Pectoral Girdle

Question 1

What makes up the Pectoral Girdle?

Answer 1

Scapular
-lies over ribs 2-7
-Posterior-lateral aspect of the thorax
Clavicle (collar bone)

Question 2

Describe the anatomy of the scapular

Answer 2

Flat triangular bone
2 surfaces
3 borders
Three angles - sup,infra,”lat=glenoid fossae”
Spine of scapular devides supra-/infra-spinous fossae
Acromion process projecting anteriorly
Coracoid process projects anteriorly, inferior to clavicle

Question 3

Describe the anatomy of the clavicle

Answer 3

Subcutaneous bone between sternum&acromion
Medial 2/3 are convex
Lat 1/3 concave forward
Smooth superior surface
Inferior surface: costoclavicular area medially and conoid tubercle and trapezoid line laterally

Question 4

Describe the anatomy of the sternoclavicular joint

Answer 4

Med clav & suplat angle of manubrium & adjacent 1st rib
Large clav articular surface 
Fibrocartilage covers art surfaces
Fibrocartilaginous intra-articular disc 
Concavoconvex
Saddle joint

Question 5

Describe the anatomy of the acromioclavicular joint

Answer 5

Flat oval articular surfaces 
Fibrocartilage
Clav faces posterolaterally
Acromion faces anteromedially
Synovial plane joint

Question 6

What are the ligaments of the sternoclavicular joint?

Answer 6

Costoclavicular ligament
Inter clavicle are ligament (both clavs and sternum)
Anterior SClig

Question 7

What are the ligaments of the acromioclavicular joint?

Answer 7

Coracoclavicular ligament

Coraco-acromial ligament

Question 8

Describe the Trapezius muscle

Answer 8

Orig - med 1/3 sup nuchal line, external occ protuberance, lig nuchae, SPs and SP ligs C7-T12
Inserts - Post lat 1/3 of clav, med border acromion, superior border spine of scap
Spinal accessory nerve
Elevation, lat rotation and depression

Question 9

Describe the anatomy of Levator Scapulae

Answer 9

Elevates, retracts, medially rotates
Orig-TP C1-4
Insert-sup med border scapular
Dorsal scapular nerv c5

Question 10

What is the anatomy of Serratus anterior?

Answer 10

Protraction, lat rotation
Orig- upper 8/9 ribs outer and Intercostal fascia
Insert-ant med border scapular
Long thoracic nerve C5-7

Question 11

What is the anatomy of Pectoralis Minor?

Answer 11

Deep to PM
Protraction and med rot
Orig- CP
Insert-outer surface and IF ribs 3-5 
Med and lat pectoral nerves C6-8

Question 12

Describe the anatomy of the subclavius

Answer 12

Stabilises clav
1st rib and undersurface to clavicle
Nere - C5-6

Question 13

Describe the anatomy of Rhomboids Major/Minor

Answer 13

Elevates, retracts, med rot
Minor sup to major
Orig- SPS C7-T1 and T2-5
Insert - sup/inf med border 
Dorsal scap nerve C5