Exam I Muscle O, I, N, A

Question 1

Pectoralis Major

Answer 1

O: medial 1/2 of clavicle, sternum, upper 6 costal cartilages
I: bicipital groove of humerus cartilage
N: medial and lateral pectoral nerves
A: flex, adduct, medially rotate humerus

Question 2

Pectoralis Minor

Answer 2

O: ribs 3,4,5
I: coracoid process of scapula
N: medial pectoral nerve
A: depress scapula, protraction, medial rotation

Question 3

Subclavius

Answer 3

O: first costal cartilage
I: inferior groove of clavicle
N: n. to subclavius
A: depress and stabilize clavicle

Question 4

Serratus Anterior

Answer 4

O: upper 8 ribs
I: medial border of scapula
N: long thoracic
A: protract, laterally rotate scapula

Question 5

Infraspinatus

Answer 5

O: infraspinatus fossa
I: greater tuberacle of humerus
N: suprascapular nerve
A: laterlly rotate humerus

Question 6

Supraspinatus

Answer 6

O: supraspinatus fossa
I: greater tubercle of humerus
N: suprascapular nerve
A: abduct humerus

Question 7

Teres Minor

Answer 7

O: lateral border of the scapula
I: greater tubercle
N: axillary nerve
A: laterally rotate humerus

Question 8

Subscapularis

Answer 8

O: subscapular fossa
I: lesser tubercle
N: upper and lower subscapular nerve
A: medially rotate humerus

Question 9

Deltoid

Answer 9

O: 
posterior: spine of scapula
intermediate: acromion
anterior: lateral 1/3 of clavicle
I: deltoid tuberosity of humerus
N: axillary nerve
A: abduct, flex, extend, medially and laterally rotate humerus

Question 10

Levator Scapulae

Answer 10

O: TP of C1-C4
I: medial border of scapula ,above spine
N: dorsal scapular nerve
A: elevate, retract, and medially rotate scapula

Question 11

Rhomboid minor

Answer 11

O: SP of C7 and T1
I: medial border of scapula at spine
N: dorsal scapular nerve
A: elevate, retract, medially rotate scapula

Question 12

Rhomboid major

Answer 12

O: SP T2-T5
I: medial border of scapula, below spine
N: dorsal scapular nerve
A: elevate, retract, medially rotate scapula

Question 13

Teres Major

Answer 13

O: lateral border of scapula
I: intertubercular groove
N: lower subscapular nerve
A: adduct, medially rotate, extend humerus

Question 14

Latissimus Dorsi

Answer 14

O: T6-L5, median crest of sacrum, illiac crest
I: intertubercular groove
A: adduct, extend, medially rotate humerus
N: thoracodorsal

Question 15

Trapezius

Answer 15

O: external occipital protuberance, superior nuchal line, nuchal ligament, C7-T12
I: spine of scapula, acromion, lateral 1/3 of clavicle
N: Accessory Nerve
A: elevation, depression, retraction, lateral rotation

Question 16

Pronator Teres

Answer 16

O: CFO
I: radius
N: median nerve
A: pronates forearm

Question 17

Palmaris Longus

Answer 17

O: CFO
I: palmar aponeurosis
N: median nerve

Question 18

Flexor Carpi Radialis

Answer 18

O: CFO
I: MC 2,3
N: median nerve
A: flex, radially deviates wrist

Question 19

Flexor Carpi Ulnaris

Answer 19

O: CFO
I: MC 5
N: ulnar nerve
A: flex and ulnar deviate wrist

pisiform bone develops within tendon (sesamoid bone)

Question 20

Flexor Digitorum superficialis

Answer 20

O: CFO, radius and ulna
I: middle phalanges of 2-5
N: median nerve
A: flex fingers

Question 21

Flexor digitorum profundus

Answer 21

O: radius, ulna
I: distal phalanges
N: median and ulnar nerve

Question 22

Flexor pollicis longus

Answer 22

O: radius, ulna
I: distal phalanx of thumb
N: median nerve

Question 23

Pronator Quadratus

Answer 23

O & I: radius to ulna
N: median nerve
A: pronates forearm

Question 24

Brachioradialis

Answer 24

O: CEO
I: radius
N: radial nerve
A: flex elbow, maintain 1/2 pronated position

Question 25

Extensor carpi radialis longus and brevis

Answer 25

O: CEO I: MC 2,3 N: radial nerve A: extend and radial deviate wrist

Question 26

Extensor digitorum and extensor digiti minimi

Answer 26

O: CEO I: extensor expansions over middle and distal phalanges A: extends fingers N: radial nerve

Question 27

Extensor carpi ulnaris

Answer 27

O: CEO I: MC 5 N: radial nerve A: extend wrist and ulnar deviate

Question 28

Supinator

Answer 28

O: supinator crst of ulna, lateral epicondyle of humerus, radial collateral and annular ligaments I: lateral surface of proximal radius N: radial nerve

Question 29

Abductor pollicis longus

Answer 29

O: posterior surface of middle 1/3 of ulna, radius, and interosseus membrane I: base of MC 1 N: radial nerve

Question 30

Extensor pollicis brevis

Answer 30

O: posterior surface of radius and interosseous membrane I: base of proximal phalanx of thumb N: radial nerve

Question 31

Extensor pollicis longus

Answer 31

O: proximal surface of middl 1/3 of ulna, interosseous membrane I: base of distal phalanx of thumb N: radial nerve

Question 32

Extensor digit indici

Answer 32

O: proximal surface of ulna, interosseous membrane I: extensor expansion of 2nd digit N: radial nerve

Question 33

Corocobrachialis

Answer 33

O: corocoid process I: middle 1/3 of humerus N: musculocutaneous A: flex, adduct arm

Question 34

Triceps Brachii

Answer 34

``` O: lateral head: posterior humerus long head: infraglenoid tubercle medial head: posterior humerus I: olecranon process of ulna N: Radial nerve (passes btwn medial and lateral head A: extend arm and forearm ```

Question 35

Biceps brachii

Answer 35

``` O: long head: supraglenoid tubercle short head: coracoid process I: radial tuberosity, bicipital aponeurosis N: musculocutaneous A: flex and supinate forearm ```

Question 36

Brachialis

Answer 36

O: lower 1/2 of humerus I: coronoid process of ulna N: musculocutaneous and radial nerve A: flex forearm