Upper Extremity Muscles

Question 1

Upper Fibers of Trapezius

Answer 1

Origin: occipital bone
Insertion: scapula
Action: elevation

Question 2

Middle Fibers of Trapezius

Answer 2

Origin: thoracic vertebrae
Insertion: scapula
Action: retraction

Question 3

Lower Fibers of Trapezius

Answer 3

Origin: thoracic vertebrae
Insertion: scapula
Action: depression

Question 4

Levatator Scapulae

Answer 4

Origin: C1-C4
Insertion: superior angle of scapula
Action: Elevation

Question 5

Rhomboid Minor

Answer 5

Origin: C7-T1
Insertion: medial border of scapula
Action: retraction

Question 6

Rhomboid Major

Answer 6

Origin: T2-T5
Insertion: medial border of scapula
Action: retraction

Question 7

Serratus Anterior

Answer 7

Origin: ribs
Insertion: medial border of scapula
Action: protaction

Question 8

Pectoralis Minor

Answer 8

Origin: ribs 3-5
Insertion: coracoid process
Action: protraction and depression

Question 9

Anterior Fibers of Deltiod

Answer 9

Origin: clavicle
Insertion: deltoid tuberosity
Action: shoulder flexion

Question 10

Middle Fibers of Deltoid

Answer 10

Origin: acromion process
Insertion: deltoid tuberosity
Action: shoulder abduction

Question 11

Posterior Fibers of Deltoid

Answer 11

Origin: spin of scapula
Insertion: deltoid tuberosity
Action: shoulder extension

Question 12

Pectoralis Major

Answer 12

Origin: clavicle, sternum, ribs
Insertion: Intertubercular groove/sulcus of humerus
Action: flexion, adduction, internal rotation

Question 13

Latissimus Dorsi

Answer 13

Origin: lower spine, illiac crest
Insertion: Intertubercular groove/sulcus of humerus
Action: extension, adduction, internal rotation

Question 14

Teres Major

Answer 14

Origin: interior angle of scapula
Insertion: lesser tubercule of humerus
Action: extension, adduction, internal rotation

Question 15

Supraspinatus

Answer 15

Origin: supraspinous fossa of scapula
Insertion: greater tubercle
Action: shoulder abduction

Question 16

Infraspinatus

Answer 16

Origin: infraspinous fossa of scapula
Insertion: greater tubercle
Action: shoulder external rotation

Question 17

Teres Minor

Answer 17

Origin: lateral border of scapula
Insertion: greater tubercle
Action: shoulder external rotation

Question 18

Subscapularis

Answer 18

Origin: subscapular fossa of scapula
Insertion: lesser tubercle
Action: internal rotation

Question 19

Long Head of Biceps Brachii

Answer 19

Origin: superior glenoid cavity
Insertion: radial tuberosity
Action: elbow flexion

Question 20

Short Head of Biceps Brachii

Answer 20

Origin: coracoid process
Insertion: radial tuberosity
Action: elbow flexion

Question 21

Long Head of Triceps Brachii

Answer 21

Origin: inferior glenoid cavity
Insertion: olecranon process of ulna
Action: elbow extension

Question 22

Lateral Head of Triceps Brachii

Answer 22

Origin: proximal humerus
Insertion: olecranon process of ulna
Action: elbow extension

Question 23

Medial Head of Triceps Bracii

Answer 23

Origin: shaft of humerus
Insertion: olecranon process of ulna
Action: elbow extension

Question 24

Coracobrachialis

Answer 24

Origin: coracoid
Insertion: shaft of humerus (medially)
Action: shoulder flexion

Question 25

Brachialis

Answer 25

Origin: shaft of humerus (anterior) Insertion: Coronoid process of ulna Action: elbow flexion

Question 26

Brachioradialis

Answer 26

Origin: lateral epicondyle of humerus Insertion: styloid process of radius Action: elbow flexion