Actions Of The Scapular Muscles Flashcards by Naomi Johnson | Brainscape

Q

Deltoid (C5-6; anterior, middle and posterior portions)

A

Anterior: Flexion & Medial Rotation

Middle: Abduction

Posterior: extension & lateral rotation, horizontal extension (posterior) of humerus.

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Q

Supraspinatus (C4-6)

A

Initiates humeral abduction & Laterally rotates humerus; stabilizes the glenohumeral joint (reinforces superior aspect of joint capsule)

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Q

Infraspinatous (C5-6)

A

Lateral rotation of humerus; stabilizes glenohumeral joint

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Q

Teres Minor (C5-6)

A

Lateral rotation of humerus; stabilizes glenohumeral joint

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Q

Supscapularis (C5-6)

A

Medial rotation of humerus; stabilizes glenohumeral joint

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Q

Teres Major (C5-6)

A

Humeral Adduction, medial rotation & Extension

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