Shoulder Mechanics and Counterstrain - Kash

Question 1

Articulations of the Shoulder

Answer 1

Scapulothoracic

Glenohumeral

Acromioclavicular

Sternoclavicular

Question 2

Major Motions of Shoulder

Answer 2

Flexion

Extension

Abduction

Adduction

External rotation

Internal rotation

Question 3

Scapulothoracic Articulation

Question 4

Shoulder Abduction

Answer 4

First 30º of shoulder abduction at glenohumeral joint

After first 30º, there is a ratio of 2º:1º of motion at glenohumeral and scapulothoracic articulations, respectively.

Question 5

Motions of Sternoclavicular Joint

Answer 5

Capable of anteroposterior, superoinferior, and rotational motion

Question 6

Posterior Dislocation of Sternoclavicular Joint

Answer 6

Impingement on critical neurovascular structures may occur

Ex: carotid artery, vagus nerve

Question 7

Motions of Acromioclavicular Joint

Answer 7

Anteroposterior, superoinferior, and rotational motion

Question 8

Shoulder Separation

Answer 8

Refers to disruption of acromioclavicular joint

Question 9

Course of Brachial Plexus

Answer 9

Runs between anterior and middle scalene mm, between first rib and clavicle, and underneath pectoralis minor m.

Question 10

Flexors of Glenohumeral Joint

Answer 10

Pectoralis major

Deltoid, anterior part

Coracobrachialis

Question 11

Innervation of Pectoralis Major

Answer 11

C5-T1 (lateral and medial pectoral nn)

Question 12

Innervation of Deltoid

Answer 12

C5-6 (axillary n)

Question 13

Innervation of Coracobrachialis

Answer 13

C5-7 (musculocutaneous n)

Question 14

Extensors of Glenohumeral Joint

Answer 14

Latissumus dorsi

Teres major

Deltoid, posterior part

Triceps brachii, long head

Question 15

Innervation of Latissimus Dorsi

Answer 15

C6-8 (thoracodorsal n)

Question 16

Innervation of Teres Major

Answer 16

C5-6 (lower subscapular n)

Question 17

Innervation of Triceps Brachii

Answer 17

C6-8 (radial n)

Question 18

Abductors of Glenohumeral Joint

Answer 18

Deltoid, all parts together

Supraspinatus

Question 19

Innervation of Supraspinatus

Answer 19

C4-6 (suprascapular n)

Question 20

Adductors of Glenohumeral Joint

Answer 20

Pectoralis major

Latissimus dorsi

Teres major

Triceps brachii, long head

Question 21

External Rotators of Glenohumeral Joint

Answer 21

Infraspinatus

Teres minor

Deltoid, posterior part

Question 22

Innervation of Infraspinatus

Answer 22

C5-6 (suprascapular n)

Question 23

Innervation of Teres Minor

Answer 23

C5-6 (axillary n)

Question 24

Internal Rotators of Glenohumeral Joint

Answer 24

Subscapularis

Pectoralis major

Latissimus dorsi

Deltoid, anterior part

Teres major

Question 25

Innervation of Subscapularis

Answer 25

C5-7 (upper and lower subscapular nn)

Question 26

Rotator Cuff Muscles

Answer 26

Supraspinatus

Infraspinatus

Teres minor

Subscapularis

Question 27

Arterial Supply to Shoulder

Answer 27

Derived from subclavian aa, which pass over top of first rib between anterior and middle scalene mm

Question 28

Venous Drainage of Shoulder

Answer 28

Occurs via subclavian and brachiocephalic vv, which pass anterior to scalene mm

Question 29

Lymphatic Drainage of Upper Extremity

Answer 29

Ultimately occurs through thoracic inlet

Question 30

Sympathetic Innervation of Upper Extremity

Answer 30

Cell bodies of preganglionic sympathetic neurons located by segments T2-6

Question 31

Tensegrity

Answer 31

Affects everything

Question 32

What are possible causes of a shoulder problem that is slow to respond or unresponsive to treatment, whithout specific mechanism of injury?

Answer 32

Diabetes

Hypothyroidism

Other systemic problems