Updated: 10/19/2017

Subscapularis

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Origin Subscapular fossa of scapula
Insertion Lesser tuberosity of humerus
Action Medially rotates arm and adducts it; helps to hold humeral head in glenoid cavity of scapula 
Innervation Upper and lower subscapular nerves (C5, C6 and C7) (C5, C6, C7) 
Arterial Supply Subscapular artery

 
 

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(OBQ06.179) The lift-off test evaluates internal rotation of the shoulder with the hand placed behind the back. During this test, which muscle exhibits the highest percent of maximal contraction? Review Topic | Tested Concept

QID: 365
1

Subscapularis

96%

(3429/3565)

2

Pectoralis major

1%

(28/3565)

3

Pectoralis minor

0%

(16/3565)

4

Latissimus dorsi

1%

(31/3565)

5

Supraspinatus

1%

(42/3565)

L 1 C

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