Talk:Vastus medialis

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It would be good if the article cited a source for the claim that the VMO is a "clinical myth." Speedarius (talk) 08:36, 23 January 2008 (UTC)

Yes, Speed, it would be. Especially since this statement "Unfortunately careful inspection of many cadavers reveals that the fibres of the Vastus Medialis are largely parallel and there is no significant separate aspect of the contractile fibres fitting this description which would suggest it is time to lay this clinical myth to rest." seems to be false, according to the reference (2) and the following article

JC Goh, PY Lee, K Bose - Journal of Bone & Joint Surgery, British Volume, 1995 - JBJS (Br)

The references that are in the wiki, [1] and [2], are misplaced.

Someone who knows something about this needs to revamp it. Currently it is very biased, without any substantiaiting info. And there is plenty of literature on this topic. Reference 2 is interesting, but it goes against many other sources. Hwinnian (talk) 20:33, 23 April 2009 (UTC)

The abbreviation VMO is introduced without explanation half way down the article. Is it the same as Vastus medialis? What does the O stand for?

Expert needed
What's the deal - does the VMO exist? what does it do? Aaadddaaammm (talk) 13:52, 8 April 2010 (UTC)

See this reference: Clin Orthop Relat Res. 2009 Dec;467(12):3297-306. Epub 2009 Aug 19. Clinical anatomy of the quadriceps femoris and extensor apparatus of the knee. Waligora AC, Johanson NA, Hirsch BE.

No VMO was found... —Preceding unsigned comment added by 134.58.253.57 (talk) 18:45, 8 December 2010 (UTC)

But see: http://www.ncbi.nlm.nih.gov/pubmed/19090000. There doesn't seem to be great evidence either way. Regardless, it's a point of fact and evident in dissections that the fibers of the vastus medialis (whether one component or two) are obliquely oriented. Furthermore, the angle at which the vastus medialis attaches to the common quadriceps tendon does correlate with patellofemoral joint pain: http://www.ncbi.nlm.nih.gov/pubmed/19521000. Ultrasound technique validated here: http://www.ncbi.nlm.nih.gov/pubmed/22819896. Of course, this does not prove causality - the predictive and interventional studies so far are not of sufficient quality to provide that kind of evidence. The field simply isn't that far yet.

The following statement by the article author is meaningless: "The biomechanical cause of patellofemoral pain syndrome is unknown and may have more to do with weakness of extensors of the hip (i.e. gluteus maximus), which causes subsequent unusual internal rotation of the femur." Clearly there are multiple factors at play in the pathogenesis of patellofemoral joint pain. However, the best study I can find that considers multiple factors together shows that knee extensor strength is most significant: http://www.ncbi.nlm.nih.gov/pubmed/22031622. This finding was replicated here: http://www.ncbi.nlm.nih.gov/pubmed/23016077. But see: http://www.ncbi.nlm.nih.gov/pubmed/22815424 - identifying both knee extension torque and hip abduction and external rotation strength as factors.

The following study: http://www.ncbi.nlm.nih.gov/pubmed/22244738 shows that the following statement is misleading: "however since approximately 70% of the contractile fibres attach directly to the common extensor tendon (which then inserts centrally to the superior patella) the functional ability to achieve this goal may be overstated, and is likely dwarfed by the bony congruence of the patella in the trochlea notch." Note that in the abstract, the authors state that it does not explain 100% of the variance. This is a complex biomechanical problem, but the evidence suggests that the oblique fibers of the vastus medialis are important in its pathogenesis.

The editing process for Wikipedia is Byzantine to me, but hopefully this talk page contribution helps somebody who knows how the politics of all this works. 129.22.124.197 (talk) 05:46, 27 October 2012 (UTC)

Proposed merge with Obliquus genu
Short, unsourced stub that would be better covered in the body of the main article, with the context it gives LT910001 (talk) 06:46, 26 May 2014 (UTC) ✅

Move discussion in progress
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