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Rotator cuff responses

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  • Rotator cuff responses

    Thanks to all who responded. The replies were very helpful. Here is a
    posting of the responses for all who wanted them.

    It's a good list, I recommend saving it!



    There are very few studies detailing the mechanical properties of the
    rotator cuff. A couple of studies have looked at the supraspinatus
    tendon, but that's about it.

    Nakajima et al: Histologic and biomechanical characteristics of the
    supraspinatus tendon: reference to rotator cuff tearing. Journal of
    Shoulder and Elbow Surgery, 3:79-87, 1994.

    Itoi et al: Tensile properties of the supraspinatus tendon. Journal of
    Orthopaedic Research, 13:578-584, 1995.

    Hope this helps,

    Michael J. Bey
    Orthopaedic Research Laboratory
    University of Michigan
    G-161 N. Ingalls
    Ann Arbor, MI 48106
    (313) 647-1549
    __________________________________________________ _

    It is known that the supraspinatus tendon transmits 300N of force
    when the arm is 30 degrees abducted (Wallace 1984, proceeding of the
    Orthopaedic Research Society) and this tends to be the strength that
    implant manufacturers aim for with new anchors for cuff repair.

    Paul Manning
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~
    Paul Manning FRCS
    Tel.Office: +44 115 9513277
    Fax: +44 115 9513278
    Home: +44 115 9415607
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~

    i dont know how detailed you information needs to be, but i know the
    book "the
    athletes shoulder" is an excellent book. I hope that i have been

    __________________________________________________ ______

    Try Nordin and Frankle (not sure about the Frankle spelling) -
    biomechanics. They have good summaries of literature for major joints,
    well as the components (bone, tendon, muscle, cartlidge) and its in
    easy to read format. If you are interested, I can give you exact
    title etc. but I don't have it here at work.

    Bryan Kirking - Research Engineer
    Institute for Spinal Disorders
    Baylor College of Medicine
    __________________________________________________ _____


    You might try a search of the Journal of Shoulder and Elbow Surgery.
    You might also send an email request to Thay Lee at University of
    California Irvine (director of Biomechanics Research) who I believe has
    done research on the rotator cuff. I would be interested in receiving
    the response you get to this inquiry.

    John Brault, MS
    Biomechanics Research & Consulting, Inc.
    840 Apollo St.
    Suite 218
    El Segundo, CA 90245

    Phone: 310.615.3112
    Fax: 310.615.3038

    __________________________________________________ ______

    Hi John,

    You might want to try the Journal of Biomechanics Vol. 20, #2: 119-134
    157-166; 1987

    These papers are:

    1)On the biomechanics of human shoulder complex... Peindl and Engin

    2)Biomechanical model of the human shoulder-elements...Hogfors et al.

    Hope they help, I amy have more if you need EMG related or strength

    Daniel Benoit
    Bentek Movement Research
    Hamilton, Ontario
    __________________________________________________ ____

    I have done some research into the physiological aspects of rotator cuff
    injuries. I would look at any work done by ASMI (American Sports
    Institute), Jim Andrews, or Kevin Wilk. If there isn't any information
    within the articles, the citations at the end should provide some good
    references. If you would like, I can do some digging on my own.

    Good Luck,

    Phil Kujawa, ATC
    __________________________________________________ ____

    These might be useful for you--please post a summary.

    Bassett,RW, Browne,AO, Morrey,BF, An,KN Glenohumeral muscle force
    and moment
    mechanics in position of shoulder instability J Biomech 23 5
    405-415 1990

    Bechtol,CO Biomechanics of the shoulder Clin Orthop 146 37-41

    Bigliani,LU, Kelkar,R, Flatow,EL, Pollock,RG, Mow,VC Glenohumeral
    stability Am J Sports Med 330 13-30 1996

    Engin,AE On the biomechanics of the shoulder complex J Biomech 13
    590 1979

    Hart,DL, Carmichael,SW Biomechanics of the shoulder JOSPT 6 4

    Hughes,RE, An,KN Force analysis of rotator cuff muscles Clin Orthop
    75-83 1996

    Neagle,CE, Bennett,JB Subracromial anatomy and biomechanics related to
    impingement syndrome Operative Techniques in Sports Medicine 2 2

    Pratt,NE Anatomy and biomechanics of the shoulder J Hand Therapy

    65-76 1994

    Speer,KP Anatomy and pathomechanics of shoulder instability
    Techniques in Sports Medicine 1 4 252-255 1993

    Wood JE, Meek SG, Jacobson SG Quantitation of human shoulder anatomy
    prosthetic arm control--II. Anatomy matrices J Biomech 22 4
    309-325 1989

    Wood JE, Meek SG, Jacobson SG Quantitation of human shoulder anatomy
    prosthetic arm control--I. Surface modelling J Biomech 22 3
    273-292 1989

    Wuelker N, Wirth CJ, Plitz W, Roetman B A dynamic shoulder model:
    testing and muscle force study J Biomech 28 5 489-499 1995

    Burkhart SS, Nottage WM, Ogilvie-Harris DJ, Kohn HS, Pachelli A Partial
    of irreparable rotator cuff tears Arthroscopy 10 4 363-370 1994

    __________________________________________________ ______


    John Brault of our office was the Director of the Biomechanics Lab at
    the Kerlan/Jobe Orthopedic Clinic at Centinela Hospital. He has
    extensive research experience with the rotator cuff including fine wire
    EMG of the cuff muscles and shoulder complex during various activities.
    We have addressed rotator cuff injury mechanics in numerous forensic
    cases (automobile, sport/recreation, slip/fall). In 1996 we conducted
    low-speed rear-end collisions with live human subjects (see Stapp '97
    for kinematic results and Archives of Physical Medicine and
    Rehabilitation, January '98 for clinical results). At first one would
    not think rear-end collisions would present the proper injury
    mechanism. However, we have been looking at the torso forward rebound
    velocity (measured in our tests) as a potential contributor to rotator
    cuff injury causation in certain at-risk individuals in certain
    pre-impact postures. It is an interesting topic.

    Jeffrey B. Wheeler, M.S.
    Biomechanics Research & Consulting, Inc.
    Offices in Los Angeles and Denver
    LA ph(310) 615-3112 fax(310) 615-3038
    Denver ph(303) 670-2111 fax(303) 670-2444

    Thanks again!

    John C. Laughlin M.Eng.
    Rimkus Consulting Group, Inc.
    Forensic Department
    Eight Greenway Plaza, Suite 500
    Houston, Texas 77046

    Voice: (713) 621-3550
    Fax: (713) 623-4357