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It is believed that there is no such organ
or part in the human body which can be
labeled as a less important structure.
Each part contributes to the process of
building the body stability as well as
strength through a list of swift movements
that are required. In case of shoulder too
there is no exception.
It is one of the most movable joints that
is unstable too because of the vast range
of motions performed by the same. As a
result shoulder is likely to get affected
due to the several joint injuries some of
which are major in nature and take time to
show recovery.
Three bones namely the Collarbone
(Clavicle), the Shoulder Blade (Scapula),
the Upper Arm Bone (Humerus) and
ligaments, muscles, tendons are associated
with the structure of a human shoulder.
The shoulder is required to be mobile
enough for the various actions performed
by the arms and hands. At the same time it
is also essential for the human shoulder
to be stable to allow the human body doing
actions like lifting, pulling and
pushing.
An error in the interrelation between
stability and mobility sometimes affect
the shoulder badly and often lead to
certain problems that are not faced by
other joints of the human body like hip.
Shoulder Joints -
1)
Glenohumeral Joint - Being the
main joint, this ball and socket joint of
human shoulder is capable enough to allow
arm's rotation in circular way.
2) Acromioclavicular Joint -
Arms are raised above the head with the
help of this pivot joint. It mainly aims
at giving the arms a greater degree of
movement rotationally.
3) Sternoclavicular Joint - This
saddle like joint allows Clavicular
movements, especially in vertical planes
and anteroposterior. This joint allows the
movement of the arm and shoulder to thrust
forward.
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