Pec Major/Minor, Serratus Anterior, & Intercostals

what's the origin and insertion of the external intercostals?

O: Inferior of rib above EIA I: Superior of rib below

What is the origin and the insertion of the internal intercostals?

O: Superior of rib below I: Inferior of rib above

What is the Origin and Insertion of the pectoralis major?

O: medial 1/2 of the clavicle, sternum and cartilage of the ribs 1-6 I: Crest of greater tubercle of humerus (medial)

What is the external intercostals Function? EE

To elevate ribs during inspiration, muscle pulls towards origin

what is protraction?

abduction, drawing away from, lateral, outward , forward,

What is contraction?

becoming smaller, shortening, tightening

What is the function of the pectoralis MINOR?

depresses, abducts, and tilts scapula (anteriorly), and assists in forced inhalation

What is retraction?

drawing back in, back to medial, adduction, inward

What is the function of the serratus anterior?

draws scapula forward, rotates scapula to raise shoulder in a abduction of the arm, scapula abduction against resistance. protraction elevates.

What is the serratus anterior muscle?

it is the boxing muscle. the wolverine hands, the rib cage imprint

What is the internal intercostals function? ID

to depress the ribs during expiration , exhaling.

What is the origin and insertion of the serratus anterior?

O: ribs 1-8/9 I: anterior surface of medial border of scapula [between ribs and scapula]

What is the origin and insertion of the pectoralis minor?

O: ribs 3-5 I: coracoid process of scapula

What is the function of the pectoralis major?

adducts inwardly. horizontally flexes, and to rotate arms medially