pectoralis major and minor

pectoralis minor/origin

anterior surface of ribs 3,4,5 near the coastal cartilage

pectoralis minor insertion

coracoid process of scapula

subclavius action

depression of shoulder elevate the 1st rib Stabilizes clavicle during shoulder movements ****prevents extreme elevation and protraction of the clavicle

trigger points for pectoralis major and minor

mimics heart attack pain (anterior shoulder pain, breast pain ,and diffuse soreness) "cardiac arrhythmia "on the right side lateral to xiphoid process between fifth and six ribs

pectoralis major

nicknamed "poor posture "and *****the" heart attack muscle "most superficial muscle of the chest

pec major origin

clavicular head medial 1/2 of clavicle Sternal head sternum and first six costal cartilage surfaces

subclavius insertion

Inferior surface of middle third of clavicle

pec major on test

crosses 3 joints acrominal/ clavicular sternal /clavicular glenohumeral joint

pec major Insertion

lateral lip of the bicipital groove

pec major action

protraction of scapula adduction horizontal abduction flexion and medial rotation of the humerus

pectoralis minor action

protraction, depression, downward rotation of scapula raises ribs in forced inspiration

pec minor

can entrap the neurovascular structure in the upper chest wall facilitating numbness ,tingling ,and pain in the upper extremities

thoracic outlet syndrome** on test

condition in which the scalene muscles draw the upper rib Superior the pectoralis minor pulls the clavicle inferior narrowing the space between clavicle and ribs

Subclavius Origin

costal cartilage of rib 1

pectoralis minor

stabilizes the clavicle deep to the pectoralis major when you show your shoulders you stretch this muscle