Quiz 2.2

Question 1

Why does glenoid fossa point up

Answer 1

Allows for overhead movement but make shoulder prone to separation
Labrum there to add stability

Question 2

What supports the glenohumeral joint

Answer 2

Rotator cuff muscles
Capsular ligaments
Coracohumeral ligament

Question 3

Scapula impact on shoulder movement

Answer 3

Humerus and scapular work/move together to create greater range of motion
Scapula rotates upward so there is no humeral impingement

Question 4

Movements of glenohumeral joint

Answer 4

Flexion
Extension
Int/ext rotation (Int >)
Ab/Ad duction

Question 5

Articulations of elbow

Answer 5

Humeroulnar joint, humeroradial joint, proximal radio-ulnar joint

Question 6

Humeroulnar joint

Answer 6

Hinge joint
Trochlea of humerus and ulna
Flex/extension

Question 7

Humeroradial joint

Answer 7

Limited ball-n-socket, hinge
Capitulum of humerus, radius
Pronation/supination
Flex/ext

Question 8

Proximal radioulnar

Answer 8

Pivot
Radial head of radius and radial notch of ulna
Contributes to ROM of pronation/supination

Question 9

Distal Radioulnar

Answer 9

Pivot
Ulnar notch of radius and head of ulna
Primary pronation/supination

Question 10

Muscles for supination

Answer 10

Biceps brachii, brachioradialis, and supinator

Question 11

Muscles for pronation

Answer 11

Pronator teres and pronator quadratus

Question 12

Interosseous membrane

Answer 12

Connective tissue that connects radius and ulna, allows for pronation and supination

Question 13

Why are there so many ligaments at different orientations at the elbow?

Answer 13

Stress comes from many different angles so ligaments must provide stability in many planes

Question 14

Ulnar collateral ligament (UCL)

Answer 14

Anterior, posterior, and oblique/transverse ligaments
Limits abduction at elbow joint

Question 15

Tommy John Surgery

Answer 15

For tear of the UCL
Common baseball pitcher injury
Uses hamstring tendon as replacement

Question 16

Golfer’s elbow

Answer 16

Medial epicondylitis:
Tendon inflammation causes pain on inside of the elbow

Question 17

Tennis Elbow

Answer 17

Lateral epicondylitis:
Tendon inflammation causes pain on outside of elbow

Question 18

Valgus

Answer 18

Abduction of ulna

Question 19

Varus

Answer 19

ADduction of the ulna

Question 20

Gun stock deformity

Answer 20

Excessive Varus (adduction)

Question 21

Cubitus

Answer 21

word for ulna

Question 22

Significance of carrying angle of elbow

Answer 22

Allows arm to swing without hitting hips, angle provides space to carry objects at side
Women have larger angle due to wider hips

Question 23

Biceps muscle characteristics

Answer 23

NO pennation = less force, greater speed
Lower fatigue

Question 24

Tricep muscle characteristics

Answer 24

More force than biceps due to pennation and 3 heads summing together.
Fatigue faster than bicep
Provide stability in flexion