Test 2 - Muscles of the Chest and Arms

Question 1

Pectoralis major

Answer 1

Fan shaped from shoulder across chest
Prime mover of arm flexion
Adducts arm
Medially rotates

Question 2

Serratus anterior

Answer 2

Attaches scapula to ribs
Prime mover to hold scapula against chest wall
Rotates scapula
Raises arms

Question 3

Deltoid

Answer 3

Triangular muscle across front of shoulder

Prime mover of arm abduction

Question 4

Pectoralis minor

Answer 4

Flat thin muscle from point of shoulder to ribs
Covered by pectoralis major
Draws rib cage up

Question 5

External intercostals

Answer 5

Under ribs

Pulls ribs up - inspiration

Question 6

Internal intercostals

Answer 6

Under ribs
Flatten ribs
Exhalation

Question 7

Diaphragm

Answer 7

Floor of thoracic cavity
Prime mover of inspiration
Flattens on contraction

Question 8

Rectus abdominis

Answer 8

Major medial vertical abs
Flex and rotate vertebral column
Stabilize pelvis

Question 9

External oblique

Answer 9

V down pelvis to pubis
Trunk rotation and flexion
Works with rectus abdominis

Question 10

Internal oblique

Answer 10

Upside down V below external obliques

Same as external oblique

Question 11

Transversus abdominis

Answer 11

Deep abdominal muscle
Horizontal fibers
Compresses abdominal cavity