Anatomy: Superficial Back, Shoulder, Scapula

Question 1

Latissimus Dorsi

Answer 1

Thoracodorsal Nerve Spinous processes below T6/iliac crest/ribs intertubercular groove of humerus Extend, adduct, medially rotate

Question 2

Trapezius

Answer 2

Accessory Nerve (CN XI) Nuchal line/occipital bone/C7-T12 Clavicle, acromion, spine of scapula Elevate, retract, depress scapula Droopy shoulder w/ accessory nerve injury

Question 3

Levator Scapulae

Answer 3

Dorsal Scapular Nerve C1-C4

medial border of scapula,

superior to rhomboids

Elevate and fix scapula

Question 4

Rhomboid muscles

Answer 4

Dorsal Scapular Nerve C7-T5 medial border of scapula Retracts and elevates scapula

Question 5

Serratus anterior

Answer 5

Long Thoracic nerve Lateral border of ribs 1-8 medial border scapula Protracts scapula and holds against thoracic wall Injury to Long thoracic nerve –> winged scapula

Question 6

Winged scapula

Answer 6

Injury to long thoracic nerve –> paralysis of serratus anterior –> cannot protract scapula/hold against thoracic wall

Question 7

Deltoid

Answer 7

Axillary Nerve Lateral third clavicle, acromion, spine of scapula deltoid tuberosity of humerus flex/extend, med/lat rotate and chief abductor of humerus Axillary nerve injury proximally –> lose roundness of shoulder

Question 8

Chief abductor of arm

Answer 8

Deltoid

Question 9

Teres Major

Answer 9

Lower Subscapular nerve Inferior angle of scapula medial lip of intertubercular groove of humerus Adduct and medially rotate humerus

Question 10

Supraspinatus

Answer 10

Suprascapular nerve Supraspinous foss of scapula greater tubercle of humerus Adbducts humerus Most commonly torn RC muscle/tendon

Question 11

Infraspinatus

Answer 11

Infraspinatus Suprascapular nerve Infraspinous fossa of scapula Greater tubercle of humerus Laterally rotates humerus

Question 12

Supra/infraspinatus and teres minor muscles both attach to

Answer 12

greater tubercle of humerus

Question 13

Teres minor

Answer 13

Axillary Nerve Lateral border of scapula Inferior greater tubercle of humerus Laterally rotates humerus

Question 14

Subscapularis

Answer 14

Upper and lower subscapular nerves Subscapular fossa of scapula Lesser tubercle of humerus Medially rotates humerus

Question 15

Suprascapular notch

Answer 15

transverse scapular ligament bridges notch

suprascapular artery above, nerve under

Question 16

Rotator Cuff

Answer 16

supraspinatus

infraspinatus

teres minor

subscapularis

Question 17

triangle of ascultation

Answer 17

trapezius, medial border of scapula, latissimus dorsi (over rhomboid major - best place to listen to lungs)

Question 18

What nerve involved in droopy shoulder?

Answer 18

Accessory nerve (CN XI) - trapezius

Question 19

Injury to Thoracodorsal nerve

Answer 19

**Latissimus Dorsi**

mastectomies, inferior axilla surgery

unable to lift trunk w/ UE (i.e. rockclimbing, crutches)

Question 20

Cannot do lift-ups? Nerve to

Answer 20

Latissimus dorsi - Thoracodorsal nerve

Question 21

Most common form of glenohumeral dislocation

Answer 21

inferior, but described as anterior (may damage axillary nerve)

Question 22

Axillary nerve injury (proximal)

Answer 22

humeral neck fractures, pressure in armpit (crutches)

deltoid atrophy

Question 23

Painful arc syndrome

Answer 23

calcify supraspinatus tendon & subacromial bursitis

pain on abduction

Question 24

What pass through quadrangular space?

Answer 24

Axillary nerve and posterior circumflex humeral artery (from axillary artery)

Question 25

What forms quandrangular space?

Answer 25

Teres minor, teres major, humerus, long head triceps