Shoulder Girdle

Question 1

Trapezius

Answer 1

O: Occipital Protuberance, Nuchae Ligament, Spinous Process of
C7-T12

I: Spine of the Scapula,
Acromion, Lateral 1/3 of the Clavicle

A: Upper Trap:
Elevates Scapula

Middle Trap:
Retracts Scapula

Lower Trap:
Depresses Scapula

Upper and Lower Trap:
Upward Rotation of the Scapula

N: Spinal Accessory Nerve (CN XI)
(C3-C4)

Question 2

Levator Scapulae

Answer 2

O: Transverse Process of C1-C4

I: Superior Angle of Scapula, Proximal Medial Scapula

A: Elevates the Scapula, Lateral Flexion of Cervical Spine, Downward Rotation of Scapula

N: Dorsal Scapular Nerve (C3-C5)

Question 3

Rhomboid Major and Minor

Answer 3

O: Spinous Process of
C7-T5

I: Vertebral Border of the Scapula

A: Elevates the Scapula, Retraction, Downward Rotation

N: Dorsal Scapular Nerve (C4-5)

Question 4

Pectoralis Minor

Answer 4

O: Anterior Surface of Ribs 3-5

I: Coracoid Process

A: Depression, Protraction, Downward Rotation

N: Medial Pectoral Nerve (C6-T1)

Question 5

Serratus Anterior

Answer 5

O: Anterolateral Surface of Ribs 1-8

I: Anteromedial Border of the Scapula

A: Protraction, Depression, Upward Rotation

N: Long Thoracic Nerve (C5-7)

Question 6

Deltoid

Answer 6

O: Lateral 1/3 of Clavicle, Acromion,
Spine of the Scapula

I: Deltoid Tuberosity

A: Abduct Arm, Flexion (ant. fibers), Internal Rotation (ant.), Extension (post. fibers), External Rotation (post.)

N: Axillary Nerve (C5-6)

Question 7

Pectoralis Major

Answer 7

O: Medial Clavicle, Sternum, Costal Cartilage of Ribs 1-6

I: Lateral Lip of the Bicipital Groove

A: Adduction, Internal Rotation, Horizontal Flexion, Extension from flexion (sternal fibers)

N: Medial Pectoral Nerve (C7-T1), Lateral Pectoral Nerve (C5-7)

Question 8

Latissimus Dorsi

Answer 8

O: Spinous Process of T6-12, Lumbar and Sacral Processes, Posterior Iliac Crest, Thoracolumbar Fascia

I: Medial Lip and Floor of Bicipital Groove

A: Extension, Adduction, Internal Rotation

N: Thoracodorsal Nerve (C6-8)

Question 9

Teres Major

Answer 9

O: Inferior Angle of the Scapula

I: Medial Lip of Bicipital Groove

A: Extension, Adduction, Internal Rotation

N: Subscapular Nerve
(C5-6)

Question 10

Subclavius

Answer 10

O: 1st Rib

I: Underside of Clavicle

A: Depression of Clavicle, Stabilizes Sternoclavicular (SC) Joint

N: Nerve to Subclavius
(C5-6)

Question 11

Coracobrachialis

Answer 11

O: Coracoid Process

I: Medial Side of Middle Humerus

A: Flexion, Adduction

N: Musculocutaneous Nerve (C5-7)

Question 12

Supraspinatus

Answer 12

O: Supraspinatus Fossa

I: Greater Tubercle of the Humerus

A: Abduction, Stabilizes GH Joint

N: Suprascapular Nerve (C5-6)

Question 13

Infraspinatus

Answer 13

O: Infraspinatus Fossa

I: Greater Tubercle of the Humerus

A: External Rotation, Stabilizes GH Joint

N: Suprascapular Nerve (C5-6)

Question 14

Teres Minor

Answer 14

O:Upper Axillary Border of the Scapula

I: Greater Tubercle of the Humerus

A: External Rotation, Stabilizes GH Joint

N: Axillary Nerve (C5-6)

Question 15

Subscapularis

Answer 15

O: Subscapular Fossa

I: Lesser Tubercle of the Humerus

A: Internal Rotation,
Stabilizes GH Joint

N: Upper Subscapular Nerve (C5-6), Lower Subscapular Nerve
(C5-6)