Shoulder FINAL

Question 1

5 articulations of the shoulder

Answer 1

1. glenohumeral [ball and socket]
2. sternoclavicular
3. acromioclavicular (AC)
4. coracoclavicular (CC)
5. Scapulothoracic

Question 2

most freely moving joint in the body, with poor joint stability

Answer 2

glenohumeral

Question 3

what body part makes up the ball and socket of the glenohumeral joint

Answer 3

ball: head of humerus
socket: glenoid fossa of the scapula

Question 4

what is unique about the sternoclavicular joint

Answer 4

only bone to bone articulation the shoulder has with the thoracic region/axial skeleton

Question 5

what type points create the acromioclavicular joint

Answer 5

acromion process of the scapula and the clavicle

Question 6

what is ligament injury at the acromioclavicular joint called?

Answer 6

AC separation or separated shoulder joint

Question 7

what two parts comprise the coracoclavicular joint

Answer 7

coracoid process of the scapula, clavicle

Question 8

the CC joint is a stable joint bound by what ligament?

Answer 8

coracoclavicular ligament

Question 9

region between the scapula and thoracic wall

Answer 9

scapulathoracic joint

Question 10

the scapula thoracic joint has ____ muscular attachments

Answer 10

17

Question 11

Flexion of the shoulder in degrees? Extension?

Answer 11

0-180 deg

0-50 deg

Question 12

3 PM’s shoulder flexion

Answer 12

coracobrachialis
anterior deltoid
Pec major

Question 13

2 PM’s shoulder extension

Answer 13

Posterior Deltoid

Latissimus Dorsi

Question 14

Abduction & Adduction of shoulder in degrees

Answer 14

ab - 0-180

ad - 180-0

Question 15

2 PM’s of shoulder abduction

Answer 15

middle deltoid

supraspinatus

Question 16

2 PM’s shoulder adduction

Answer 16

Latissimus dorsi

Teres major

Question 17

Internal & external shoulder rotation in degrees

Answer 17

internal (medial): 0-90 deg

external (lateral): 0-90 deg

Question 18

2 PM’s internal rotation

Answer 18

subscapularis

pectoralis major

Question 19

2 PM’s external rotation

Answer 19

infraspinatus

teres minor

Question 20

Rotator cuff muscles

Answer 20

supraspinatus
infraspinatus
teres minor
subscapularis

Question 21

what does the rotator cuff do ?

Answer 21

forms a cuff around head of humerus, responsible for where the head of humerus goes in arm movement

Question 22

movements of the scapula

Answer 22

1. protraction (abduction)
2. retraction (adduction)
3. elevation
4. depression

Question 23

scapula protraction PM

Answer 23

serratus anterior

Question 24

3 PM’s scapula retraction

Answer 24

middle trapezius

rhomboid minor & major

Question 25

2 PM's scapula elevation

Answer 25

upper trapezius | levator scapulae

Question 26

PM scapula depression

Answer 26

lower trapezius

Question 27

what is scapulohumeral rhythm?

Answer 27

regular pattern of scapular rotation that accompanies & facilitates humeral abduction

Question 28

what does scapulohumeral rhythm do for the shoulder?

Answer 28

enables greater ROM than if scapula was fixed

Question 29

as the humerus elevates to ___ degrees, there is no movement of the ______

Answer 29

30 degrees, scapula

Question 30

When the humerus elevates tom 30 degrees the scapula does not move. What is this referred to as?

Answer 30

setting phase; stable base is created on the thoracic wall

Question 31

from ___ to ___ degrees the scapula abducts & upwardly rotates __ deg. for every __ deg. of humeral elevation

Answer 31

- 30 to 90 degrees | - 1 deg. for every 2 deg.

Question 32

from ___ deg. to full ________ [____ deg] of the humerus, the scapula abducts and upwardly rotates ___ deg. for each ___ deg. of humeral elevation

Answer 32

- 90 deg - abduction - 180 - 1 for each 1

Question 33

4 stages of pitching

Answer 33

1. windup 2. cocking 3. acceleration 4. follow-through

Question 34

scapula elbow & humerus position during the early cocking stage

Answer 34

- scapula retracted - elbow flexed - humerus abducted & externally rotated

Question 35

the acceleration is ________ and brief

Answer 35

explosive

Question 36

scapula humerus and elbow movement in acceleration phase

Answer 36

- scapula continues to protract - humerus continues to horizontally adduct while internally rotating - elbow extends

Question 37

scapula & humerus position in the early follow-through

Answer 37

- adduction of the humerus across the front of the body | - max internal rotation of the humerus, small recoil in external rotation

Question 38

what movement occurs in the late follow through stage

Answer 38

completion of trunk rotation & scapular protraction