Muscles – Upper

Question 1

Pectoralis major

Answer 1

Origin: Clavicle, sternum, ribs 1-6
Insertion: Intertubucular sulcus of humerus
Action: Flexion, adduction, medial rotation of humerus

Question 2

Pectoralis Minor

Answer 2

Origin: Ribs 3-5
Insertion: coracoid process of scapula
Action: Forward lateral movement of scapula, rotates scaula and depresses apex of shoulder

Question 3

Serratus Anterior

Answer 3

Origin: Ribs 1-8
Insertion: Medial border of scapula
Action: Forward lateral movement of scapula, rotating scapula to elevate apex of shoulder, stabilization

Question 4

Trapezius

Answer 4

Origin: Occipital protuberance, c1 + spinous process of C1-T12
Insertion: Acromion + scauplar spine
Action: Elevates and depresses apex of shoulder, rotate + retract scapula

Question 5

Latissimus dorsi

Answer 5

Origin: Iliac crest, spines of T6-12, L1-L5
Insertion: Intertuburcular groove of humerus
Action: Adducts + medially rotates humerus, extends shoulder, backward swing of arm

Question 6

Rhomboid major

Answer 6

Origin: Spine T2-T5
Insertion: Medial border of scapula
Action: Retracts scapula

Question 7

Rhomboid Minor

Answer 7

Origin: Spine C7-T1
Insertion: Medial border of scapula
Action: Retracts scapula

Question 8

Deltoid

Answer 8

Origin: Clavicle, acromion, spine of scapula
Insertion: deltoid tuberosity
Action: Flexion and medial rotation of arm, abduction of arm, extenson and lateral rotation

Question 9

Supraspinatus

Answer 9

Origin: Supraspinatus fossa of scapula
Insertion: Greater tubercle
Action: abduction

Question 10

Infraspinatus

Answer 10

Origin: Infraspinous fossa of scapula
Insertion: Greater tubercle
Action: lateral rotation of humerus

Question 11

Teres minor

Answer 11

Origin: Lateral border of scapula
Insertion: Greater tubercle
Action: lateral rotation of humerus

Question 12

Subscapularis

Answer 12

Origin: Subscapular fossa
Insertion: Lesser tubercle of humerus
Action: Lateral rotation of humerus

Question 13

Teres major

Answer 13

Origin: Inferior angle of scapula
Insertion: Intertuburcualr groove of humerus
Action: extension and medial rotation of humerus

Question 14

Biceps brachii

Answer 14

Origin: Coracoid process, superior glenoid lip
Insertion: Radial tuberosity
Action: Supination of forearm, aids elbow flexion, slights houlder flexion

Question 15

Triceps brachii

Answer 15

Origin: Infraglenoid tubercle, radial groove on humerus
Insertion: Olecranon process
Action: Elbow extension, extension and adduction of humerus

Question 16

Brachialis

Answer 16

Origin: Humerus
Insertion: Ulnar tuberosity, coronoid process
Action: Elbow flexion

Question 17

Brachioradialis

Answer 17

Origin: Distal humerus
Insertion: Styloid process of radius
Action: Elbow flexion