Scapular & Pectoral Regions

Question 1

Joints of the shoulder (3)

Answer 1

sternoclavicular
acromioclavicular
coracoclavicular

Question 2

Scapula connects ___ to ____ between what ribs

Answer 2

Connects clavicle to humerus between 2nd to 7th

Question 3

Muscles of pectoral girdle (6) (4 rotator)

Answer 3

Deltoid
Teres major
Supraspinatus
Infraspinatus
Teres minor
Subscapularis

Question 4

Deltoid Action (1 primary) (3 secondary)

Answer 4

Abducts humerus (primary)
Flexes, extends and rotates humerus (secondary)

Question 5

Deltoid Neurovasculature

Answer 5

Axillary n. (C5 C6)

Posterior Circumflex Humeral vessels

Question 6

Teres Major Action (2)

Answer 6

Interally/medially rotates and extends humerus

Question 7

Teres Major Neurovasculature

Answer 7

Lower (inferior) subscapular nerve (C5-C7)

Subscapular vessels

Question 8

Supraspinatus Action (1)

Answer 8

Abducts humerus (initiates and continues action)

Question 9

Supraspinatus Neurovasculature

Answer 9

Suprascapular nerve (C5-C6)
Suprascapular vessels and (dorsal scapular vessels)

Question 10

Infraspinatus Action (1)

Answer 10

Laterally (externally) rotates humerus

Question 11

Infraspinatus Neurovasculature

Answer 11

Suprascapular nerve C5-C6

Suprascapular vessels subscapular vessels

Question 12

Teres Minor Action (1)

Answer 12

Lateral (external) rotation of humerus

Question 13

Teres Minor Neurovasculature

Answer 13

Axillary Nerve (C5-C6)
Suprascapular vessels Subscapular vessels

Question 14

Subscapularis Action (1)

Answer 14

Medial rotation of humerus

Question 15

Subscapularis Neurovasculature

Answer 15

Upper and lower subscapular nerves

Subscapular vessels

Question 16

Quadrangular space includes

Answer 16

Axillary Nerve

Posterior circumflex humeral artery

Question 17

Triangular space includes

Answer 17

Circumflex scapular artery

Question 18

Quadrangular space syndrome

Answer 18

disruption in space causing impingement on axillary nerve
Uncommonly: Weakness in deltoid
Common: atrophy of teres minor

Question 19

Triangular space borders

Answer 19

Superior: teres minor
Inferior: teres major
Lateral: long head of triceps brachii

Question 20

Suprascapular n.
____Rami of ____
Runs (under/over) ______ and

Answer 20

Ventral rami of C5-C6

Runs under superior transverse scapular ligament through suprascapular notch

Question 21

Suprascapular artery
Branch of ______
Runs (under/over)____ ligament and ____

Answer 21

Branch of thyrocervical trunk

Runs over superior transverse scapular ligament above suprascapular notch

Question 22

Suprascapular n. and a.
pass thru ___ to ____ fossa
Supply _____ and _______

Answer 22

pass thru spinoglenoid notch to infraspinatus fossa

supply supraspinatus and infraspinatus

Question 23

Dorsal scapular nerve

____ Ramus of ___

Answer 23

Ventral ramus C5

Question 24

Dorsal scapular nerve
Deep transverse cervical artery
Run parallel to _____ border of _____
Supply ____ and ______

Answer 24

Run parallel to vertebral border of scapula

Supply levator scapulae and rhomboid muscles

Question 25

Accessory Nerve (CNXI) Superficial Transverse cervical artery Supply what muscle

Answer 25

Trapezius (also C3 C4)

Question 26

Superficial Transverse cervical artery Branch of Runs ____ to what muscle?

Answer 26

Branch of thyrocervical trunk | Runs deep to trapezius

Question 27

Upper and Lower subscapular nerve _____ cord of _____ plexus ____ rami of ______

Answer 27

Posterior cord of brachial plexus | Ventral rami of C5-C6

Question 28

Subscapular Artery Branch of ______ Splits into _______ and_______

Answer 28

Branch of Axillary artery | Splits into thoracodorsal and circumflex scapular

Question 29

Upper and lower subscapular n (C...) Subscapular artery Supply what muscle?

Answer 29

C5 C6 C7 | Supply subscapularis

Question 30

Collateral circulation of scapular region by

Answer 30

``` Thyrocervical trunk subscapular artery (blood flow reverses) ```

Question 31

Pectoralis major | Action

Answer 31

Adducts | medially rotates humerus

Question 32

Pectoralis major Neurovasculature

Answer 32

Medial and lateral pectoral nerves | Thoracoacromial vessels

Question 33

Pectoralis minor | Action

Answer 33

Protracts scapular

Question 34

Pectoralis minor | Neurovasculature

Answer 34

Medial pectoral nerve | Thoracoacromial vessels

Question 35

Pectoral region arterial supply (3)

Answer 35

``` Lateral Thoracic (mammary) Internal Thoracic (mammary) Thoracoacromial ```

Question 36

``` Lateral thoracic artery Branch of _____ Runs with ______ nerve Supplies ____ ______ ______ Relation to pec minor ```

Answer 36

Branch of axillary Runs with long thoracic nerve Supplies Lateral thorax, lateral pec, lateral breast Deep to pec minor

Question 37

Internal thoracic artery Branch of Location Supplies _____ _____ _____

Answer 37

Branch of subclavian artery descends across intercostal space posterior to ribs Supplies anterior thorax, medial pec region, medial breast

Question 38

Internal thoracic artery | Branches (4)

Answer 38

Musculophrenic Superior epigastric anterial intercostal pericardiacophrenic

Question 39

Thoracoacromial artery | Branch of

Answer 39

Axillary artery

Question 40

Thoracoacromial artery | Branches (4)

Answer 40

Pectoral: upper pec Clavicular: clavicle Acromial: upper shoulder Deltoid: lower shoulder

Question 41

Pectoral region innervation (4)

Answer 41

Cutaneous nerves Median Pectoral Nerve Lateral Pectoral Nerve Long Thoracic Nerve

Question 42

Cutaneous Nerves Type Vertebral levels Branches of ____

Answer 42

General sensory T1-T6 Branches of Intercostal nerves

Question 43

Medial pectoral nerve Derived from ____ rami (Vertebral levels) _____ cord of ____ plexus Supplies

Answer 43

Derived from ventral rami C8-T1 Medial cord of brachial plexus Supplies pec minor and part of pec major Runs through pec minor to enter pec major

Question 44

Lateral pectoral nerve Derived from ____ rami (vertebral levels) _____ cord of _____ plexus Supplies

Answer 44

Derived from ventral rami C5-C7 Lateral cord of brachial plexus Supplies remaineder of pec major Runs above pec minor to enter pec major

Question 45

Long Thoracic nerve Derived from _____ rami (vertebral levels) Supplies Damage can occur during___ resulting in_____

Answer 45

C5-C7 Supplies serratus anterior superficially Damage can occur during mastectomy resulting in winged scapula