Lab - Shoulder Anatomy

Question 1

Clavicle Actions?

Answer 1

Articulates w/ sternum (medially) and acromion (lateral)

Question 2

Humorous parts?

Answer 2

Greater and lesser tubercle

Question 2

Scapula Landmarks/ bone formations?

Answer 2

Coracoid process, glenoid cavity, scapular spine, acromion

Question 3

Sternum sections?

Answer 3

Manubrium, body, xiphoid process

Question 4

What type of joint is the Glenohumeral Joint? Describe its movement and stability.

Answer 4

Ball and socket joint
Deepened by glenoid labrum
High mobility, low stability

Question 5

Sternoclavicular Joint type?

Answer 5

Saddle joint

Question 6

Acromialclavicular joint type?

Answer 6

Plane joint
Separated shoulder injury

Question 7

Scapulothoracic joint?

Answer 7

Articulation of scapula on the thoracic wall/ rib cage`

Question 8

Ligaments of Shoulder?

Answer 8

anterior, middle, inferior, posterior glenohumeral ligs.

Coracohumeral lig. (strength superiorly)

Transverse humeral lig. (keeps LHB in bicipital groove)

Question 9

Stabilizer Mscs in the shoulder?

Answer 9

Long head of Biceps (superior support)
Long head of triceps (inferior support)
Rotator cuff mscs

Question 10

Posterior capsule of shoulder?

Answer 10

Provides stability and

Question 11

Rotator Cuff mscs and job?

Answer 11

Active shoulder stabilizers
Also have individual actions

External Rotation

Question 12

Sternoclavicular Joint ligs?

Answer 12

Interclavicular Lig.

Anterior/ posterior sternoclavicular ligs.

Costoclavicular Lig. (attaches each clavicle to first ribs)

Question 13

AC Joint ligs.?

Answer 13

Superior, inferior, anterior, posterior AC ligs.

Coracoclavicular lig. (conoid and trapezoid, 2 parts)

Coracoacromial lig. (creates coracoacromial arch)

Question 14

Major stabilizer mscs of the shoulder girdle?

Answer 14

Trapezius (upper, middle, lower)
Lats
Rhomboid major (T2-T6)
Rhomboid minor (T7-C1)R
Levator scapula

Question 15

Rotator Cuff mscs (SITS)?

Answer 15

Superspinatus
Infraspinatus
Teres Minor
Subscapularis

stabilize humorous in glenoid w/ all mvms

Question 16

Supraspinatus?

Answer 16

stabilize humorous in glenoid w/ all mvms

Abduction through first 15 degrees

Question 17

Infraspinatus

Answer 17

stabilize humorous in glenoid w/ all mvms

ER

Question 18

Teres Minor

Answer 18

stabilize humorous in glenoid w/ all mvms

ER

Question 19

Subscapularis?

Answer 19

IR

Question 20

Lats?

Answer 20

ER, Adduction

Question 21

Pec Major

Answer 21

Flex, IR, Add

Question 22

Deltoid

Answer 22

Anterior = Abduction, flex, IR
Middle = Abduction
Rear = Abduction, ext, ER

Question 23

Teres Major

Answer 23

Ext, Add, IR

Question 24

Coracobrachialis?

Answer 24

Flex, Add

Question 25

Biceps BRachii?

Answer 25

Flex and supinate elbow

Question 26

TRiceps Brachii?

Answer 26

ext of elbow

Question 27

Rhomboids

Answer 27

Scapular adduction and downward rotation of scapula

Question 28

Levator Scapulae?

Answer 28

Scapular elevation and side flexion of the neck if scar is fixed

Question 29

Trapezius action?

Answer 29

Upper = scap elevation Middle = Scap adduction (retraction) Lower = Scap depression and rotation

Question 30

Serratus Anterior?

Answer 30

Stabilize scap against thoracic wall and causes upward rotation and abduction during Scapulohumeral rhythm Scapular Winging

Question 31

Shoulder Bursae

Answer 31

Subacromial/ subdeltoid - often gets compressed under coracoacromial arch

Question 32

Shoulder Nerves?

Answer 32

Brachial Plexus C5-T1 Dont memorize whole brachial plexus focus on bottom three nerves C5,6,7,8, T1 nerve roots form the plexus At armpit --> becomes 5 n. Musculocutaneous n. Axillary n. Radial n. Median n. Ulnar n.

Question 33

Shoulder/ upper arm Arteries?

Answer 33

Subclavian a. - Axiallry a. once in armpit - Then becomes Brachial a. - Then Radial/ ulnar a.