Trunk Muscles

Question 1

Pectoralis Major

Answer 1

O: Clavicle, Sternum, and first 6 ribs
I: Greater Tubercle
F: Shoulder flexion, internal rotation, and adduction

Question 2

Intercostal Muscles

Answer 2

O: Ribs
I: Ribs
F: Breathing

Question 3

Rectus Abdominis

Answer 3

O: Pubic bone
I: Lower Rib cage
F: flex trunk (crunches)

Question 4

External Oblique

Answer 4

O: Posterior Lower Thoracic cage
I: Midline (Itself)
F: Compress Abdomen

Question 5

Internal Oblique

Answer 5

O: Ilium and Lumbar connective tissue
I: Midline (itself)
F: Compress abdomen

Question 6

Transverse Abdominis

Answer 6

O: Ilium, L Vertebrae, and lower ribs,
I: Midline
F: compress abdomen

Question 7

Trapezius

Answer 7

O: Occipital, C Vertebrae, Thoracic spinous Process
I: Spine of Scapula
F: Elevate, retract, or depress scapula. Extend Neck

Question 8

Latissimus Dorsi

Answer 8

O:Lower Vertebrae, Lower Ribs, and ilium
I: Intertribal Groove
F: Shoulder extension, internal rotation, and adduction.

Question 9

Erector Spinae

Answer 9

O: Iliac crest, ribs, vertebrae
I: Ribs, c and t vertebrae
F: Extend back