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Re: missile throwers - changes at glenoid fossa

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  • Re: missile throwers - changes at glenoid fossa

    Hafa Ada'i from Guam!

    As I am new to the list, a brief intro. is in order:

    I am a physical anthropologist (Ph.D., U of Toronto; M.A., Univ. of
    Manitoba; B.Sc., Ball State Univ.), specializing in human osteology and
    biomedical anthropology. My human osteology interests include
    paleopathology and the interpretation of chronic motor activity patterns
    from 'overuse' remodeling changes at muscle, tendon and ligament attachment
    sites, patterns of osteoarthritic changes, articular joint
    extension/remodeling, etc.

    I am currently working on a collection of ancient human remains from Rota
    (Mariana Islands), in which one individual has a right glenoid surface
    (scapula) with a most unusual joint extension facet.

    One possiblity* is that the extension facet (infero-medial, not
    infero-dorsal, where 'beveling' has been documented as a 'marker' of
    handedness) was
    caused by slingstone throwing. One local archaeologist has become quite
    proficient at same, using replicas of the sling stones used by the
    indigenous people here (and in Rota) ........ and he uses a 'submarine'
    style of delivery.

    For those of you with experience in working with baseball pitchers
    and other 'missile' throwers, I am wondering if you know of injuries to
    the shoulder
    that are more likely to occur in a sidearm/submarine thrower than in a
    3/4 or overhand thrower?
    __________________________________________________ _________________

    * An alternative interpretation, suggested by a colleague, is that
    a subluxation - w/ the arm abducted - could have produced the joint
    extension/faceting.
    __________________________________________________ __________________

    Thank you for your consideration of this request.


    Gary Heathcote
    Anthropology Lab
    University of Guam
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