Upper body origins and insertions

Question 1

Pectoralis Major

Answer 1

Origin: clavicle (sternal end), sternum, cartilage of ribs
Insertion: inter-tubercular sulcus and greater tubercle of hummers
Action: arm flexion, medial roation, adducts arm

Question 2

Deltoid

Answer 2

Origin: clavicle, acromion, spine of scapula
Insertion: deltoid tuberosity of humerus
Action: abduction - flexes, medially rotates arm, extends and laterally rotates the arm

Question 3

Latissimus dorsi

Answer 3

Origin: spines of lower thoracic vertebra
Insertion: inter tubercular sulcus of humerus
Action: arm extension, adducts and medially rotates the arm

Question 4

Teres major

Answer 4

Origin: Scapula
Insertion: inter-tubercular sulcus of humerus
Action: extends, medially rotates and adducts the arm

Question 5

Carocobrachilalis

Answer 5

Origin: coracoid process of scapula
Insertion: shaft of humerus
Action: flexes and adducts the arm

Question 6

Supraspinatus

Answer 6

Origin: supraspinous fossa
Insertion: greater tubercle of humerus
Action: abducts the arm

Question 7

Infraspinatus

Answer 7

Origin: infraspinous fossa
Insertion: greater tubercle of the humerus
Action: laterally rotates the arm

Question 8

Teres minor

Answer 8

Origin: later border of scapula
Insertion:greater tubercle of the humerus
Action: laterally rotates the arm

Question 9

Subscapularis

Answer 9

Origin: subscapula fossa of scapula
Insertion: lesser tubercle of the humerus
Action: medially rotates the arm

Question 10

Tricep brachii

Answer 10

Origin: long head –> infraglenoid tubercle of scapula, medial and later heads –> shaft of humerus
Insertion: olecranon of ulna
Action: extends

Question 11

Brachialis

Answer 11

Origin: humerus
Insertion: coronoid process of ulna
Action: flexion

Question 12

Bicep brachi

Answer 12

Origin: short head –> caracoid process, long head –> supraglenoid tubercle
Insertion: radial tuberosity
Action: flexes and supinates the forearm

Question 13

Brachioradialis

Answer 13

Origin: later supracondylar ridge of humerus
Insertion: styloid process of radius