Science Fair Project Encyclopedia
Accessory muscles of the scapula
There are only three accessory muscles of the scapula, and these are the Levator Scapulae Ventralis, Teres Major, and the Teres Minor.
Levator Scapulae Ventralis
The Teres Major is the stout muscle just below the infraspinatus muscle . Origin, axillary border of the scapula, Insertion, medial surface of the humerus, Action, rotates the humerus inward and lowers it.
The Teres Minor is situated just under the infraspinatus muscle. It is triangular-shaped. Origin, axillary border of the scapula, Insertion, greater tuberosity of the humerus, Action, assists the infraspinatus to rotate the humerus.
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