Scapulohumeral Muscles Flashcards
Origin of Deltoid
Lateral 1/3 clavicleAcromionSpine of scapula
Insertion of deltoid
Deltoid Tuberosity
What innervates the deltoid?
Axillary Nerve
What does the deltoid do?
AbductionExtension (posterior deltoid)External Rotation (posterior deltoid)Flexion (anterior deltoid)Interal Rotation (anterior deltoid)
Origin of the teres major
Inferior scapular angle
What does the teres major do?
Adduction
Internal Rotation
Extension
What innervates the teres major?
Lower Subscapular Nerve
Insertion of the teres major
Medial lip of intertubercular sulcus
Origin of the supraspinatus
Suprascapular fossa
Insertion of the supraspinatus
Superior facet of greater tubercle of humerus
What innervates the supraspinatus?
Suprascapular Nerve
What does the supraspinatus do?
Abduction
Origin of the infraspinatus
Inferior scapular fossa
Insertion of the infraspinatus
Medial facet of greater tubercle of humerus
What innervates the infraspinatus?
Suprascapular Nerve
What does the infraspinatus do?
External Rotation
Origin of the teres minor
Upper 2/3 of lateral border of scapula
Insertion of the teres minor
Inferior facet of greater tubercle of humerus
What innervates the teres minor?
Axillary Nerve
What does the teres minor do?
ER and slight extension
Origin of the subscapularis
Subscapular fossa
What does the subscapularis do?
Internal rotation
Slight adduction
What innervates the subscapularis?
Upper and Lower subscapular nerves
Insertion of the subscapularis
Lesser tubercle of humerus