Anterior Trunk

Question 1

Pectoralis major

Answer 1

O-sternal end of clavicle AND sternum AND cartilage of ribs 1-6 AND aponeurosis of external oblique muscle

I-fibers converge to insert by a short tendon into intertubercular sulcus and greater tubercle of humerus

Question 2

Pectoralis minor

Answer 2

O-anterior surface of ribs 3-5

I-coracoid process of scapula

Question 3

Serratus anterior

Answer 3

O-series of muscle slips from ribs 1-8

I-entire anterior surface of vertebral border of scapula

Question 4

Diaphragm

Answer 4

O-inferior, internal surface of rib cage and sternum AND costal cartilages of last six ribs AND lumbar vertebrae

I-central tendon

Question 5

External intercostals

Answer 5

O-inferior border of rib above

I-superior border of rib below

Question 6

Internal intercostals

Answer 6

O-superior border of rib below

I-inferior border of rib above

Question 7

External oblique

Answer 7

O-by fleshy strip from outer surfaces of lower eight ribs

I-most fibers insert into linea alba via a broad aponeurosis; some insert into pubic crest and tubercle and iliac crest

Question 8

Internal oblique

Answer 8

O-lumbar fascia AND iliac crest AND inguinal ligament

I-linea alba AND pubic creat AND last 3 or 4 ribs AND costal margin

Question 9

Transversus abdominis

Answer 9

O-inguinal ligament AND lumbar fascia AND cartilages of last 6 ribs; iliac crest

I-linea alba AND pubic crest

Question 10

Rectus abdominis

Answer 10

O-pubic crest AND symphysis

I-xiphoid process AND cost cartilages of ribs 5-7

Question 11

Tendinous intersections

Answer 11

O-

Question 12

Linea alba (tendon)

Answer 12

O-

Question 13

Inguinal ligament

Answer 13

O-