significance.


Conclusions:  No advantage of additional granular bone graft substitutes could be seen in this study. Granular bone graft substitutes do not seem to provide extra stability if dorsal angle stable implants are used. Dorsal plates have considerable complication rates such as extensor tendon ruptures and development of CRPS.

I know, I know -- where did that last line of the conclusion come from?  Is it really there or am I imagining things again?  Like I said, this has a definite target -- orthopedic surgeons -- and, well, I hope it doesn't keep any of them up at night!

Mwa ha ha ha!

Ahem.

Okay, on to something more "relatable," though not less specialized -- fixed dystonia in CRPS.  Just a few observations:  Classical dystonia is mobile;  Fixed dystonia is usually classified as part of functional movement disorders and is often labelled a contracture -- (though I think a better descriptor is fixed flexion postures);  All of that is code for "psychogenic."  Most studies will make quick mention that fixed dystonia happens mostly in females, many of whom suffer from dissociative and affective disorders. 

Sigh.

(Please note that I am sighing as I look down at my twisted and distorted foot... as I recall the initial days of CRPS, when my left hand looked like the infamous psychogenic claw!  I'm also flashing on some really cool concerts from back in the day, but that could be the DTs.  Mwa ha ha!)

So... once again, if you're a CRPS patient experiencing dystonia, be sure to see someone who is not going to automatically categorize you as a nut.  The authors of the study below are searching for an explanation beyond the easy and lazy classification of "functional," and posit that the neurotransmitters used by interneurons are misfiring or dysfunctional (he he).  If you are like me, you might want to start with this quick intro to interneurons!

Fixed Dystonia in Complex Regional Pain Syndrome: a Descriptive and Computational Modeling Approach

Alexander G. Munts, Winfred Mugge, Thomas S. Meurs, Alfred C. Schouten, Johan Marinus, G. LORIMER Moseley, Frans C.T. van der Helm and Jacobus J. van Hilten

BMC Neurology 2011, 11:53
doi:10.1186/1471-2377-11-53

Published: 24 May 2011

Abstract (provisional)

Background: Complex regional pain syndrome (CRPS) may occur after trauma, usually to one limb, and is characterized by pain and disturbed blood flow, temperature regulation and motor control. Approximately 25% of cases develop fixed dystonia. Involvement of dysfunctional GABAergic interneurons has been suggested, however the mechanisms that underpin fixed dystonia are still unknown. We hypothesized that dystonia could be the result of aberrant proprioceptive reflex strengths of position, velocity or force feedback.

Methods: We systematically characterized the pattern of dystonia in 85 CRPS-patients with dystonia according to the posture held at each joint of the affected limb. We compared the patterns with a neuromuscular computer model simulating aberrations of proprioceptive reflexes. The computer model consists of an antagonistic muscle pair with explicit contributions of the musculotendinous system and reflex pathways originating from muscle spindles and Golgi tendon organs, with time delays reflective of neural latencies. Three scenarios were simulated with the model: (i) increased reflex sensitivity (increased sensitivity of the agonistic and antagonistic reflex loops); (ii) imbalanced reflex sensitivity (increased sensitivity of the agonistic reflex loop); (iii) imbalanced reflex offset (an offset to the reflex output of the agonistic proprioceptors).

Results: For the arm, fixed postures were present in 123 arms of 77 patients. The dominant pattern involved flexion of the fingers (116/123), the wrists (41/123) and elbows (38/123). For the leg, fixed postures were present in 114 legs of 77 patients. The dominant pattern was plantar flexion of the toes (55/114 legs), plantar flexion and inversion of the ankle (73/114) and flexion of the knee (55/114). Only the computer simulations of imbalanced reflex sensitivity to muscle force from Golgi tendon organs caused patterns that closely resembled the observed patient characteristics. In parallel experiments using robot manipulators we have shown that patients with dystonia were less able to adapt their force feedback strength.

Conclusions: Findings derived from a neuromuscular model suggest that aberrant force feedback regulation from Golgi tendon organs involving an inhibitory interneuron may underpin the typical fixed flexion postures in CRPS patients with dystonia.

In other breaking news, "Ketamine induced selective impairments in timing..."

Put that in the No Kidding File. 

Well, folks, I'd better get back to my soon-to-be "Done"-less life.  I do hope you know I'm just joshing around about the difficulties of tapering off of methadone.  I am NOT having a hard time (yet) or experiencing anything I cannot deal with.  Just don't take away my ibuprofen.