Appendicular Skeleton - Upper Extremity

Question 0

clavicle - sternoclavicular joint

Answer 0

• convex forward on medial 2/3, concave laterally

- connects arm limb to axial skeleton

Question 1

Pectoral girdle

Answer 1

attach upper limbs to axial skeleton + provide attachments for trunk/neck muscles

1) anterior clavicle
2) posterior scapula

Question 2

clavicle - sternal end

Answer 2

medial, round/triangular. attaches to sternal manubrium, forms jugular notch.

Question 3

clavicle - acromial end

Answer 3

lateral. flattened. Articulates with scapula to form part of shoulder joint - aromioclavicular joint

Question 4

conoid tubercle

Answer 4

clavicle, posteroinferior surface. projection, anchors ligament.

• landmark for L/R

Question 5

scapulae

Answer 5

no direct attachment to axial skeleton–held loosely in place by trunk muscles

Question 6

acromion

Answer 6

scapula. enlarged, roughened end of scapular spine. connects with clavicle (bulbous)

Question 7

coracoid process

Answer 7

scapula. “beaklike,” points anteriorly over tip of shoulder joint and serves as attachment point for some upper limb muscles

Question 8

suprascapular notch

Answer 8

scapula. base of coracoid process, allows nerves to pass through

Question 9

scapular angles

Answer 9

1) superior
2) inferior - landmark for auscultating lung sounds
3) lateral - glenoid cavity

Question 10

glenoid cavity

Answer 10

scapula. shallow socket that receives head of the humerus. biceps connects to the superior rim

Question 11

scapular fossae

Answer 11

1) anterior subscapular fossa
2) posterior supraspinous fossa
3) posterior infraspinous fossa

Question 12

shoulder joint light and mobile

Answer 12

1) sternoclavicular joints = only points of attachment
2) looseness - sliding with muscular movement
3) glenoid cavity - shallow, little stability

Question 13

arm

Answer 13

brachium, humerus, brachial region

head
tubercles
deltoid tuberosity

Question 14

humerus - head

Answer 14

articulates with glenoid cavity. separated from shaft by 1) anatomical neck and 2) surgical neck (common fracture site)

Question 15

humerus - tubercles - greater and lesser

Answer 15

prominences opposite the head

1) greater - lateral
2) lesser - medial

separated by intertubular sulcus (aka bicipital groove)

Question 16

intertubular sulcus/bicipital groove

Answer 16

humerus. guides tendon of biceps muscle to point of attachment on superior rim of glenoid cavity

Question 17

deltoid tuberosity

Answer 17

humerus. midpoint of humeral shaft, where deltoid (fleshy shoulder muscle) attaches

Question 18

humeral condyles

Answer 18

distal end.

• trochlea (medial)
• capitulum (lateral)

both flanked by medial and lateral epicondyles (funny bone)

Question 19

trochlea

Answer 19

humerus, distal end, medial, condyle. articulates with ulna. spool-shaped

Question 20

capitulum

Answer 20

humerus. distal end, lateral, condyle. articulates with radius

Question 21

humerus - epicondyles

Answer 21

1) medial

2) lateral

Question 22

fossae above trochlea

Answer 22

humerus.

1) coronoid fossa - anterior, ulnar, receives ulna when arm flexed
2) olecranon (antecubital) fossa - posterior, ulnar, receives ulna when arm extended
3) radial fossa - anterior lateral, radial, receives radius

Question 23

forearm

Answer 23

antebrachial region

• radius - head, radial tuberosity, ulnar notch, radial styloid process, radioulnar joint
• ulna - coronoid process, olecranon, ulnar styloid process, head, radioulnar joint