PIT - External Rotator Muscles

Question 1

Teres Minor

Answer 1

PA:
+ middle part of lateral border of scapula

DA:
+ inferior facet of greater tubercle of the humerus

N:
+ axillary nerve (C5*, C6)

A:
+ laterally rotate shoulder joint
+ helps hold humeral head in glenoid cavity of the scapula

Question 2

Infraspinatus

Answer 2

PA:
+ infraspinous fossa of scapula

DA:
+ middle facet of greater tubercle of the humerus

N:
+ suprascapular nerve (C5*, C6)

A:
+ laterally rotate shoulder joint
+ helps hold humeral head in glenoid cavity of the scapula

Question 3

Posterior Deltoid

Answer 3

PA:
+ lateral third of the clavicle
+ acromion and spine of the scapula

DA:
+ deltoid tuberosity of the humerus

N:
+ axillary nerve (C5, C6)

A:
posterior (spinal) part:
+ flexes the shoulder joint
+ laterally rotates the shoulder joint