Shoulder Origins/Insertions

Question 1

Triceps Brachii

Answer 1

Origin:
Long head - Infraglenoid tubercle of the Scapula
Lateral head - Proximal ⅓ posterior shaft of the humerus
Medial head - Distal ⅔ posterior shaft of the humerus

Insertion: Olecranon process of the ulna

Question 2

Biceps Brachii

Answer 2

Origin:
Long head - Supraglenoid tubercle of the scapula
Short head - the apex of the coracoid process of the scapula

Insertion: the radial tuberosity and bicipital aponeurosis into deep fascia overlying the common flexor tendon

Question 3

Subscapularis

Answer 3

Origin: Subscapular fossa of the scapula

Insertion: Lesser tubercle of the Humerus

Question 4

Teres Minor

Answer 4

Origin: Superior lateral border of the scapula; superior ⅔ of the dorsal surface

Insertion: the inferior facet of the greater tubercle of the humerus

Question 5

Infraspinatus

Answer 5

Origin: The medial ⅔ of the infraspinous fossa of the scapula

Insertion: The middle facet of the greater tubercle of the humerus

Question 6

Supraspinatus

Answer 6

Origin: The medial ⅔ of the supraspinous fossa of the scapula

Insertion: The superior facet of the greater tubercle of the humerus

Question 7

Teres Major

Answer 7

Origin: Inferior angle and inferior lateral border of the scapula; the inferior ⅓ on the dorsal surface

Insertion: Medial lip of the bicipital groove of the humerus

Question 8

Latissimus Dorsi

Answer 8

Origin: Spinous process of T7-L5, Posterior sacrum, and the posterior iliac crest all via the thoracolumbar fascia and the lowest 3-4 ribs and the inferior angle of the scapula

Insertion: Medial lip of the bicipital groove of the humerus

Question 9

Pectoralis Major

Answer 9

Origin:
Clavicular head - The medial ½ of the clavicle
Sternal head - Sternum, the costal cartilages of ribs 1-7 and the aponeurosis of the external abdominal oblique

Insertion: Lateral lip of the bicipital groove of the humerus

Question 10

Coracobrachialis

Answer 10

Origin: Coracoid process of the scapula; the apex

Insertion: The middle ⅓ of the medial shaft of the humerus

Question 11

Deltoid

Answer 11

Origin: The lateral ⅓ of the clavicle, acromion process, and the spine of the scapula

Insertion: Deltoid tuberosity of the humerus

Question 12

Subclavius

Answer 12

Origin: The first rib at the junction with its costal cartilage

Insertion: The middle ⅓ of the inferior surface of the clavicle

Question 13

Pectoralis Minor

Answer 13

Origin: Ribs 3-5

Insertion: the middle aspect of the coracoid process of the scapula

Question 14

Serratus Anterior

Answer 14

Origin: Ribs 1-9, anterolaterally

Insertion: Anterior surface of the entire medial border of the scapula

Question 15

Levator Scapulae

Answer 15

Origin: TVPs of C1-C4; the posterior tubercles of the TVPs of C3 and C4

Insertion: Medial border of the scapula, from the superior angle to the root of the spine of the scapula

Question 16

Rhomboid Minor

Answer 16

Origin: Spinous processes of C7-T1 and the inferior nuchal ligament

Insertion: Medial border of the scapula at the root of the spine of the scapula

Question 17

Rhomboid Major

Answer 17

Origin: Spinous processes of T2-T5

Insertion: Medial border of the scapula between the root of the spine and the inferior angle of the scapula

Question 18

Trapezius

Answer 18

Origin:
Upper - The external occipital protuberance, the medial ⅓ of the superior nuchal line of the occiput, the nuchal ligament, and the spinous process of C7
Middle - The spinous process of T1-T5
Lower - The spinous process of T6-T12

Insertion:
Upper - Lateral ⅓ of the clavicle and the acromion process of the scapula
Middle - Acromion process and spine of the scapula
Lower - The tubercle at the root of the spine of the scapula