Upper limb 1

Question 1

Pectoral Girdle (2 bones)

Answer 1

Clavicle + Scapula

Question 2

Function of Pectoral Girdle

Answer 2

Provides attachment for muscles; Provides attachment for the upper limb to the axial skeleton; Provides attachment for the upper limb to the axial skeleton;

Question 3

Clavicle shape

Answer 3

Medial 2/3rds of the clavicle is convex anteriorly Lateral 1/3rd is concave anteriorly

Question 4

Clavicle function

Answer 4

o Important muscle attachment site o Act as braces by holding the scapulae and arms out laterally from the thorax. ▪ This becomes obv when a clavicle is fractured – entire shoulder region collapses medially o Transmit 􀇲compression force􀇳 from the upper limbs to the axial skeleton

Question 5

Scapulae location

Answer 5

rib 2 to rib

Question 6

Scapula 1 Superior boarder 2 Medial border 3 Lateral border

Answer 6

1 short & sharp 2 parallel to the vertebral column 3 thicker, and ends in the 􀇲glenoid fossa

Question 7

Scapula 1 Lateral angle 2 Superior angle 3 Inferior angle

Answer 7

1 contains the glenoid fossa 2 superior and medial borders meet, 3 medial and lateral borders meet

Question 8

Clavicle and scapula attachment point

Answer 8

acromial end + coracoid process

Question 9

3 fossae of the scapula

Answer 9

supraspinous fossa infraspinous fossa Subscapular fossa

Question 10

Muscles on scapula (posterior)

Answer 10

Trapezius Levator scapulae Rhomboids

Question 11

Muscles on scapula (anterior)

Answer 11

Pectoralis minor Serratus anterior Subclavius

Question 12

Levator scapulae origin

Answer 12

cervical vertebrae

Question 13

Levator scapulae insertion

Answer 13

medial border of scapula

Question 14

Levator scapulae action

Answer 14

Elevates scapula and tilts glenoid fossa inferiorly

Question 15

Levator scapulae Innervation

Answer 15

Dorsal scapular (C5) and cervical nerves (C3-C4)

Question 16

Trapezius

Origin

Answer 16

superior nuchal line;

external occipital protuberance

nuchal ligament

spinous
processes of C7-T12

Question 17

Trapezius

Insertion

Answer 17

Lateral 1/3 of clavicle,

acromion, and

spine of scapula

Question 18

Trapezius Action

Answer 18

upper fibers → elevating scapula

middle fibers → retract scapula

lower fibers → depress scapula

Question 19

Trapezius Innervation

Answer 19

spinal root of accessory nerve (CN XI and C3, C4)

Question 20

Rhomboid Origin

Answer 20

Minor: nuchal ligament and spinous processes of C7-T1;

Major: spinous processes of T2-T5

Question 21

Rhomboid Insertion

Answer 21

Medial border of scapula

Question 22

Rhomboid Action

Answer 22

Retracts scapula and rotates it to depress the glenoid cavity

Question 23

Rhomboid Innervation

Answer 23

Dorsal scapular nerve (C4-C5)

Question 24

Pectoralis minor Origin

Answer 24

3rd to 5th ribs

Question 25

Pectoralis minor Insertion

Answer 25

Coracoid process of the scapula

Question 26

Pectoralis minor Action

Answer 26

stabilizes scapula by drawing it inferiorly and anteriorly

Question 27

Pectoralis minor Innervation

Answer 27

medial pectoral nerve, C8-T1

Question 28

Serratus Anterior Origin

Answer 28

fleshy slips from upper 8-9 ribs

Question 29

Serratus Anterior Insertion

Answer 29

costal aspect of medial margin (border) of scapula

Question 30

Serratus Anterior Action

Answer 30

protracts

stabilizes scapula,

assists with upward rotation

Question 31

Serratus Anterior Innervation

Answer 31

long thoracic nerve, C5,C6,C7

Question 32

Rotator Cuff muscles

Answer 32

1) subscapularis,
2) supraspinatus,
3) infraspinatus,
4) teres minor

Question 33

Rotator cuff that acts to abduct the arm

Answer 33

Supraspinatus

Question 34

Rotator cuff that inserts into the Lesser Tubercle

Answer 34

Subscapularis

Question 35

Innervation of Subscapularis

Answer 35

Subscapular nerve

Question 36

Innervation of Supraspinatus

Answer 36

Subscapular nerve

Question 37

Innervation of Infraspinatus

Answer 37

Subscapular nerve

Question 38

Innervation of Teres Minor

Answer 38

Axillary Nerve

Question 39

Humerus head articulates with

Answer 39

Glenoid fossa

Question 40

Articulation structure of Humerus for radius

Answer 40

Capitulum

Question 41

Articulation structure of Humerus to Ulna

Answer 41

Trochlea