Scapulohumeral (Intrisic Shoulder) Muscles Flashcards

1
Q

Deltoid

A

Clavicular (anterior) part flexes and medially rotates shoulder joint; acromial (middle) part abducts shoulder joint; spinal (posterior) part extends and laterally rotates shoulder joint
nerve supply - axillary nerve
attachment: lateral third of clavicle; acromion and spine of scapula -> deltoid tuberosity of humerus

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2
Q

Supraspinatus

A

initiates and assists deltoid in abduction of shoulder joint and acts with other rotator cuff muscles
nerve supply - suprascapular nerve
attachment: supraspinous fossa of scapula -> greater tubercle of humerus

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3
Q

Infraspinatus

A

laterally rotate shoulder joint; help hold humeral head in glenoid cavity of scapula
nerve supply - suprascapular nerve
attachement: infraspinous fossa of scapula -> greater tubercle of humerus

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4
Q

Teres minor

A

laterally rotate shoulder joint; help hold humeral head in glenoid cavity of scapula
nerve supply - axillary nerve
middle part of lateral border of scapula -> greater tubercle of humerus

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5
Q

Teres major

A

adducts and medially rotate shoulder joint
nerve supply - lower subscapular nerve
inferior part of lateral border of scapula and posterior surface of inferior angle of scapula -> medial lip of intertubercular sulcus of humerus

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