Pectoral/thoracic/appendicular muscles

Question 1

Pec major (clavicular, stenocostal, abdominal) O

Answer 1

O-
Clav- ant border of med half of clavical , SC jnt, ant surface of sternum

Sternocostal- ant surf of 7 costal cart, sternocostal jnts

Abdominal- aponeurosis of ext oblique, rectus sheeth

Question 2

pec major i, IN, A (all + alone)

Answer 2

I- lat lip of intertubercular groove of humerus, fibrous cap of shoulder j

IN- clav (LAT pectoral only C5,6), Sterno/abdominal (lat and med C5,6,7,8,t1)

A- adduct, med rotate

clav- flexes arm
stern and abdominal- extend from flexed

Question 3

Pec minor- O, I, IN, A

Answer 3

O- ant surface of 3,4,5 ribs near cartilages

I- Coracoid process (med + sup border)

In- Med + Lat pectoral n C5-T1

A- stabalizes scap (draws ant + inf), depresses shoulder j

Question 4

Subclavius- O, I, IN, A

Answer 4

O- junction of the 1st rib +costal cartilages

I- inf surface of middle third clavical

IN- subclavian n C5,6

A- anchors/depresses clavical, prevents dislocation of SC j

Question 5

Delt- O (ant, mid, post), I, IN ,A

Answer 5

O-
ant- lat 1/3 of clav ant border
Mid- acromion
post- lower ridge of scap spine

In- deltoid tub

IN- axillary c5,6

A- flex, medially rotat, abduct, extend +lat rotate