Welcome to the Podiatry Arena forums

You are currently viewing our podiatry forum as a guest which gives you limited access to view all podiatry discussions and access our other features. By joining our free global community of Podiatrists and other interested foot health care professionals you will have access to post podiatry topics (answer and ask questions), communicate privately with other members, upload content, view attachments, receive a weekly email update of new discussions, access other special features. Registered users do not get displayed the advertisements in posted messages. Registration is fast, simple and absolutely free so please, join our global Podiatry community today!

  1. Have you considered the Clinical Biomechanics Boot Camp Online, for taking it to the next level? See here for more.
    Dismiss Notice
Dismiss Notice
Have you considered the Clinical Biomechanics Boot Camp Online, for taking it to the next level? See here for more.
Dismiss Notice
Have you liked us on Facebook to get our updates? Please do. Click here for our Facebook page.
Dismiss Notice
Do you get the weekly newsletter that Podiatry Arena sends out to update everybody? If not, click here to organise this.

Question about RCSP NCSP definition !

Discussion in 'Biomechanics, Sports and Foot orthoses' started by Petcu Daniel, Aug 26, 2010.

  1. Petcu Daniel

    Petcu Daniel Well-Known Member


    Members do not see these Ads. Sign Up.
    Sorry if I have a stupid question !
    We have two definitions :
    -The NCSP is defined as the position of the calcaneal bisection relative to the ground with subtalar joint in neutral position
    -The RCSP, represents the frontal plane position of the rearfoot, in relation to the supporting surface, when the patient is standing in their angle and base of stance, in a completely relaxed position

    But , in practice, the NCSP and RCSP are expressed as the angle between calcaneal bisection in relation to a vertical line to supporting surface !

    What means RCSP = 2° when we measure the position of the calcaneal bisection "in relation to the supporting surface" ?

    I don't understand ! Where is my mistake ?



    Thank you!

    Daniel
     
  2. Craig Payne

    Craig Payne Moderator

    Articles:
    8
    I just think you tied up in pedantics ... generally, the ground = supporting surface
     
  3. Jeff Root

    Jeff Root Well-Known Member

    Two degrees inverted or everted? You need to know this! So if the RCSP is 2 degrees inverted to the floor (ie supporting surface), the heel bisection line is 2 degrees inverted relative to a line which is perpendicular to the floor. Is that what you’re asking? It is measured with a protractor or an angle finder. The left and right RCSP would be opposite in direction if the patient was standing 2 degrees inverted, bilateral.
     
  4. I think I understand the question!!

    I think what Daniel is saying is that the rearfoot bisection, if measure against the ground (supporting surface) it should actually be expressed as 88 degrees or 92 degrees. Which actually is quite true when you get right down to it!

    So actually, when we talk bisections, we are not talking about the angle of the heel relative to the ground, we are talking about the relationship of the heel to a vertical line perpendicular to the ground.

    So, daniel, if those definitions are lifted from a textbook, they are both wrong and you are quite right, and a clever B****d for spotting it!:drinks

    Amazing how the people who lead with "this is probably a stupid question" ask the best questions.

    Regards
    Robert
     
  5. Petcu Daniel

    Petcu Daniel Well-Known Member

    Thanks a lot Robert ! You have explained better than me the sense of my question !
    I have made a mistake when I've underlined only the words related to "ground" and "supporting surface" and, involuntary, I've created a confusion. I apologize for this !
    I have seen these definitions in many reference articles and I was a little confused !
    So, if my question and the Robert's answer are both right, this means that the definition of these parameters has to be changed, isn't it ?
    Of course, only if these parameters are still used !

    Regards,
    Daniel
     
  6. Hey Daniel.

    You phrased it better in English than I could in Romanian so I would''nt worry!

    I'll be interested to check some textbooks for the definition of RSCP. If they are as you stated, then you've raised a very good point!

    Cheers
    Robert
     
  7. Petcu Daniel

    Petcu Daniel Well-Known Member

    Hello Robert,

    I'll send you some references in order to verify !

    Thank you,
    Daniel
     
  8. Don't be shy, post em up here for everyone!
     
  9. Petcu Daniel

    Petcu Daniel Well-Known Member

    Here are some references which I have access at the moment:

    -Kevin Kirby, Donald Green, "Evaluation and Nonoperative Management of Pes Valgus", in Foot and Ankle Disorders in Chilren - RCSP definition at page 311 and NCSP definition at page 312,
    - Raymond Anthony, "The Manufacture and Use of the Functional Foot Orthosis" ,- I don't have in this moment access to the book !
    - RxLaboratories, "Guidelines on Rx Writing for Functional Foot Orthoses" definition of NRSP and RRSP, page 3 http://www.rxlab.co.uk/downloads/pdf/protocols.pdf
    - Séamus Kennedy, "Considerations for Biomechanical Evaluations" http://www.oandp.com/articles/2010-08_07.asp
    "RCSP is a visual check of the calcaneal bisection to the ground when the patient is standing and relaxed and there are no compensations present"

    - Do-Young Jung ,"Effect of Medial Arch Support on Displacement of the Myotendinous Junction of the Gastrocnemius During Standing Wall Stretching", volume 39, number 12, december 2009 JOSPT, "The RCSP was quantified by measuring the posterior bisection line of the heel in relation to the ground, using a gravity goniometer ", page 868



    A good definition for RCSP and NCSP: "Assessment of foot posture": https://www.latrobe.edu.au/podiatry/...ssFootPost.doc


    Thank you,
    Daniel
     
  10. Daniel:

    NCSP stands for neutral calcaneal stance position and is defined as the position of the calcaneal bisection of the foot relative to the perpendicular (i.e. 90 degrees to the ground) while the subtalar joint is in its neutral position.

    RCSP stands for relaxed calcaneal stance position and is defined as the position of the calcaneal bisection relative to the perpendicular while the foot is in the relaxed bipedal stance position.

    The terms "ground" and "supporting surface" in this context are synonymous.

    Hope this helps.:drinks
     
Loading...

Share This Page