Shoulder Muscles Flashcards Preview

Muscle Origins and Insertions > Shoulder Muscles > Flashcards

Flashcards in Shoulder Muscles Deck (3)
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1
Q

Posterior Deltoid

A

Origin -
Inferior edge of the scapular spine

Insertion -
The deltoid tuberosity on the lateral surface of the proximal humeral shaft

Actions -
Extension of the arm at the shoulder
Assists with external rotation of the arm at the shoulder

2
Q

Anterior Deltoid

A

Origin -
Anterior border of the lateral third of the clavicle

Insertion -
The deltoid tuberosity on the lateral surface of the proximal humeral shaft

Actions -
Flexion of the arm at the shoulder

3
Q

Middle Deltoid

A

Origin -
Lateral border of the acromion process of the scapula

Insertion -
The deltoid tuberosity on the lateral surface of the proximal humeral shaft

Actions -
Abduction of the arm at the shoulder