Pectoral and Scapular Regions

Question 1

How many muscles make up the pectoral region

Answer 1

4

Question 2

what muscle moves the clavicle (pectoral region)

Answer 2

subcalvius - C5,6

Question 3

What muscle moves the humorous (pectoral region)

Answer 3

pectoralis major - medial (C8,T1) and lateral pectoral (c5,6,7)

Question 4

what muscles move the scapula (pectoral region)

Answer 4

pectoralis minor - medial pectoral nerve (C8,T1)

serrates anterior - long thoracic nerve (C5,6,7)

Question 5

pectoralis major

Answer 5

2 heads
adducts
medially rotates

Question 6

pectoralis minor

Answer 6

stabilises/depresses scapulas

Question 7

subclavius

Answer 7

stabilises/depresses clavicle

Question 8

serratus anterior

Answer 8

protracts

prevents winging scapular rotation

Question 9

what muscle moves the humorous (extrinsic back muscles)

Answer 9

lattissimus dorsi - thoracodorsal nerve (C6,7,8)

Question 10

what muscles move the scapula (extrinsic back muscles)

Answer 10

trapezius - spinal accessory
rhomboids (major and minor) - dorsal scapular nerve (C3,4)
levator scapula - cervical nerves (C3,4) dorsal scapular (c4,5)

Question 11

latissimus dorsi

Answer 11

action at GH joint
extends
adducts
medially rotates

Question 12

prime mover in elevation/depression of scapula

Answer 12

upper trapezius and gravity

Question 13

prime mover in protraction and retraction

Answer 13

serratus anterior and middle trapezius

Question 14

prime mover for upward rotation and downward rotation

Answer 14

upper trapezius and serratus anterior

latissimus dorsi

Question 15

nerves that supply the deltoid

Answer 15

axillary nerve (C5,6)

Question 16

nerves that supply the tires major

Answer 16

lower sub scapular nerve (c5,6)

Question 17

what are the three functional parts of the deltoid

Answer 17

anterior (clavicular)
-flexion
-medial rotation
middle (acromial)
-abduction
posterior (spinal) 
-extension 
-lateral rotation

Question 18

function of trees major

Answer 18

adduction and medial rotation

Question 19

what are the three muscles of the rotator cuff - holds the humeral head in the glenoid fossa

Answer 19

– Supraspinatus – Suprascapular Nerve (C4,5,6)
– Infraspinatus – Suprascapular Nerve (C5,6)
– Teres Minor – Axillary nerve (C5,6)
– Subscapularis – U and L Subscapular nerves (C5,6,7)

Question 20

actions of the rotator cuff

Answer 20

initial abduction (15 degrees) SUPRASPINATUS
external rotation INFRASPINATUS
internal rotation SUBSCAPULARIS

Question 21

Elements of stability of the glenohumeral joint

Answer 21

• 3 insert on greater tuberosity
• 1 On to lesser tuberosity
• Surround humeral head
• Supraspinatus runs beneath acromion
• Subacromial bursa • Inflation
• impingement

Question 22

what are the three arm muscles which cross the GH JOINT

Answer 22

– Long head of Biceps Brachii
– Corocobrachialis
– Long head of triceps

Question 23

what fascia is around the pectoral minor

Answer 23

clavipectoral

Question 24

Infraspinatus and

Supraspinatus fascia

Answer 24

• Origin of the muscles

* Really dense

Question 25

spaces in the scapular region

Answer 25

– Connect axilla to posterior of limb – Quadrangualr space – Triangular Space upper – Triangular Interval lower

Question 26

what are the contents of the axilla

Answer 26

* Axillary vessels * Brachial Plexus * Cords and branches • Axillary Sheath * From prevertebral fascia

Question 27

what are the 5 groups od lymph nodes

Answer 27

``` anterior lateral posterior central apical ```

Question 28

borders of the quadrangular space

Answer 28

teres minor teres major humorous long head of triceps

Question 29

contents of the scapular Spaces

Answer 29

• Posterior Circumflex Humeral Artery • Axillary nerve • (Surgical neck of Humerus)

Question 30

Triangular space (upper triangular space) borders

Answer 30

* Teres Minor * Teres Major * Long Head of Triceps

Question 31

Triangular space (upper triangular space) contents

Answer 31

* Circumflex Scapular artery | * Leads to scapular anastomosis

Question 32

• Triangular interval (lower triangular space) borders

Answer 32

* Lateral head of Triceps * Long Head of Triceps * Teres Major

Question 33

Triangular interval (lower triangular space) contents

Answer 33

* Radial nerve * Profunda Brachii artery * Leads to spiral groove