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Figure 14. Image taken
from Burkhart, S.S., Morgan, C.D. and
Kibler, W.B. The disabled throwing
shoulder: spectrum of pathology Part III: The SICK scapula, scapular
dyskinesis, the kinetic chain, and rehabilitation. Arthroscopy 19(6),
650, 2003. The original caption reads: 'This pitcher has excellent
mechanics, with the arm abducted in the plane of the scapula and positioned
above the horizontal plane. This pitcher shows abduction in extension,
with angulation of the arm posterior to the plane of the scapula rather
than in the plane of the scapula. Note the "dropped elbow"
in this pitcher, causing the arm-body angle to drop below the horizontal.'
Note that this image shows a pitcher soon after stride foot contact,
and before arm cocking has been undertaken to any great extent. Therefore
it is not an unusual finding to have a reduced amount of arm abduction,
and an increased amount of arm horizontal abduction at this point
in the throwing cycle. |