Upper limb origins and insertion

Question 1

Trapezius origin and insertion

Answer 1

origin: superior nuchal line, external occipital protuberance, medial margin of the ligamentum nuchae, spinous process of CVII to TXII and related supraspinaous ligaments

Question 2

Trapezius innervation

Answer 2

Sensor nerve; cranial nerve XI

Question 3

Trapezius function

Answer 3

elevates scapula,
rotates scapula during abduction of humerous above horizontal,
middle fibers retract scapula. lower fibers depress scapula

Question 4

Deltoid origin and insertion

Answer 4

Origin: lateral margin of acromion, spine of scapula; lateral 1/3 of clavical

Insertion: deltoid tuberosity

Question 5

Deltoid innervation

Answer 5

axillary nerve (C5-C6)

Question 6

Deltoid action

Answer 6

ABduction, posterior fibers cause extension and anterior fibers flexion

Question 7

Levator scapulae origin and insertion

Answer 7

origin: Transferse process of C1-C2 and posterior tubercales of transfer process of C3-C4

Insertion: posterior surface of medial border of scapula from superior angle to root of spine of the scapula

Question 8

Levator scapulae innervation

Answer 8

branches directly from anterior rami C3-C4 and branches from C 5 of dorsal scapular nerve

Question 9

Levator scapulae action

Answer 9

elevates scapula

Question 10

Rhomboid minor origin and insertion

Answer 10

Origin: lower end of ligaments nuchael and spinous processes of C7-T1 vertabrae

Insertion: posterior surface of medial border of scapula at the root of the spine of the scapula

Question 11

Rhomboid minor innervation

Answer 11

dorsal scapular nerve (C4-C5)

Question 12

Rhomboid minor action

Answer 12

elevates and retracts the scapula

Question 13

Rhomboid major origin and insertion

Answer 13

origin: spinous process of T2-T5
Insertion: posterior surface of medial border of scapula from the root of the spine of the scapula to the inferior angle

Question 14

Rhomboid major innervation

Answer 14

dorsal scapular nerve (C4-C5)

Question 15

Rhomboid major action

Answer 15

elevates and retracts the scapula

Question 16

Supraspinatus origin and insertion

Answer 16

Origin: medial two thirds of supraspinous fossa

insertion: greater tubercle of humerous

Question 17

supraspinatus innervation

Answer 17

suprascacular nerve (C5-C6)

Question 18

infraspinatus origin and insertion

Answer 18

origin: infraspinus fossa of scapula
insertion: greater tubercle of humorous

Question 19

infraspinatus innervation

Answer 19

suprascpular nerve (c5-c6)

Question 20

teres minor origin and insertion

Answer 20

origin: lateral border of scapula
insertion: grater tuberacle of humerus

Question 21

teres minor innervation

Answer 21

axillary nerve (c5-c6)

Question 22

teres minor action

Answer 22

rotator cuff muscle; lateral rotation of arm at glenohumeral joint

Question 23

teres major origin and insertion

Answer 23

origin: elongate oval area on the posterir surface of the inferior angle of the scapula
insertion: medial lip of the intertubecular groove on anterior surface of the humerus

Question 24

teres major innervation

Answer 24

inferior scapular nerve C5-C7

Question 25

Teres major action

Answer 25

medial rotation and extension of arm at the shoulder joint

Question 26

long head of triceps origin and insertion

Answer 26

origin: infraglenoid tuberacle of scapula insertion: common tendon insertion with medial and lateral heads on the olecranon process of ulna

Question 27

long head of triceps innervation

Answer 27

radial nerve (c6-C8)

Question 28

triceps action

Answer 28

extension of arm at shoulder and elbow

Question 29

name the borders and contents of the quadrangular space

Answer 29

borders: inferior margin of teres minor, surgical neck of humerus, superior margin of the teres major, latearl margin of the long head of tricepts brachii contents: acial nerve and posterior circumflex humeral artery and vein

Question 30

name the borders and contents of the triangular space

Answer 30

border: medial border of triceps, teres major, teres minor contents circumflex scapular artery and vein

Question 31

name the borders and contents of the triangular interval

Answer 31

borders: lateral margin of long head of tricepts, shaft of humerus, inferior margin of the teres major contents: radial artery and profunda brachii artery (deep artery of arm)

Question 32

pectoralis major origin and insertion

Answer 32

origin clavicular head - anterior surface of medial half of claviacal, sternocostal head, anterior surface of sternum, first seven costal cartilages, sternal end of sixth rib, aponeurosis of external oblique insertion: lateral lip of intertubecular grove on anterior surface of humerus

Question 33

pectoralis major innervation

Answer 33

medial and lateral pectoral nerve

Question 34

pectoralis major action

Answer 34

flexion, adduction, medial rotation of arm at shoulder

Question 35

subclavius origin and insertion

Answer 35

origin: first rib at junction between rib and costal cartilage insertion: groove on inferior surface of middle one third of clavicle

Question 36

subclavius nerve

Answer 36

nerve to the subclavius

Question 37

pectoralis minor

Answer 37

origin: anterior surfaces and superior borders of ribs 3-5 insertion: coracoid process

Question 38

pectoralis minor innervation

Answer 38

medial pectoral nerve

Question 39

pectoralis minor action

Answer 39

pulls top of shoulder down and protracts scapula

Question 40

subscapularis origin and insertion

Answer 40

origin: medial two thirds of subscapular fossa | insertion: lesser tuberacle of humerus

Question 41

subscapularis innervation

Answer 41

upper and lower subscapular nerves (c5-7)

Question 42

lattisimus dorsi origin and insertion

Answer 42

origin: spinus processes of lower six thoracic vertebrae, throacolumbar fascia lower ribs 3-4 insertion: floor of the intertubecular groove of the anterior surface of the humerus

Question 43

latissimus dorsi innervation

Answer 43

thoracodorsal nerve (C6-8)

Question 44

lattisimus dorsi action

Answer 44

medial rotation, extension, adduction

Question 45

origin and insertion of biceps brachii

Answer 45

origin: long head is subraglenoid tuberacle of scapula, short head is coracoid process insertion: tuberosity of radius

Question 46

biceps brachii innervation

Answer 46

musculocutaneous nerve (c5-c6)

Question 47

coracobrachialis origin and insertion

Answer 47

origin: coracoid process insertion: linear roughening of midshaft of humerus medial side

Question 48

coracobrachialis innervation

Answer 48

musculocutaneous (c5-c6)

Question 49

coracobrachialis action

Answer 49

adduction, flexor of arm at shoulder

Question 50

brachialis origin and insertion

Answer 50

origin: anterior aspect of humerus insertion: tuberosity of ulna

Question 51

brachialis innervation

Answer 51

muculocutanous c5=c6

Question 52

brachialis action

Answer 52

major flexor