bones of the upper limbs and muscles of the arm

Question 1

between the rounded head of the
humerus and the shallow, pear-
shaped glenoid cavity of the
scapula

Answer 1

shoulder joint

Question 2

covered by hyaline articular
cartilage

synovial ball-and-socket joint

Answer 2

shoulder joint

Question 3

Capsule of the SHOULDER JOINT

• attached medially to the margin of
the _____
• attached laterally to the _____
• ___ and ___
• strengthened by the ______

Answer 3

• glenoid cavity
• anatomic neck of the humerus
• thin, lax
• rotator cuff muscles

Question 4

Ligaments of the SHOULDER JOINT

Answer 4

• Glenohumeral Ligaments (3)
• Transverse Humeral Ligament
• Coracohumeral Ligament
• Coracoacromial Ligament

Question 5

Movements of the SHOULDER JOINT:

Flexion:
about 90°
performed by the

Answer 5

anterior fibers of the deltoid, pectoralis major, biceps, and coracobrachialis muscles

Question 6

Movements of the SHOULDER JOINT:

Extension:
about 45°
performed by the

Answer 6

posterior fibers of the deltoid, latissimus dorsi, and teres major muscles

Question 7

Movements of the SHOULDER JOINT:

Abduction:
performed by the

Answer 7

middle fibers of the deltoid, assisted by the supraspinatus

Question 8

Movements of the SHOULDER JOINT:

Adduction:
can swing 45° across the front of the chest
performed by the

Answer 8

pectoralis major, latissimus dorsi,
teres major, and teres minor muscles

Question 9

Movements of the SHOULDER JOINT:

Lateral rotation:
40° to 45°
performed by the

Answer 9

infraspinatus, teres minor, and
posterior fibers of the deltoid muscle

Question 10

Movements of the SHOULDER JOINT:

Medial rotation:
about 55°
performed by

Answer 10

subscapularis, latissimus dorsi, teres major, and anterior fibers of the deltoid muscle

Question 11

Movements of the SHOULDER JOINT:

Circumduction:

Answer 11

combination of the above movements

Question 12

articulates with the scapula at
the SHOULDER JOINT and with
the radius and ulna at the
ELBOW JOINT

Answer 12

humerus

Question 13

lateral bone of the forearm
- proximal:
humerus at elbow joint
ulna at proximal radioulnar joint
- distal:
ulna at the distal radioulnar joint
scaphoid and lunate bones of the
hand at the wrist joint

Answer 13

radius

Question 14

• medial bone of the forearm
• proximal:
  humerus at the elbow joint
  radius at the proximal radioulnar joint
• distal:
  radius at the distal radioulnar joint
  but it is excluded from the wrist joint
  by the articular disc

Answer 14

ulna

Question 15

Strong membrane that unites
the shafts of the radius and
the ulna

Answer 15

INTEROSSEOUS MEMBRANE

Question 16

Fibers run obliquely downward
and medially; taut when
forearm is in midprone
position (function)

Provides attachment for
neighboring muscles

Answer 16

INTEROSSEOUS MEMBRANE

Question 17

Enclosed in a sheath of deep fascia

Answer 17

upper arm

Question 18

2 fascial septa:
- on the medial side
- on the lateral side

Answer 18

• Medial Supracondylar Ridge of the Humerus
• Lateral Supracondylar Ridge of the Humerus

Question 19

2 fascial compartments:

Answer 19

• Anterior fascial compartment
• Posterior fascial compartment

Question 20

Anterior Fascial Compartment of the Upper Arm:

Muscles

Answer 20

Biceps brachii, coracobrachialis, & brachialis

Question 21

Anterior Fascial Compartment of the Upper Arm:

BLOOD SUPPLY

Answer 21

Brachial artery

Question 22

Anterior Fascial Compartment of the Upper Arm:

NERVE SUPPLY

Answer 22

Musculocutaneous nerve

Question 23

Long head
origin:
insertion:

Answer 23

Supraglenoid tubercle of scapula

Tuberosity of radius and bicipital aponeurosis into deep fascia of forearm

Question 24

short head
origin:

Answer 24

Coracoid process of scapula

Question 25

coracobrachialis origin: insertion:

Answer 25

Coracoid process of scapula Medial aspect of shaft of humerus

Question 26

brachialis origin: insertion:

Answer 26

Front of lower half of humerus Coronoid process of ulna

Question 27

begins at the lower border of the teres major muscle as a continuation of the axillary artery

Answer 27

brachial artery

Question 28

provides the main arterial supply to the arm terminates opposite the neck of the radius by dividing into the radial and ulnar arteries.

Answer 28

brachial artery

Question 29

from the lateral cord of the brachial plexus (C5, 6, and 7) in the axilla → coracobrachialis muscle → biceps and brachialis muscles → lateral aspect of the forearm (lateral cutaneous nerve of the forearm)

Answer 29

MUSCULOCUTANEOUS NERVE

Question 30

has branches to the muscles, skin of front and lateral aspects of forearm, and elbow joint

Answer 30

MUSCULOCUTANEOUS NERVE

Question 31

Posterior Fascial Compartment of the Upper Arm: MUSCLES

Answer 31

Triceps muscle

Question 32

Posterior Fascial Compartment of the Upper Arm: BLOOD SUPPLY

Answer 32

Profunda brachii and ulnar collateral arteries

Question 33

Posterior Fascial Compartment of the Upper Arm: NERVE SUPPLY

Answer 33

Radial nerve

Question 34

triceps long head origin:

Answer 34

infraglenoid tubercle of scapula

Question 35

triceps lateral head origin: insertion:

Answer 35

Upper half of posterior surface of shaft of humerus Olecranon process of ulna

Question 36

triceps medial head origin:

Answer 36

Lower half of posterior surface of shaft of humerus

Question 37

a triangular depression that lies in front of the elbow

Answer 37

CUBITAL FOSSA

Question 38

Boundaries of the Cubital Fossa: • Laterally: • Medially: • Base: • Floor: • Roof:

Answer 38

•Brachioradialis muscle •Pronator teres muscle •2 epicondyles of the humerus •Supinator muscle laterally and the Brachialis muscle medially •Skin and fascia reinforced by the bicipital aponeurosis