Ch.4 Shoulder Girdle

Question 1

What bone relationship does the shoulder girdle associate with?

Answer 1

Scapula & Clavicle

Question 2

T/F When the scapula moves, the clavicle moves with it

Answer 2

True

Question 3

Bony Landmarks (CSMCpApGcLmbIsaSs) (make sure to be able to label them)

Answer 3

• Clavicle
• Scapula
• Manubrium
• Coracoid process
• Acromion process
• Glenoid cavity
• Lateral/medial border
• Inferior/superior angle
• Spine of the scapula

Question 4

What is the SC Joint and it’s characteristics?

Answer 4

-Sternoclavicular joint
-Multiaxial, Anthrodial
-Gives ligamentous support

Question 5

SC Joint: In relation to manubrium, the clavicle:(3)

Answer 5

• Protracts and retracts
• Elevates and depresses
• Has slight gliding movements

Question 6

Characteristics of the Acromioclavicular(3) Joint

Answer 6

Arthrodial
• 20º-30º of gliding & rotational
motion accompany shoulder
girdle & shoulder joint motions
• Often injured
-Provides stability
• Ligamentous support

Question 7

T/F Scapulothoracic Joint is a true synovial joint

Answer 7

False
- Does not have regular synovil features

Question 8

Characteristics of the Scapulothoracic Joint

Answer 8

• Movement depends on SC & AC
joints which allows the scapula to move
• Supported dynamically by its muscles
• No ligamentous support

Question 9

T/F Most movements have common pivot at the SC Joint

Answer 9

False, All

Question 10

What works together in carrying out upper extremity activities?

Answer 10

Shoulder joint & girdle

Question 11

Shoulder girdle movements

Answer 11

• Abduction/adduction
• Upward/downward rotation
• Elevation/depression

Question 12

T/F for some movements, scapula must rotate on axis

Answer 12

True

Question 13

During abduction, what rotation happens and what tilt?

Answer 13

Internal rotation
Lateral tilt

Question 14

During extreme addiction, what rotation happens and what tilt

Answer 14

External rotation
Medial tilt

Question 15

What does good posture enhance?

Answer 15

Respiration

Question 16

Forward shoulder due to scapula protractors & depressors becoming stronger & tighter and
retractors becoming weaker

Answer 16

Kyphosis

Question 17

Serratus anterior weakness or paralysis is typically due to injury of the long thoracic nerve which may come from a variety of causes

Answer 17

Scapula winging

Question 18

T/F Scapula winging is very common amongst individuals

Answer 18

False, relatively rare

Question 19

What 2 plexus are innervate the shoulder girdle muscles?

Answer 19

-Cervical plexus
-Brachial plexus

Question 20

5 characteristics of the shoulder girdle muscles

Answer 20

• Stabilize scapula to move the humerus
• Maintain scapula during shoulder joint actions
• Helps to enhance movement of upper extremity
• Synergy with glenohumeral joint for upper extremity movements

Question 21

What are the 5 main shoulder girdle muscles?

Answer 21

• Trapezius: Upper, middle & lower fibers
• Rhomboids
• Levator scapulae
• Serratus anterior
• Pectoralis minor
• Subclavius: not a primary mover

Question 22

Of the 5 main muscles in the shoulder girdle, which are posterior and lateral?

Answer 22

Serratus anterior

Question 23

Of the 5 main muscles in the shoulder girdle, which are anterior?

Answer 23

Pectoralis minor
Subclavius

Question 24

Of the 5 main muscles in the shoulder girdle,which are posterior?

Answer 24

Trapezius
Rhomboid
Lavatory scapulae

Question 25

General location of trapezius muscle (Origin and Insertion)

Answer 25

• O: base of skull, occipital protuberance, C7, T1-T12 • I: clavicle, acromion process, scapula

Question 26

Movements of Trapezius muscle

Answer 26

• Upper: scapula elevation, extension & ipsilateral rotation of head • Middle: elevation, upward rotation & retraction of scapula -Very active in shoulder function • Lower: depression, retraction & upward rotation of scapula

Question 27

O & I of Levator scapulae muscle

Answer 27

• O: C1-C4 • I: scapula

Question 28

Levator Scapulae movements

Answer 28

• Elevates the medial portion of the scapula • Weak downward rotation • Weak adduction

Question 29

O&I of Rhomboid muscles

Answer 29

• O: C7, T1, T2-T5 • I: Scapula

Question 30

T/F Rhomboid major & minor muscles work together

Answer 30

True

Question 31

Movements of rhomboid muscles

Answer 31

• Adduction (retraction): scapula toward spinal column • Downward rotation from upward rotated state • Elevation: slight upward movement accompanying adduction

Question 32

O & I of Serratus Anterior muscles

Answer 32

• O: Ribs at the chest • I: Medial scapula

Question 33

Movements of Serratus Anterior Muscle

Answer 33

• Movements: • Abduction (protraction): draws medial border of scapula away from vertebrae • Slight upward rotation

Question 34

O&I of Pectoralis minor muscle

Answer 34

O:Ribs I:Scapula

Question 35

Movements of Pectoralis minor muscle

Answer 35

• Abduction (protraction): draws scapula forward & tends to tilt lower border away from ribs • Downward rotation

Question 36

O&I of subclavius muscle

Answer 36

O:Ribs I:Clavicle

Question 37

Movement of subclavius muscle

Answer 37

Depression & Abduction

Question 38

Scapula abduction agonists

Answer 38

• Pectoralis minor • Serratus anterior

Question 39

Scapula adduction agonists

Answer 39

• Trapezius • Rhomboids

Question 40

Scapula upward rotation

Answer 40

• Trapezius • Serratus anterior

Question 41

Scapula downward rotation

Answer 41

• Pectoralis minor • Rhomboid

Question 42

Scapula elevation

Answer 42

• Levator scapula • Trapezius • Rhomboid

Question 43

Scapula depression

Answer 43

• Trapezius • Pectoralis minor