Dance Anatomy & Kinesiology

398 Dance Anatomy and Kinesiology

7.23 (Kreighbaum and Barthels, 1996; Levangie and

Norkin, 2001). This upward rotation of the scapula

not only allows the arm to reach a greater height but

also moves the acromion process out of the way as the

greater tubercle of the humerus approaches it with

abduction (Kreighbaum and Barthels, 1996). This

latter function is vital for preventing impingement.

Other commonly linked movements between

the humerus and scapula in an upright position are

listed in table 7.3. Note that there is a logical link-

ing where opposite movements of a movement pair

of the glenohumeral joint are linked with opposite

movements of the scapula. For example, glenohu-

meral abduction is linked with scapular upward

rotation, while glenohumeral adduction is linked

with scapular downward rotation; glenohumeral

flexion is linked with scapular abduction and upward

rotation, while glenohumeral extension is linked

FIGURE 7.21 Winged scapula. (A) Posterior view, (B) lateral view; due to (C)-(E) inadequate serratus anterior function

or (F)-(H) inadequate trapezius function.