Muscular Pt.2 Brachium Muscles

Question 1

Pectoralis Major:

Answer 1

Location: Superficial anterior thorax

Insertion: proximal humerus

Action: Flexes, aDDucts medially to rotate humerus

Question 2

Latissiumus Dorsi:

Answer 2

Location: Superficial posterior thorax

Insertion: Humerus

Shape: wide muscle from waist to armpit

Question 3

Latissiumus Dorsi Actions:

Answer 3

ADDuction & medially rotate humerus

backward swing of arms to walk

arms upward to pull body up do a chin up

Question 4

Deltoid:

Answer 4

Location: Cap of shoulder
Insertion: Diaphysis of humerus

Shape: Triangular

Action: swings arm while walking

adjustment of hand height to reach for a item on a shelf

Question 5

Deltoid Fibers:

Answer 5

Anterior fibers: flex arm/ shoulder

Lateral fibers: ABDUCT arm

Posterior fibers: extend fibers