Superficial back, shoulder & scapular region

Question 1

Latissimus dorsi

Answer 1

Nerve: Thoracodorsal nerve

Function: Extends, adducts, and medically rotates humerus

Question 2

Trapezius

Answer 2

Accessory nerve (CN XI) and C3 &C4 (spinal nerves

Functions:
Upper fibers–>Elevate scapula :)
Middle fibers–> Retract scapula :I
Lower fibers–> Depress scapula :(

• upper part of trapezius helps serratus anterier in abduction of humerus of more than 90 degrees

Question 3

Droopy Shoulder?

Answer 3

caused by paralysis of trapezius

Question 4

Levator scapulae

Answer 4

Nerve: Dorsal scapular nerve

Function: elevates & fixes scapula

Question 5

Rhomboidei (major & minor)

Answer 5

Nerve: Dorsal scapular nerve

Function: Retracts & elevates scapula

Question 6

Serratus Anterior

Answer 6

Nerve: Long thoracic nerve

Function: Protracts scapula and holds it against thoracic wall

Question 7

Winged scapula

Answer 7

injury to long thoracic nerve==serratus anterior muscle can’t hold scapula against thoracic wall

Question 8

DELTOID

Answer 8

Axillary nerve

Function:
Anterior fibers: flex and medially rotate humerus
Middle fibers: chief ABDUCTOR of humerus
Posterior fibers: extend and laterally rotate humerus

Question 9

Teres major

Answer 9

Lower subscapular nerve

Function: ADDUCTS and medially rotates humerus

Question 10

Supraspinatus

Answer 10

Suprascapular nerve

Function: abducts the humerus

Question 11

Intraspinatus

Answer 11

Suprascapular nerve

Functions: laterally rotates the humerus

Question 12

Teres minor

Answer 12

Axillary nerve

Function: laterally rotates humerus

Question 13

Subscapularis

Answer 13

Upper & lower subscapular nerves

Functions: medially rotates humerus

Question 14

Omohyoid muscle

Answer 14

Cervical nerves 1, 2, & 3

Functions: Depresses, retracts, and steadies the hyoid bone

Inferior attachment: superior border of scapula
Superior attachment: hyoid bone

Question 15

Triangle of auscultation borders?

Answer 15

Superior–>latissimus dorsi
Medial–> scapula
Inferolateral –>trapezius

• over 6th intercostal space
• *good place to hear respiratory sounds

Question 16

Rotator cuff

Answer 16

"SITS"
Supraspinatus
Infraspinatus
Teres minor
Subscapularis