Scapular Pectoral Region

Question 1

Shoulder pad muscle?

Answer 1

Deltoid m.

Question 2

Lats little helper muscle?

Answer 2

Teres major m.

Question 3

Rotator cuff muscles?

Answer 3

Supraspinatus m.
Infraspinatus m.
Teres minor m.
Subscapularis m.

(SITS)

Question 4

Deltoid m.
A:

N:

Answer 4

Abducts humerus, flexes, extends and rotates humerus

Axillary nerve and Posterior Circumflex Humeral vessels

Question 5

Teres Major m.
A:

N:

Answer 5

Medially rotates and extends humerus

Lower (inferior) subscapular nerve and vessels

Question 6

Supraspinatus m.
A:

N:

Answer 6

Abducts humerus (first 15 degrees)

Suprascapular nerve and vessels and dorsal scapular vessels

Question 7

Infraspinatus m.
A:

N:

Answer 7

Laterally rotates humerus

Suprascapular nerve and vessels and subscapular vessels

Question 8

Teres Minor m.
A:

N:

Answer 8

Lateral rotation of humerus

Axillary nerve and suprascapular/subscapular vessels

Question 9

Subscapularis m.
A:

N:

Answer 9

Medial rotation of humerus

Upper and lower subscapular nerves and vessels

Question 10

The ______ bursa can become continuous with the joint capsule due to attrition of the _______.

Answer 10

Subacromial (Subdeltoid) Bursa

Supraspinatus tendon

Question 11

Quadrangular space Boundaries:

Contents:

Answer 11

Superior- Teres Minor m.

Inferior- Teres Major m.

Medial- Long head of triceps brachii m.

Lateral- Surgical neck of humerus

Contains- Axillary n and posterior circumflex humeral vessels

Question 12

Triangular space
Boundaries:

Contents:

Answer 12

Superior- Teres minor m.
Inferior- Teres major m.
Lateral- Long head of triceps brachii m.

Contains- Circumflex scapular vessels

Question 13

Triangular Interval
Boundaries:

Contents:

Answer 13

Superior- Teres major m.
Medial- Long head of triceps brachii m.
Lateral- Lateral head of triceps brachii m.

Contains- Radial n and Deep Brachial a

Question 14

The Suprascapular nerve runs ___ the superior transverse scapular ligament while the Suprascapular artery runs ____ it.

Answer 14

Under (Navy->Under)

Over (Army->Over)

Question 15

What supplies the supraspinatus and infraspinatus mm.?

Answer 15

Suprascapular N. and A.

Question 16

What supplies the levator scapulae and rhomboid mm.?

Answer 16

Dorsal Scapular N. and Deep Transverse Cervical A.

Question 17

What supplies the trapezius m.?

Answer 17

Accessory N. (CN XI) and Transverse Cervical A.

Question 18

What supplies the subscapularis m.?

The teres major m.?

Answer 18

Upper and lower subscapular nerves and subscapular artery

Lower subscap. n, subscap. a

Question 19

In the event of insufficient blood flow thru axillary a., collateral circulation is provided to the UL by the _______ and ______

Answer 19

Thyrocervical trunk

Subscapular artery (reversal of blood flow thru)

Question 20

Pectoralis Major m.
A:

N:

Answer 20

Adducts and medially rotates humerus

Med. and Lat. pectoral nerves and thoracoacrominal vessels

Question 21

Pectoralis Minor m.
A:

N:

Answer 21

Protracts scapula

Medial Pectoral nerve and Thoracoacromial vessels

Question 22

The Lateral Thoracic (Mammary) artery is a branch of the _____ artery (deep to _____ m.), runs with the _____ n., and supplies the ________.

Answer 22

Axillary artery

Pec. Minor m.

Long thoracic n.

Lateral thorax, lateral pec region, lateral breast

Question 23

The Internal Thoracic (Mammary) artery is a branch of the ____ a. (Inside the ____) and supplies the ______.

Answer 23

Subclavian a.

Thorax

Ant. Thorax, Medial pec region and medial breast

Question 24

The Thoracoacromial artery is a branch of the _____ a. (Deep to _____ m.) and sends off 4 branches:

Answer 24

Axillary a.
Pec minor m.

1. Pectoral a. - upper pec
2. Clavicular a. - clavicle region
3. Acromial a. - upper shoulder
4. Deltoid a. - lower shoulder

Question 25

Cutaneous Nerves supply:

Answer 25

Sensory to:

• T1-T6 cutaneous regions
• Lateral and anterior cutaneous branches of intercostal nn.

Question 26

The Medial Pectoral N. is derived from ____. It pierces the ____ to enter the ____ and supplies both.

Answer 26

C8-T1

Pec minor m.

Pec major m.

Question 27

The Lateral Pectoral Nerve is derived from ____. It runs above ____ to only supply the ____.

Answer 27

C5-C7

Pec minor m.

Pec major m.

Question 28

The Long Thoracic Nerve is derived from ____. It supplies the _____ superficially. Damage to this nerve can occur during ____, resulting in ____.

Answer 28

C5-C7

Serratus Anterior m.

Mastectomy
“Winged Scapula”